diff --git a/adminer/call.inc.php b/adminer/call.inc.php
index 36c9e333..c409fd7e 100644
--- a/adminer/call.inc.php
+++ b/adminer/call.inc.php
@@ -36,12 +36,12 @@ if (!$error && $_POST) {
 	$start = microtime(true);
 	$result = $connection->multi_query($query);
 	$affected = $connection->affected_rows; // getting warnings overwrites this
-	echo $adminer->selectQuery($query, $start, !$result);
+	echo adminer()->selectQuery($query, $start, !$result);
 
 	if (!$result) {
 		echo "<p class='error'>" . error() . "\n";
 	} else {
-		$connection2 = connect($adminer->credentials());
+		$connection2 = connect(adminer()->credentials());
 		if (is_object($connection2)) {
 			$connection2->select_db(DB);
 		}
@@ -71,7 +71,7 @@ if ($in) {
 	foreach ($in as $key) {
 		$field = $routine["fields"][$key];
 		$name = $field["field"];
-		echo "<tr><th>" . $adminer->fieldName($field);
+		echo "<tr><th>" . adminer()->fieldName($field);
 		$value = idx($_POST["fields"], $name);
 		if ($value != "") {
 			if ($field["type"] == "set") {
diff --git a/adminer/db.inc.php b/adminer/db.inc.php
index 3494d700..93554519 100644
--- a/adminer/db.inc.php
+++ b/adminer/db.inc.php
@@ -54,7 +54,7 @@ if ($tables_views && !$error && !$_POST["search"]) {
 
 page_header(($_GET["ns"] == "" ? lang('Database') . ": " . h(DB) : lang('Schema') . ": " . h($_GET["ns"])), $error, true);
 
-if ($adminer->homepage()) {
+if (adminer()->homepage()) {
 	if ($_GET["ns"] !== "") {
 		echo "<h3 id='tables-views'>" . lang('Tables and views') . "</h3>\n";
 		$tables_list = tables_list();
@@ -146,7 +146,7 @@ if ($adminer->homepage()) {
 				: "")))
 				. "<input type='submit' name='truncate' value='" . lang('Truncate') . "'> " . on_help(JUSH == "sqlite" ? "'DELETE'" : "'TRUNCATE" . (JUSH == "pgsql" ? "'" : " TABLE'")) . confirm()
 				. "<input type='submit' name='drop' value='" . lang('Drop') . "'>" . on_help("'DROP TABLE'") . confirm() . "\n";
-				$databases = (support("scheme") ? $adminer->schemas() : $adminer->databases());
+				$databases = (support("scheme") ? adminer()->schemas() : adminer()->databases());
 				if (count($databases) != 1 && JUSH != "sqlite") {
 					$db = (isset($_POST["target"]) ? $_POST["target"] : (support("scheme") ? $_GET["ns"] : DB));
 					echo "<p>" . lang('Move to other database') . ": ";
diff --git a/adminer/drivers/mssql.inc.php b/adminer/drivers/mssql.inc.php
index c83c2ed8..63adc3b6 100644
--- a/adminer/drivers/mssql.inc.php
+++ b/adminer/drivers/mssql.inc.php
@@ -26,16 +26,15 @@ if (isset($_GET["mssql"])) {
 			}
 
 			function attach(?string $server, string $username, string $password): string {
-				global $adminer;
 				$connection_info = array("UID" => $username, "PWD" => $password, "CharacterSet" => "UTF-8");
-				$ssl = $adminer->connectSsl();
+				$ssl = adminer()->connectSsl();
 				if (isset($ssl["Encrypt"])) {
 					$connection_info["Encrypt"] = $ssl["Encrypt"];
 				}
 				if (isset($ssl["TrustServerCertificate"])) {
 					$connection_info["TrustServerCertificate"] = $ssl["TrustServerCertificate"];
 				}
-				$db = $adminer->database();
+				$db = adminer()->database();
 				if ($db != "") {
 					$connection_info["Database"] = $db;
 				}
diff --git a/adminer/drivers/mysql.inc.php b/adminer/drivers/mysql.inc.php
index ea92f131..0b252fdf 100644
--- a/adminer/drivers/mysql.inc.php
+++ b/adminer/drivers/mysql.inc.php
@@ -15,10 +15,9 @@ if (!defined('Adminer\DRIVER')) {
 			}
 
 			function attach(?string $server, string $username, string $password): string {
-				global $adminer;
 				mysqli_report(MYSQLI_REPORT_OFF); // stays between requests, not required since PHP 5.3.4
 				list($host, $port) = explode(":", $server, 2); // part after : is used for port or socket
-				$ssl = $adminer->connectSsl();
+				$ssl = adminer()->connectSsl();
 				if ($ssl) {
 					$this->ssl_set($ssl['key'], $ssl['cert'], $ssl['ca'], '', '');
 				}
@@ -158,9 +157,8 @@ if (!defined('Adminer\DRIVER')) {
 			public string $extension = "PDO_MySQL";
 
 			function attach(?string $server, string $username, string $password): string {
-				global $adminer;
 				$options = array(\PDO::MYSQL_ATTR_LOCAL_INFILE => false);
-				$ssl = $adminer->connectSsl();
+				$ssl = adminer()->connectSsl();
 				if ($ssl) {
 					if ($ssl['key']) {
 						$options[\PDO::MYSQL_ATTR_SSL_KEY] = $ssl['key'];
diff --git a/adminer/drivers/pgsql.inc.php b/adminer/drivers/pgsql.inc.php
index 5c4e7f82..d4d0ff42 100644
--- a/adminer/drivers/pgsql.inc.php
+++ b/adminer/drivers/pgsql.inc.php
@@ -20,11 +20,10 @@ if (isset($_GET["pgsql"])) {
 			}
 
 			function attach(?string $server, string $username, string $password): string {
-				global $adminer;
-				$db = $adminer->database();
+				$db = adminer()->database();
 				set_error_handler(array($this, '_error'));
 				$this->string = "host='" . str_replace(":", "' port='", addcslashes($server, "'\\")) . "' user='" . addcslashes($username, "'\\") . "' password='" . addcslashes($password, "'\\") . "'";
-				$ssl = $adminer->connectSsl();
+				$ssl = adminer()->connectSsl();
 				if (isset($ssl["mode"])) {
 					$this->string .= " sslmode='" . $ssl["mode"] . "'";
 				}
@@ -53,8 +52,7 @@ if (isset($_GET["pgsql"])) {
 			}
 
 			function select_db(string $database): bool {
-				global $adminer;
-				if ($database == $adminer->database()) {
+				if ($database == adminer()->database()) {
 					return $this->database;
 				}
 				$return = @pg_connect("$this->string dbname='" . addcslashes($database, "'\\") . "'", PGSQL_CONNECT_FORCE_NEW);
@@ -130,11 +128,10 @@ if (isset($_GET["pgsql"])) {
 			public int $timeout;
 
 			function attach(?string $server, string $username, string $password): string {
-				global $adminer;
-				$db = $adminer->database();
+				$db = adminer()->database();
 				//! client_encoding is supported since 9.1, but we can't yet use min_version here
 				$dsn = "pgsql:host='" . str_replace(":", "' port='", addcslashes($server, "'\\")) . "' client_encoding=utf8 dbname='" . ($db != "" ? addcslashes($db, "'\\") : "postgres") . "'";
-				$ssl = $adminer->connectSsl();
+				$ssl = adminer()->connectSsl();
 				if (isset($ssl["mode"])) {
 					$dsn .= " sslmode='" . $ssl["mode"] . "'";
 				}
@@ -142,8 +139,7 @@ if (isset($_GET["pgsql"])) {
 			}
 
 			function select_db(string $database): bool {
-				global $adminer;
-				return ($adminer->database() == $database);
+				return (adminer()->database() == $database);
 			}
 
 			function query(string $query, bool $unbuffered = false) {
diff --git a/adminer/dump.inc.php b/adminer/dump.inc.php
index 6d472e64..09a8eea3 100644
--- a/adminer/dump.inc.php
+++ b/adminer/dump.inc.php
@@ -39,7 +39,7 @@ SET foreign_key_checks = 0;
 	}
 
 	foreach ((array) $databases as $db) {
-		$adminer->dumpDatabase($db);
+		adminer()->dumpDatabase($db);
 		if ($connection->select_db($db)) {
 			if ($is_sql && preg_match('~CREATE~', $style) && ($create = get_val("SHOW CREATE DATABASE " . idf_escape($db), 1))) {
 				set_utf8mb4($create);
@@ -99,12 +99,12 @@ SET foreign_key_checks = 0;
 							ob_start(array($tmp_file, 'write'), 1e5);
 						}
 
-						$adminer->dumpTable($name, ($table ? $_POST["table_style"] : ""), (is_view($table_status) ? 2 : 0));
+						adminer()->dumpTable($name, ($table ? $_POST["table_style"] : ""), (is_view($table_status) ? 2 : 0));
 						if (is_view($table_status)) {
 							$views[] = $name;
 						} elseif ($data) {
 							$fields = fields($name);
-							$adminer->dumpData($name, $_POST["data_style"], "SELECT *" . convert_fields($fields, $fields) . " FROM " . table($name));
+							adminer()->dumpData($name, $_POST["data_style"], "SELECT *" . convert_fields($fields, $fields) . " FROM " . table($name));
 						}
 						if ($is_sql && $_POST["triggers"] && $table && ($triggers = trigger_sql($name))) {
 							echo "\nDELIMITER ;;\n$triggers\nDELIMITER ;\n";
@@ -130,7 +130,7 @@ SET foreign_key_checks = 0;
 				}
 
 				foreach ($views as $view) {
-					$adminer->dumpTable($view, $_POST["table_style"], 1);
+					adminer()->dumpTable($view, $_POST["table_style"], 1);
 				}
 
 				if ($ext == "tar") {
@@ -140,7 +140,7 @@ SET foreign_key_checks = 0;
 		}
 	}
 
-	$adminer->dumpFooter();
+	adminer()->dumpFooter();
 	exit;
 }
 
@@ -165,9 +165,9 @@ if (!isset($row["events"])) { // backwards compatibility
 	$row["triggers"] = $row["table_style"];
 }
 
-echo "<tr><th>" . lang('Output') . "<td>" . html_radios("output", $adminer->dumpOutput(), $row["output"]) . "\n";
+echo "<tr><th>" . lang('Output') . "<td>" . html_radios("output", adminer()->dumpOutput(), $row["output"]) . "\n";
 
-echo "<tr><th>" . lang('Format') . "<td>" . html_radios("format", $adminer->dumpFormat(), $row["format"]) . "\n";
+echo "<tr><th>" . lang('Format') . "<td>" . html_radios("format", adminer()->dumpFormat(), $row["format"]) . "\n";
 
 echo (JUSH == "sqlite" ? "" : "<tr><th>" . lang('Database') . "<td>" . html_select('db_style', $db_style, $row["db_style"])
 	. (support("type") ? checkbox("types", 1, $row["types"], lang('User types')) : "")
@@ -221,7 +221,7 @@ if (DB != "") {
 	echo "<label class='block'><input type='checkbox' id='check-databases'" . ($TABLE == "" ? " checked" : "") . ">" . lang('Database') . "</label>";
 	echo script("qs('#check-databases').onclick = partial(formCheck, /^databases\\[/);", "");
 	echo "</thead>\n";
-	$databases = $adminer->databases();
+	$databases = adminer()->databases();
 	if ($databases) {
 		foreach ($databases as $db) {
 			if (!information_schema($db)) {
diff --git a/adminer/edit.inc.php b/adminer/edit.inc.php
index 5f12f824..247066d6 100644
--- a/adminer/edit.inc.php
+++ b/adminer/edit.inc.php
@@ -6,7 +6,7 @@ $fields = fields($TABLE);
 $where = (isset($_GET["select"]) ? ($_POST["check"] && count($_POST["check"]) == 1 ? where_check($_POST["check"][0], $fields) : "") : where($_GET, $fields));
 $update = (isset($_GET["select"]) ? $_POST["edit"] : $where);
 foreach ($fields as $name => $field) {
-	if (!isset($field["privileges"][$update ? "update" : "insert"]) || $adminer->fieldName($field) == "" || $field["generated"]) {
+	if (!isset($field["privileges"][$update ? "update" : "insert"]) || adminer()->fieldName($field) == "" || $field["generated"]) {
 		unset($fields[$name]);
 	}
 }
diff --git a/adminer/foreign.inc.php b/adminer/foreign.inc.php
index 3ce59fb9..d0a55445 100644
--- a/adminer/foreign.inc.php
+++ b/adminer/foreign.inc.php
@@ -69,7 +69,7 @@ $target = array_keys(fields(in_array($row["table"], $referencable) ? $row["table
 $onchange = "this.form['change-js'].value = '1'; this.form.submit();";
 echo "<p>" . lang('Target table') . ": " . html_select("table", $referencable, $row["table"], $onchange) . "\n";
 if (support("scheme")) {
-	$schemas = array_filter($adminer->schemas(), function ($schema) {
+	$schemas = array_filter(adminer()->schemas(), function ($schema) {
 		return !preg_match('~^information_schema$~i', $schema);
 	});
 	echo lang('Schema') . ": " . html_select("ns", $schemas, $row["ns"] != "" ? $row["ns"] : $_GET["ns"], $onchange);
@@ -78,7 +78,7 @@ if (support("scheme")) {
 	}
 } elseif (JUSH != "sqlite") {
 	$dbs = array();
-	foreach ($adminer->databases() as $db) {
+	foreach (adminer()->databases() as $db) {
 		if (!information_schema($db)) {
 			$dbs[] = $db;
 		}
diff --git a/adminer/include/adminer.inc.php b/adminer/include/adminer.inc.php
index 321be6bf..a87900d8 100644
--- a/adminer/include/adminer.inc.php
+++ b/adminer/include/adminer.inc.php
@@ -3,8 +3,9 @@ namespace Adminer;
 
 // any method change in this file should be transferred to editor/include/adminer.inc.php
 
-/** Default Adminer plugin; it should call methods via $adminer->f() instead of $this->f() to give chance to other plugins */
+/** Default Adminer plugin; it should call methods via adminer()->f() instead of $this->f() to give chance to other plugins */
 class Adminer {
+	/** @var Adminer|Plugins */ static $instance;
 	/** @visibility protected(set) */ public string $error = ''; // HTML
 
 	/** Name in title and navigation
@@ -119,15 +120,14 @@ class Adminer {
 
 	/** Print login form */
 	function loginForm(): void {
-		global $adminer;
 		echo "<table class='layout'>\n";
 		// this is matched by compile.php
-		echo $adminer->loginFormField('driver', '<tr><th>' . lang('System') . '<td>', html_select("auth[driver]", SqlDriver::$drivers, DRIVER, "loginDriver(this);"));
-		echo $adminer->loginFormField('server', '<tr><th>' . lang('Server') . '<td>', '<input name="auth[server]" value="' . h(SERVER) . '" title="hostname[:port]" placeholder="localhost" autocapitalize="off">');
+		echo adminer()->loginFormField('driver', '<tr><th>' . lang('System') . '<td>', html_select("auth[driver]", SqlDriver::$drivers, DRIVER, "loginDriver(this);"));
+		echo adminer()->loginFormField('server', '<tr><th>' . lang('Server') . '<td>', '<input name="auth[server]" value="' . h(SERVER) . '" title="hostname[:port]" placeholder="localhost" autocapitalize="off">');
 		// this is matched by compile.php
-		echo $adminer->loginFormField('username', '<tr><th>' . lang('Username') . '<td>', '<input name="auth[username]" id="username" autofocus value="' . h($_GET["username"]) . '" autocomplete="username" autocapitalize="off">' . script("qs('#username').form['auth[driver]'].onchange();"));
-		echo $adminer->loginFormField('password', '<tr><th>' . lang('Password') . '<td>', '<input type="password" name="auth[password]" autocomplete="current-password">');
-		echo $adminer->loginFormField('db', '<tr><th>' . lang('Database') . '<td>', '<input name="auth[db]" value="' . h($_GET["db"]) . '" autocapitalize="off">');
+		echo adminer()->loginFormField('username', '<tr><th>' . lang('Username') . '<td>', '<input name="auth[username]" id="username" autofocus value="' . h($_GET["username"]) . '" autocomplete="username" autocapitalize="off">' . script("qs('#username').form['auth[driver]'].onchange();"));
+		echo adminer()->loginFormField('password', '<tr><th>' . lang('Password') . '<td>', '<input type="password" name="auth[password]" autocomplete="current-password">');
+		echo adminer()->loginFormField('db', '<tr><th>' . lang('Database') . '<td>', '<input name="auth[db]" value="' . h($_GET["db"]) . '" autocapitalize="off">');
 		echo "</table>\n";
 		echo "<p><input type='submit' value='" . lang('Login') . "'>\n";
 		echo checkbox("auth[permanent]", 1, $_COOKIE["adminer_permanent"], lang('Permanent login')) . "\n";
@@ -384,7 +384,6 @@ class Adminer {
 	* @param Index[] $indexes
 	*/
 	function selectSearchPrint(array $where, array $columns, array $indexes): void {
-		global $adminer;
 		print_fieldset("search", lang('Search'), $where);
 		foreach ($indexes as $i => $index) {
 			if ($index["type"] == "FULLTEXT") {
@@ -397,7 +396,7 @@ class Adminer {
 		}
 		$change_next = "this.parentNode.firstChild.onchange();";
 		foreach (array_merge((array) $_GET["where"], array(array())) as $i => $val) {
-			if (!$val || ("$val[col]$val[val]" != "" && in_array($val["op"], $adminer->operators()))) {
+			if (!$val || ("$val[col]$val[val]" != "" && in_array($val["op"], adminer()->operators()))) {
 				echo "<div>" . select_input(
 					" name='where[$i][col]'",
 					$columns,
@@ -405,7 +404,7 @@ class Adminer {
 					($val ? "selectFieldChange" : "selectAddRow"),
 					"(" . lang('anywhere') . ")"
 				);
-				echo html_select("where[$i][op]", $adminer->operators(), $val["op"], $change_next);
+				echo html_select("where[$i][op]", adminer()->operators(), $val["op"], $change_next);
 				echo "<input type='search' name='where[$i][val]' value='" . h($val["val"]) . "'>";
 				echo script("mixin(qsl('input'), {oninput: function () { $change_next }, onkeydown: selectSearchKeydown, onsearch: selectSearchSearch});", "");
 				echo "</div>\n";
@@ -528,7 +527,7 @@ class Adminer {
 	* @return list<string> expressions to join by AND
 	*/
 	function selectSearchProcess(array $fields, array $indexes): array {
-		global $connection, $driver, $adminer;
+		global $connection, $driver;
 		$return = array();
 		foreach ($indexes as $i => $index) {
 			if ($index["type"] == "FULLTEXT" && $_GET["fulltext"][$i] != "") {
@@ -536,7 +535,7 @@ class Adminer {
 			}
 		}
 		foreach ((array) $_GET["where"] as $key => $val) {
-			if ("$val[col]$val[val]" != "" && in_array($val["op"], $adminer->operators())) {
+			if ("$val[col]$val[val]" != "" && in_array($val["op"], adminer()->operators())) {
 				$prefix = "";
 				$cond = " $val[op]";
 				if (preg_match('~IN$~', $val["op"])) {
@@ -545,14 +544,14 @@ class Adminer {
 				} elseif ($val["op"] == "SQL") {
 					$cond = " $val[val]"; // SQL injection
 				} elseif ($val["op"] == "LIKE %%") {
-					$cond = " LIKE " . $adminer->processInput($fields[$val["col"]], "%$val[val]%");
+					$cond = " LIKE " . adminer()->processInput($fields[$val["col"]], "%$val[val]%");
 				} elseif ($val["op"] == "ILIKE %%") {
-					$cond = " ILIKE " . $adminer->processInput($fields[$val["col"]], "%$val[val]%");
+					$cond = " ILIKE " . adminer()->processInput($fields[$val["col"]], "%$val[val]%");
 				} elseif ($val["op"] == "FIND_IN_SET") {
 					$prefix = "$val[op](" . q($val["val"]) . ", ";
 					$cond = ")";
 				} elseif (!preg_match('~NULL$~', $val["op"])) {
-					$cond .= " " . $adminer->processInput($fields[$val["col"]], $val["val"]);
+					$cond .= " " . adminer()->processInput($fields[$val["col"]], $val["val"]);
 				}
 				if ($val["col"] != "") {
 					$return[] = $prefix . $driver->convertSearch(idf_escape($val["col"]), $val, $fields[$val["col"]]) . $cond;
@@ -947,8 +946,8 @@ class Adminer {
 	* @param string $missing can be "auth" if there is no database connection, "db" if there is no database selected, "ns" with invalid schema
 	*/
 	function navigation(string $missing): void {
-		global $connection, $adminer;
-		echo "<h1>" . $adminer->name() . " <span class='version'>" . VERSION;
+		global $connection;
+		echo "<h1>" . adminer()->name() . " <span class='version'>" . VERSION;
 		$new_version = $_COOKIE["adminer_version"];
 		echo " <a href='https://www.adminer.org/#download'" . target_blank() . " id='version'>" . (version_compare(VERSION, $new_version) < 0 ? h($new_version) : "") . "</a>";
 		echo "</span></h1>\n";
@@ -963,7 +962,7 @@ class Adminer {
 						if ($password !== null) {
 							$dbs = $_SESSION["db"][$vendor][$server][$username];
 							foreach (($dbs ? array_keys($dbs) : array("")) as $db) {
-								$output .= "<li><a href='" . h(auth_url($vendor, $server, $username, $db)) . "'>($name) " . h($username . ($server != "" ? "@" . $adminer->serverName($server) : "") . ($db != "" ? " - $db" : "")) . "</a>\n";
+								$output .= "<li><a href='" . h(auth_url($vendor, $server, $username, $db)) . "'>($name) " . h($username . ($server != "" ? "@" . adminer()->serverName($server) : "") . ($db != "" ? " - $db" : "")) . "</a>\n";
 							}
 						}
 					}
@@ -978,8 +977,8 @@ class Adminer {
 				$connection->select_db(DB);
 				$tables = table_status('', true);
 			}
-			$adminer->syntaxHighlighting($tables);
-			$adminer->databasesPrint($missing);
+			adminer()->syntaxHighlighting($tables);
+			adminer()->databasesPrint($missing);
 			$actions = array();
 			if (DB == "" || !$missing) {
 				if (support("sql")) {
@@ -995,7 +994,7 @@ class Adminer {
 			echo ($actions ? "<p class='links'>\n" . implode("\n", $actions) . "\n" : "");
 			if ($in_db) {
 				if ($tables) {
-					$adminer->tablesPrint($tables);
+					adminer()->tablesPrint($tables);
 				} else {
 					echo "<p class='message'>" . lang('No tables.') . "</p>\n";
 				}
@@ -1035,8 +1034,8 @@ class Adminer {
 
 	/** Print databases list in menu */
 	function databasesPrint(string $missing): void {
-		global $adminer, $connection;
-		$databases = $adminer->databases();
+		global $connection;
+		$databases = adminer()->databases();
 		if (DB && $databases && !in_array(DB, $databases)) {
 			array_unshift($databases, DB);
 		}
@@ -1050,7 +1049,7 @@ class Adminer {
 		echo "<input type='submit' value='" . lang('Use') . "'" . ($databases ? " class='hidden'" : "") . ">\n";
 		if (support("scheme")) {
 			if ($missing != "db" && DB != "" && $connection->select_db(DB)) {
-				echo "<br><span>" . lang('Schema') . ":</span> " . html_select("ns", array("" => "") + $adminer->schemas(), $_GET["ns"]) . $db_events;
+				echo "<br><span>" . lang('Schema') . ":</span> " . html_select("ns", array("" => "") + adminer()->schemas(), $_GET["ns"]) . $db_events;
 				if ($_GET["ns"] != "") {
 					set_schema($_GET["ns"]);
 				}
@@ -1069,10 +1068,9 @@ class Adminer {
 	* @param TableStatus[] $tables
 	*/
 	function tablesPrint(array $tables): void {
-		global $adminer;
 		echo "<ul id='tables'>" . script("mixin(qs('#tables'), {onmouseover: menuOver, onmouseout: menuOut});");
 		foreach ($tables as $table => $status) {
-			$name = $adminer->tableName($status);
+			$name = adminer()->tableName($status);
 			if ($name != "") {
 				echo '<li><a href="' . h(ME) . 'select=' . urlencode($table) . '"'
 					. bold($_GET["select"] == $table || $_GET["edit"] == $table, "select")
diff --git a/adminer/include/auth.inc.php b/adminer/include/auth.inc.php
index 7f9c56ca..3485fcdf 100644
--- a/adminer/include/auth.inc.php
+++ b/adminer/include/auth.inc.php
@@ -12,7 +12,6 @@ if ($_COOKIE["adminer_permanent"]) {
 }
 
 function add_invalid_login(): void {
-	global $adminer;
 	$base = get_temp_dir() . "/adminer.invalid";
 	// adminer.invalid may not be writable by us, try the files with random suffixes
 	foreach (glob("$base*") ?: array($base) as $filename) {
@@ -36,7 +35,7 @@ function add_invalid_login(): void {
 			}
 		}
 	}
-	$invalid = &$invalids[$adminer->bruteForceKey()];
+	$invalid = &$invalids[adminer()->bruteForceKey()];
 	if (!$invalid) {
 		$invalid = array($time + 30*60, 0); // active for 30 minutes
 	}
@@ -46,7 +45,6 @@ function add_invalid_login(): void {
 
 /** @param string[] $permanent */
 function check_invalid_login(array &$permanent): void {
-	global $adminer;
 	$invalids = array();
 	foreach (glob(get_temp_dir() . "/adminer.invalid*") as $filename) {
 		$fp = file_open_lock($filename);
@@ -57,7 +55,7 @@ function check_invalid_login(array &$permanent): void {
 		}
 	}
 	/** @var array{int, int} */
-	$invalid = idx($invalids, $adminer->bruteForceKey(), array());
+	$invalid = idx($invalids, adminer()->bruteForceKey(), array());
 	$next_attempt = ($invalid[1] > 29 ? $invalid[0] - time() : 0); // allow 30 invalid attempts
 	if ($next_attempt > 0) { //! do the same with permanent login
 		auth_error(lang('Too many unsuccessful logins, try again in %d minute(s).', ceil($next_attempt / 60)), $permanent);
@@ -76,7 +74,7 @@ if ($auth) {
 	$_SESSION["db"][$vendor][$server][$username][$db] = true;
 	if ($auth["permanent"]) {
 		$key = implode("-", array_map('base64_encode', array($vendor, $server, $username, $db)));
-		$private = $adminer->permanentLogin(true);
+		$private = adminer()->permanentLogin(true);
 		$permanent[$key] = "$key:" . base64_encode($private ? encrypt_string($password, $private) : "");
 		cookie("adminer_permanent", implode(" ", $permanent));
 	}
@@ -99,7 +97,7 @@ if ($auth) {
 
 } elseif ($permanent && !$_SESSION["pwds"]) {
 	session_regenerate_id();
-	$private = $adminer->permanentLogin();
+	$private = adminer()->permanentLogin();
 	foreach ($permanent as $key => $val) {
 		list(, $cipher) = explode(":", $val);
 		list($vendor, $server, $username, $db) = array_map('base64_decode', explode("-", $key));
@@ -127,7 +125,6 @@ function unset_permanent(array &$permanent): void {
 * @return never
 */
 function auth_error(string $error, array &$permanent) {
-	global $adminer;
 	$session_name = session_name();
 	if (isset($_GET["username"])) {
 		header("HTTP/1.1 403 Forbidden"); // 401 requires sending WWW-Authenticate header
@@ -158,7 +155,7 @@ function auth_error(string $error, array &$permanent) {
 		echo "<p class='message'>" . lang('The action will be performed after successful login with the same credentials.') . "\n";
 	}
 	echo "</div>\n";
-	$adminer->loginForm();
+	adminer()->loginForm();
 	echo "</form>\n";
 	page_footer("auth");
 	exit;
@@ -178,7 +175,7 @@ if (isset($_GET["username"]) && is_string(get_password())) {
 		auth_error(lang('Connecting to privileged ports is not allowed.'), $permanent);
 	}
 	check_invalid_login($permanent);
-	$connection = connect($adminer->credentials());
+	$connection = connect(adminer()->credentials());
 	if (is_object($connection)) {
 		$driver = new Driver($connection);
 		if ($connection->flavor) {
@@ -188,7 +185,7 @@ if (isset($_GET["username"]) && is_string(get_password())) {
 }
 
 $login = null;
-if (!is_object($connection) || ($login = $adminer->login($_GET["username"], get_password())) !== true) {
+if (!is_object($connection) || ($login = adminer()->login($_GET["username"], get_password())) !== true) {
 	$error = (is_string($connection) ? nl_br(h($connection)) : (is_string($login) ? $login : lang('Invalid credentials.')));
 	auth_error(
 		$error . (preg_match('~^ | $~', get_password()) ? '<br>' . lang('There is a space in the input password which might be the cause.') : ''),
diff --git a/adminer/include/bootstrap.inc.php b/adminer/include/bootstrap.inc.php
index 3ab140c0..28164cd8 100644
--- a/adminer/include/bootstrap.inc.php
+++ b/adminer/include/bootstrap.inc.php
@@ -39,7 +39,7 @@ if ($_GET["script"] == "version") {
 	exit;
 }
 
-global $adminer, $connection, $driver, $translations; // allows including Adminer inside a function
+global $connection, $driver, $translations; // allows including Adminer inside a function
 
 if (!$_SERVER["REQUEST_URI"]) { // IIS 5 compatibility
 	$_SERVER["REQUEST_URI"] = $_SERVER["ORIG_PATH_INFO"];
@@ -81,11 +81,11 @@ include "./include/adminer.inc.php";
 include "../adminer/include/plugins.inc.php";
 
 if (function_exists('adminer_object')) {
-	$adminer = adminer_object();
+	Adminer::$instance = adminer_object();
 } elseif (is_dir("adminer-plugins") || file_exists("adminer-plugins.php")) {
-	$adminer = new Plugins(null);
+	Adminer::$instance = new Plugins(null);
 } else {
-	$adminer = new Adminer;
+	Adminer::$instance = new Adminer;
 }
 
 // this is matched by compile.php
diff --git a/adminer/include/connect.inc.php b/adminer/include/connect.inc.php
index cf1cd61a..99221189 100644
--- a/adminer/include/connect.inc.php
+++ b/adminer/include/connect.inc.php
@@ -44,15 +44,15 @@ if (
 		}
 		echo "<p>" . lang('%s version: %s through PHP extension %s', get_driver(DRIVER), "<b>" . h($connection->server_info) . "</b>", "<b>$connection->extension</b>") . "\n";
 		echo "<p>" . lang('Logged as: %s', "<b>" . h(logged_user()) . "</b>") . "\n";
-		if (isset($adminer->plugins) && is_array($adminer->plugins)) {
+		if (isset(adminer()->plugins) && is_array(adminer()->plugins)) {
 			echo "<p>" . lang('Loaded plugins') . ":\n<ul>\n";
-			foreach ($adminer->plugins as $plugin) {
+			foreach (adminer()->plugins as $plugin) {
 				$reflection = new \ReflectionObject($plugin);
 				echo "<li><b>" . get_class($plugin) . "</b>" . h(preg_match('~^/[\s*]+(.+)~', $reflection->getDocComment(), $match) ? ": $match[1]" : "") . "\n";
 			}
 			echo "</ul>\n";
 		}
-		$databases = $adminer->databases();
+		$databases = adminer()->databases();
 		if ($databases) {
 			$scheme = support("scheme");
 			$collations = collations();
diff --git a/adminer/include/design.inc.php b/adminer/include/design.inc.php
index c4bcf682..0919a573 100644
--- a/adminer/include/design.inc.php
+++ b/adminer/include/design.inc.php
@@ -7,7 +7,6 @@ namespace Adminer;
 * @param string $title2 used after colon in title and heading, should be HTML escaped
 */
 function page_header(string $title, string $error = "", $breadcrumb = array(), string $title2 = ""): void {
-	global $adminer;
 	page_headers();
 	if (is_ajax() && $error) {
 		page_messages($error);
@@ -17,7 +16,7 @@ function page_header(string $title, string $error = "", $breadcrumb = array(), s
 		ob_start(null, 4096);
 	}
 	$title_all = $title . ($title2 != "" ? ": $title2" : "");
-	$title_page = strip_tags($title_all . (SERVER != "" && SERVER != "localhost" ? h(" - " . SERVER) : "") . " - " . $adminer->name());
+	$title_page = strip_tags($title_all . (SERVER != "" && SERVER != "localhost" ? h(" - " . SERVER) : "") . " - " . adminer()->name());
 	// initial-scale=1 is the default but Chrome 134 on iOS is not able to zoom out without it
 	?>
 <!DOCTYPE html>
@@ -28,7 +27,7 @@ function page_header(string $title, string $error = "", $breadcrumb = array(), s
 <title><?php echo $title_page; ?></title>
 <link rel="stylesheet" href="../adminer/static/default.css">
 <?php
-	$css = $adminer->css();
+	$css = adminer()->css();
 	$has_light = false;
 	$has_dark = false;
 	foreach ($css as $filename) {
@@ -51,7 +50,7 @@ function page_header(string $title, string $error = "", $breadcrumb = array(), s
 	// this is matched by compile.php
 	echo script_src("../adminer/static/functions.js");
 	echo script_src("static/editing.js");
-	if ($adminer->head($dark)) {
+	if (adminer()->head($dark)) {
 		echo "<link rel='shortcut icon' type='image/x-icon' href='../adminer/static/favicon.ico'>\n";
 		echo "<link rel='apple-touch-icon' href='../adminer/static/favicon.ico'>\n";
 	}
@@ -91,7 +90,7 @@ const thousandsSeparator = '" . js_escape(lang(',')) . "';")
 		$link = substr(preg_replace('~\b(username|db|ns)=[^&]*&~', '', ME), 0, -1);
 		echo '<p id="breadcrumb"><a href="' . h($link ?: ".") . '">' . get_driver(DRIVER) . '</a> » ';
 		$link = substr(preg_replace('~\b(db|ns)=[^&]*&~', '', ME), 0, -1);
-		$server = $adminer->serverName(SERVER);
+		$server = adminer()->serverName(SERVER);
 		$server = ($server != "" ? $server : lang('Server'));
 		if ($breadcrumb === false) {
 			echo "$server\n";
@@ -128,21 +127,20 @@ const thousandsSeparator = '" . js_escape(lang(',')) . "';")
 
 /** Send HTTP headers */
 function page_headers(): void {
-	global $adminer;
 	header("Content-Type: text/html; charset=utf-8");
 	header("Cache-Control: no-cache");
 	header("X-Frame-Options: deny"); // ClickJacking protection in IE8, Safari 4, Chrome 2, Firefox 3.6.9
 	header("X-XSS-Protection: 0"); // prevents introducing XSS in IE8 by removing safe parts of the page
 	header("X-Content-Type-Options: nosniff");
 	header("Referrer-Policy: origin-when-cross-origin");
-	foreach ($adminer->csp() as $csp) {
+	foreach (adminer()->csp() as $csp) {
 		$header = array();
 		foreach ($csp as $key => $val) {
 			$header[] = "$key $val";
 		}
 		header("Content-Security-Policy: " . implode("; ", $header));
 	}
-	$adminer->headers();
+	adminer()->headers();
 }
 
 /** Get Content Security Policy headers
@@ -174,7 +172,6 @@ function get_nonce(): string {
 
 /** Print flash and error messages */
 function page_messages(string $error): void {
-	global $adminer;
 	$uri = preg_replace('~^[^?]*~', '', $_SERVER["REQUEST_URI"]);
 	$messages = idx($_SESSION["messages"], $uri);
 	if ($messages) {
@@ -184,8 +181,8 @@ function page_messages(string $error): void {
 	if ($error) {
 		echo "<div class='error'>$error</div>\n";
 	}
-	if ($adminer->error) { // separate <div>
-		echo "<div class='error'>$adminer->error</div>\n";
+	if (adminer()->error) { // separate <div>
+		echo "<div class='error'>" . adminer()->error . "</div>\n";
 	}
 }
 
@@ -193,9 +190,8 @@ function page_messages(string $error): void {
 * @param ''|'auth'|'db'|'ns' $missing
 */
 function page_footer(string $missing = ""): void {
-	global $adminer;
 	echo "</div>\n\n<div id='foot' class='foot'>\n<div id='menu'>\n";
-	$adminer->navigation($missing);
+	adminer()->navigation($missing);
 	echo "</div>\n";
 	if ($missing != "auth") {
 		?>
diff --git a/adminer/include/driver.inc.php b/adminer/include/driver.inc.php
index d98c6794..f122e0e0 100644
--- a/adminer/include/driver.inc.php
+++ b/adminer/include/driver.inc.php
@@ -63,19 +63,18 @@ abstract class SqlDriver {
 	}
 
 	/** Select data from table
-	* @param list<string> $select result of $adminer->selectColumnsProcess()[0]
-	* @param list<string> $where result of $adminer->selectSearchProcess()
-	* @param list<string> $group result of $adminer->selectColumnsProcess()[1]
-	* @param list<string> $order result of $adminer->selectOrderProcess()
-	* @param int|numeric-string $limit result of $adminer->selectLimitProcess()
+	* @param list<string> $select result of adminer()->selectColumnsProcess()[0]
+	* @param list<string> $where result of adminer()->selectSearchProcess()
+	* @param list<string> $group result of adminer()->selectColumnsProcess()[1]
+	* @param list<string> $order result of adminer()->selectOrderProcess()
+	* @param int|numeric-string $limit result of adminer()->selectLimitProcess()
 	* @param int $page index of page starting at zero
 	* @param bool $print whether to print the query
 	* @return Result|false
 	*/
 	function select(string $table, array $select, array $where, array $group, array $order = array(), $limit = 1, ?int $page = 0, bool $print = false) {
-		global $adminer;
 		$is_group = (count($group) < count($select));
-		$query = $adminer->selectQueryBuild($select, $where, $group, $order, $limit, $page);
+		$query = adminer()->selectQueryBuild($select, $where, $group, $order, $limit, $page);
 		if (!$query) {
 			$query = "SELECT" . limit(
 				($_GET["page"] != "last" && $limit != "" && $group && $is_group && JUSH == "sql" ? "SQL_CALC_FOUND_ROWS " : "") . implode(", ", $select) . "\nFROM " . table($table),
@@ -88,7 +87,7 @@ abstract class SqlDriver {
 		$start = microtime(true);
 		$return = $this->conn->query($query);
 		if ($print) {
-			echo $adminer->selectQuery($query, $start, !$return);
+			echo adminer()->selectQuery($query, $start, !$return);
 		}
 		return $return;
 	}
diff --git a/adminer/include/functions.inc.php b/adminer/include/functions.inc.php
index c8fbf48d..80c40678 100644
--- a/adminer/include/functions.inc.php
+++ b/adminer/include/functions.inc.php
@@ -14,8 +14,7 @@ function connection(): Db {
 * @return Adminer|Plugins
 */
 function adminer() {
-	global $adminer;
-	return $adminer;
+	return Adminer::$instance;
 }
 
 /** Get Driver object */
@@ -432,15 +431,15 @@ function redirect(?string $location, string $message = null): void {
 * @param bool $redirect
 */
 function query_redirect(string $query, ?string $location, string $message, $redirect = true, bool $execute = true, bool $failed = false, string $time = ""): bool {
-	global $connection, $adminer;
+	global $connection;
 	if ($execute) {
 		$start = microtime(true);
 		$failed = !$connection->query($query);
 		$time = format_time($start);
 	}
-	$sql = ($query ? $adminer->messageQuery($query, $time, $failed) : "");
+	$sql = ($query ? adminer()->messageQuery($query, $time, $failed) : "");
 	if ($failed) {
-		$adminer->error .= error() . $sql . script("messagesPrint();") . "<br>";
+		adminer()->error .= error() . $sql . script("messagesPrint();") . "<br>";
 		return false;
 	}
 	if ($redirect) {
@@ -589,9 +588,8 @@ function table_status1(string $table, bool $fast = false): array {
 * @return list<ForeignKey>[] [$col => []]
 */
 function column_foreign_keys(string $table): array {
-	global $adminer;
 	$return = array();
-	foreach ($adminer->foreignKeys($table) as $foreign_key) {
+	foreach (adminer()->foreignKeys($table) as $foreign_key) {
 		foreach ($foreign_key["source"] as $val) {
 			$return[$val][] = $foreign_key;
 		}
@@ -628,11 +626,10 @@ function fields_from_edit(): array { // used by Mongo and SimpleDB
 * @return string extension
 */
 function dump_headers(string $identifier, bool $multi_table = false): string {
-	global $adminer;
-	$return = $adminer->dumpHeaders($identifier, $multi_table);
+	$return = adminer()->dumpHeaders($identifier, $multi_table);
 	$output = $_POST["output"];
 	if ($output != "text") {
-		header("Content-Disposition: attachment; filename=" . $adminer->dumpFilename($identifier) . ".$return" . ($output != "file" && preg_match('~^[0-9a-z]+$~', $output) ? ".$output" : ""));
+		header("Content-Disposition: attachment; filename=" . adminer()->dumpFilename($identifier) . ".$return" . ($output != "file" && preg_match('~^[0-9a-z]+$~', $output) ? ".$output" : ""));
 	}
 	session_write_close();
 	if (!ob_get_level()) {
@@ -762,7 +759,6 @@ function rand_string(): string {
 * @return string HTML
 */
 function select_value($val, string $link, array $field, ?string $text_length): string {
-	global $adminer;
 	if (is_array($val)) {
 		$return = "";
 		foreach ($val as $k => $v) {
@@ -774,7 +770,7 @@ function select_value($val, string $link, array $field, ?string $text_length): s
 		return "<table>$return</table>";
 	}
 	if (!$link) {
-		$link = $adminer->selectLink($val, $field);
+		$link = adminer()->selectLink($val, $field);
 	}
 	if ($link === null) {
 		if (is_mail($val)) {
@@ -784,7 +780,7 @@ function select_value($val, string $link, array $field, ?string $text_length): s
 			$link = $val; // IE 11 and all modern browsers hide referrer
 		}
 	}
-	$return = $adminer->editVal($val, $field);
+	$return = adminer()->editVal($val, $field);
 	if ($return !== null) {
 		if (!is_utf8($return)) {
 			$return = "\0"; // htmlspecialchars of binary data returns an empty string
@@ -794,7 +790,7 @@ function select_value($val, string $link, array $field, ?string $text_length): s
 			$return = h($return);
 		}
 	}
-	return $adminer->selectVal($return, $link, $field, $val);
+	return adminer()->selectVal($return, $link, $field, $val);
 }
 
 /** Check whether the string is e-mail address */
@@ -834,13 +830,13 @@ function count_rows(string $table, array $where, bool $is_group, array $group):
 * @return string[]
 */
 function slow_query(string $query): array {
-	global $adminer, $driver;
-	$db = $adminer->database();
-	$timeout = $adminer->queryTimeout();
+	global $driver;
+	$db = adminer()->database();
+	$timeout = adminer()->queryTimeout();
 	$slow_query = $driver->slowQuery($query, $timeout);
 	$connection2 = null;
 	if (!$slow_query && support("kill")) {
-		$connection2 = connect($adminer->credentials());
+		$connection2 = connect(adminer()->credentials());
 		if (is_object($connection2) && ($db == "" || $connection2->select_db($db))) {
 			$kill = get_val(connection_id(), 0, $connection2); // MySQL and MySQLi can use thread_id but it's not in PDO_MySQL
 			echo script("const timeout = setTimeout(() => { ajax('" . js_escape(ME) . "script=kill', function () {}, 'kill=$kill&token=" . get_token() . "'); }, 1000 * $timeout);");
diff --git a/adminer/include/html.inc.php b/adminer/include/html.inc.php
index 2f804d52..b897bde9 100644
--- a/adminer/include/html.inc.php
+++ b/adminer/include/html.inc.php
@@ -174,13 +174,12 @@ function hidden_fields_get(): void {
 * @param mixed $value string|array
 */
 function enum_input(string $type, string $attrs, array $field, $value, string $empty = null): string {
-	global $adminer;
 	preg_match_all("~'((?:[^']|'')*)'~", $field["length"], $matches);
 	$return = ($empty !== null ? "<label><input type='$type'$attrs value='$empty'" . ((is_array($value) ? in_array($empty, $value) : $value === $empty) ? " checked" : "") . "><i>" . lang('empty') . "</i></label>" : "");
 	foreach ($matches[1] as $i => $val) {
 		$val = stripcslashes(str_replace("''", "'", $val));
 		$checked = (is_array($value) ? in_array($val, $value) : $value === $val);
-		$return .= " <label><input type='$type'$attrs value='" . h($val) . "'" . ($checked ? ' checked' : '') . '>' . h($adminer->editVal($val, $field)) . '</label>';
+		$return .= " <label><input type='$type'$attrs value='" . h($val) . "'" . ($checked ? ' checked' : '') . '>' . h(adminer()->editVal($val, $field)) . '</label>';
 	}
 	return $return;
 }
@@ -190,7 +189,7 @@ function enum_input(string $type, string $attrs, array $field, $value, string $e
 * @param mixed $value
 */
 function input(array $field, $value, ?string $function, ?bool $autofocus = false): void {
-	global $driver, $adminer;
+	global $driver;
 	$name = h(bracket_escape($field["field"]));
 	echo "<td class='function'>";
 	if (is_array($value) && !$function) {
@@ -201,7 +200,7 @@ function input(array $field, $value, ?string $function, ?bool $autofocus = false
 	if ($reset && !$_POST["save"]) {
 		$function = null;
 	}
-	$functions = (isset($_GET["select"]) || $reset ? array("orig" => lang('original')) : array()) + $adminer->editFunctions($field);
+	$functions = (isset($_GET["select"]) || $reset ? array("orig" => lang('original')) : array()) + adminer()->editFunctions($field);
 	$disabled = stripos($field["default"], "GENERATED ALWAYS AS ") === 0 ? " disabled=''" : "";
 	$attrs = " name='fields[$name]'$disabled" . ($autofocus ? " autofocus" : "");
 	$enums = $driver->enumLength($field);
@@ -212,7 +211,7 @@ function input(array $field, $value, ?string $function, ?bool $autofocus = false
 	echo $driver->unconvertFunction($field) . " ";
 	$table = $_GET["edit"] ?: $_GET["select"];
 	if ($field["type"] == "enum") {
-		echo h($functions[""]) . "<td>" . $adminer->editInput($table, $field, $attrs, $value);
+		echo h($functions[""]) . "<td>" . adminer()->editInput($table, $field, $attrs, $value);
 	} else {
 		$has_function = (in_array($function, $functions) || isset($functions[$function]));
 		echo (count($functions) > 1
@@ -221,7 +220,7 @@ function input(array $field, $value, ?string $function, ?bool $autofocus = false
 				. script("qsl('select').onchange = functionChange;", "")
 			: h(reset($functions))
 		) . '<td>';
-		$input = $adminer->editInput($table, $field, $attrs, $value); // usage in call is without a table
+		$input = adminer()->editInput($table, $field, $attrs, $value); // usage in call is without a table
 		if ($input != "") {
 			echo $input;
 		} elseif (preg_match('~bool~', $field["type"])) {
@@ -232,7 +231,7 @@ function input(array $field, $value, ?string $function, ?bool $autofocus = false
 			foreach ($matches[1] as $i => $val) {
 				$val = stripcslashes(str_replace("''", "'", $val));
 				$checked = in_array($val, explode(",", $value), true);
-				echo " <label><input type='checkbox' name='fields[$name][$i]' value='" . h($val) . "'" . ($checked ? ' checked' : '') . ">" . h($adminer->editVal($val, $field)) . '</label>';
+				echo " <label><input type='checkbox' name='fields[$name][$i]' value='" . h($val) . "'" . ($checked ? ' checked' : '') . ">" . h(adminer()->editVal($val, $field)) . '</label>';
 			}
 		} elseif (preg_match('~blob|bytea|raw|file~', $field["type"]) && ini_bool("file_uploads")) {
 			echo "<input type='file' name='fields-$name'>";
@@ -264,7 +263,7 @@ function input(array $field, $value, ?string $function, ?bool $autofocus = false
 				. "$attrs>"
 			;
 		}
-		echo $adminer->editHint($table, $field, $value);
+		echo adminer()->editHint($table, $field, $value);
 		// skip 'original'
 		$first = 0;
 		foreach ($functions as $key => $val) {
@@ -284,7 +283,7 @@ function input(array $field, $value, ?string $function, ?bool $autofocus = false
 * @return mixed false to leave the original value
 */
 function process_input(array $field) {
-	global $adminer, $driver;
+	global $driver;
 	if (stripos($field["default"], "GENERATED ALWAYS AS ") === 0) {
 		return;
 	}
@@ -326,7 +325,7 @@ function process_input(array $field) {
 		}
 		return $driver->quoteBinary($file);
 	}
-	return $adminer->processInput($field, $value, $function);
+	return adminer()->processInput($field, $value, $function);
 }
 
 /** Print results of search in all tables
@@ -334,13 +333,13 @@ function process_input(array $field) {
 * @uses $_POST["tables"]
 */
 function search_tables(): void {
-	global $adminer, $connection;
+	global $connection;
 	$_GET["where"][0]["val"] = $_POST["query"];
 	$sep = "<ul>\n";
 	foreach (table_status('', true) as $table => $table_status) {
-		$name = $adminer->tableName($table_status);
+		$name = adminer()->tableName($table_status);
 		if (isset($table_status["Engine"]) && $name != "" && (!$_POST["tables"] || in_array($table, $_POST["tables"]))) {
-			$result = $connection->query("SELECT" . limit("1 FROM " . table($table), " WHERE " . implode(" AND ", $adminer->selectSearchProcess(fields($table), array())), 1));
+			$result = $connection->query("SELECT" . limit("1 FROM " . table($table), " WHERE " . implode(" AND ", adminer()->selectSearchProcess(fields($table), array())), 1));
 			if (!$result || $result->fetch_row()) {
 				$print = "<a href='" . h(ME . "select=" . urlencode($table) . "&where[0][op]=" . urlencode($_GET["where"][0]["op"]) . "&where[0][val]=" . urlencode($_GET["where"][0]["val"])) . "'>$name</a>";
 				echo "$sep<li>" . ($result ? $print : "<p class='error'>$print: " . error()) . "\n";
@@ -364,15 +363,14 @@ function on_help(string $command, int $side = 0): string {
 * @param mixed $row
 */
 function edit_form(string $table, array $fields, $row, ?bool $update, string $error = ''): void {
-	global $adminer;
-	$table_name = $adminer->tableName(table_status1($table, true));
+	$table_name = adminer()->tableName(table_status1($table, true));
 	page_header(
 		($update ? lang('Edit') : lang('Insert')),
 		$error,
 		array("select" => array($table, $table_name)),
 		$table_name
 	);
-	$adminer->editRowPrint($table, $fields, $row, $update);
+	adminer()->editRowPrint($table, $fields, $row, $update);
 	if ($row === false) {
 		echo "<p class='error'>" . lang('No rows.') . "\n";
 		return;
@@ -384,7 +382,7 @@ function edit_form(string $table, array $fields, $row, ?bool $update, string $er
 		echo "<table class='layout'>" . script("qsl('table').onkeydown = editingKeydown;");
 		$autofocus = !$_POST;
 		foreach ($fields as $name => $field) {
-			echo "<tr><th>" . $adminer->fieldName($field);
+			echo "<tr><th>" . adminer()->fieldName($field);
 			$default = idx($_GET["set"], bracket_escape($name));
 			if ($default === null) {
 				$default = $field["default"];
@@ -406,7 +404,7 @@ function edit_form(string $table, array $fields, $row, ?bool $update, string $er
 				)
 			);
 			if (!$_POST["save"] && is_string($value)) {
-				$value = $adminer->editVal($value, $field);
+				$value = adminer()->editVal($value, $field);
 			}
 			$function = ($_POST["save"]
 				? idx($_POST["function"], $name, "")
@@ -439,7 +437,7 @@ function edit_form(string $table, array $fields, $row, ?bool $update, string $er
 			echo "<tr>"
 				. "<th><input name='field_keys[]'>"
 				. script("qsl('input').oninput = fieldChange;")
-				. "<td class='function'>" . html_select("field_funs[]", $adminer->editFunctions(array("null" => isset($_GET["select"]))))
+				. "<td class='function'>" . html_select("field_funs[]", adminer()->editFunctions(array("null" => isset($_GET["select"]))))
 				. "<td><input name='field_vals[]'>"
 				. "\n"
 			;
diff --git a/adminer/schema.inc.php b/adminer/schema.inc.php
index b3ab4e41..b677514b 100644
--- a/adminer/schema.inc.php
+++ b/adminer/schema.inc.php
@@ -31,7 +31,7 @@ foreach (table_status('', true) as $table => $table_status) {
 		$schema[$table]["fields"][$name] = $field;
 	}
 	$schema[$table]["pos"] = ($table_pos[$table] ?: array($top, 0));
-	foreach ($adminer->foreignKeys($table) as $val) {
+	foreach (adminer()->foreignKeys($table) as $val) {
 		if (!$val["db"]) {
 			$left = $base_left;
 			if (idx($table_pos[$table], 1) || idx($table_pos[$val["table"]], 1)) {
diff --git a/adminer/script.inc.php b/adminer/script.inc.php
index c5fb950f..35b981c6 100644
--- a/adminer/script.inc.php
+++ b/adminer/script.inc.php
@@ -39,7 +39,7 @@ if ($_GET["script"] == "db") {
 	$connection->query("KILL " . number($_POST["kill"]));
 
 } else { // connect
-	foreach (count_tables($adminer->databases()) as $db => $val) {
+	foreach (count_tables(adminer()->databases()) as $db => $val) {
 		json_row("tables-$db", $val);
 		json_row("size-$db", db_size($db));
 	}
diff --git a/adminer/select.inc.php b/adminer/select.inc.php
index b71656aa..b9ce4d8c 100644
--- a/adminer/select.inc.php
+++ b/adminer/select.inc.php
@@ -15,12 +15,12 @@ $search_columns = array(); // searchable columns
 $order_columns = array(); // searchable columns
 $text_length = "";
 foreach ($fields as $key => $field) {
-	$name = $adminer->fieldName($field);
+	$name = adminer()->fieldName($field);
 	$name_plain = html_entity_decode(strip_tags($name), ENT_QUOTES);
 	if (isset($field["privileges"]["select"]) && $name != "") {
 		$columns[$key] = $name_plain;
 		if (is_shortable($field)) {
-			$text_length = $adminer->selectLengthProcess();
+			$text_length = adminer()->selectLengthProcess();
 		}
 	}
 	if (isset($field["privileges"]["where"]) && $name != "") {
@@ -32,13 +32,13 @@ foreach ($fields as $key => $field) {
 	$rights += $field["privileges"];
 }
 
-list($select, $group) = $adminer->selectColumnsProcess($columns, $indexes);
+list($select, $group) = adminer()->selectColumnsProcess($columns, $indexes);
 $select = array_unique($select);
 $group = array_unique($group);
 $is_group = count($group) < count($select);
-$where = $adminer->selectSearchProcess($fields, $indexes);
-$order = $adminer->selectOrderProcess($fields, $indexes);
-$limit = $adminer->selectLimitProcess();
+$where = adminer()->selectSearchProcess($fields, $indexes);
+$order = adminer()->selectOrderProcess($fields, $indexes);
+$limit = adminer()->selectLimitProcess();
 
 if ($_GET["val"] && is_ajax()) {
 	header("Content-Type: text/plain; charset=utf-8");
@@ -85,7 +85,7 @@ if ($_POST && !$error) {
 	if ($_POST["export"]) {
 		save_settings(array("output" => $_POST["output"], "format" => $_POST["format"]), "adminer_import");
 		dump_headers($TABLE);
-		$adminer->dumpTable($TABLE, "");
+		adminer()->dumpTable($TABLE, "");
 		$from = ($select ? implode(", ", $select) : "*")
 			. convert_fields($columns, $fields, $select)
 			. "\nFROM " . table($TABLE);
@@ -99,12 +99,12 @@ if ($_POST && !$error) {
 			}
 			$query = implode(" UNION ALL ", $union);
 		}
-		$adminer->dumpData($TABLE, "table", $query);
-		$adminer->dumpFooter();
+		adminer()->dumpData($TABLE, "table", $query);
+		adminer()->dumpFooter();
 		exit;
 	}
 
-	if (!$adminer->selectEmailProcess($where, $foreign_keys)) {
+	if (!adminer()->selectEmailProcess($where, $foreign_keys)) {
 		if ($_POST["save"] || $_POST["delete"]) { // edit
 			$result = true;
 			$affected = 0;
@@ -174,7 +174,7 @@ if ($_POST && !$error) {
 					$set = array();
 					foreach ($row as $key => $val) {
 						$key = bracket_escape($key, true); // true - back
-						$set[idf_escape($key)] = (preg_match('~char|text~', $fields[$key]["type"]) || $val != "" ? $adminer->processInput($fields[$key], $val) : "NULL");
+						$set[idf_escape($key)] = (preg_match('~char|text~', $fields[$key]["type"]) || $val != "" ? adminer()->processInput($fields[$key], $val) : "NULL");
 					}
 					$result = $driver->update(
 						$TABLE,
@@ -229,7 +229,7 @@ if ($_POST && !$error) {
 	}
 }
 
-$table_name = $adminer->tableName($table_status);
+$table_name = adminer()->tableName($table_status);
 if (is_ajax()) {
 	page_headers();
 	ob_start();
@@ -251,7 +251,7 @@ if (isset($rights["insert"]) || !support("table")) {
 
 	$set = $params ? "&" . http_build_query($params) : "";
 }
-$adminer->selectLinks($table_status, $set);
+adminer()->selectLinks($table_status, $set);
 
 if (!$columns && support("table")) {
 	echo "<p class='error'>" . lang('Unable to select the table') . ($fields ? "." : ": " . error()) . "\n";
@@ -262,12 +262,12 @@ if (!$columns && support("table")) {
 	echo (DB != "" ? input_hidden("db", DB) . (isset($_GET["ns"]) ? input_hidden("ns", $_GET["ns"]) : "") : ""); // not used in Editor
 	echo input_hidden("select", $TABLE);
 	echo "</div>\n";
-	$adminer->selectColumnsPrint($select, $columns);
-	$adminer->selectSearchPrint($where, $search_columns, $indexes);
-	$adminer->selectOrderPrint($order, $order_columns, $indexes);
-	$adminer->selectLimitPrint($limit);
-	$adminer->selectLengthPrint($text_length);
-	$adminer->selectActionPrint($indexes);
+	adminer()->selectColumnsPrint($select, $columns);
+	adminer()->selectSearchPrint($where, $search_columns, $indexes);
+	adminer()->selectOrderPrint($order, $order_columns, $indexes);
+	adminer()->selectLimitPrint($limit);
+	adminer()->selectLengthPrint($text_length);
+	adminer()->selectActionPrint($indexes);
 	echo "</form>\n";
 
 	$page = $_GET["page"];
@@ -325,7 +325,7 @@ if (!$columns && support("table")) {
 		if (!$rows) {
 			echo "<p class='message'>" . lang('No rows.') . "\n";
 		} else {
-			$backward_keys = $adminer->backwardKeys($TABLE, $table_name);
+			$backward_keys = adminer()->backwardKeys($TABLE, $table_name);
 
 			echo "<div class='scrollable'>";
 			echo "<table id='table' class='nowrap checkable odds'>";
@@ -343,7 +343,7 @@ if (!$columns && support("table")) {
 					/** @var array{fun?:string, col?:string} */
 					$val = idx($_GET["columns"], key($select)) ?: array();
 					$field = $fields[$select ? ($val ? $val["col"] : current($select)) : $key];
-					$name = ($field ? $adminer->fieldName($field, $rank) : ($val["fun"] ? "*" : h($key)));
+					$name = ($field ? adminer()->fieldName($field, $rank) : ($val["fun"] ? "*" : h($key)));
 					if ($name != "") {
 						$rank++;
 						$names[$key] = $name;
@@ -384,7 +384,7 @@ if (!$columns && support("table")) {
 				ob_end_clean();
 			}
 
-			foreach ($adminer->rowDescriptions($rows, $foreign_keys) as $n => $row) {
+			foreach (adminer()->rowDescriptions($rows, $foreign_keys) as $n => $row) {
 				$unique_array = unique_array($rows[$n], $indexes);
 				if (!$unique_array) {
 					$unique_array = array();
@@ -472,7 +472,7 @@ if (!$columns && support("table")) {
 				if ($backward_keys) {
 					echo "<td>";
 				}
-				$adminer->backwardKeysPrint($backward_keys, $rows[$n]);
+				adminer()->backwardKeysPrint($backward_keys, $rows[$n]);
 				echo "</tr>\n"; // close to allow white-space: pre
 			}
 
@@ -549,7 +549,7 @@ if (!$columns && support("table")) {
 				echo checkbox("all", 1, 0, ($found_rows !== false ? ($exact_count ? "" : "~ ") . lang('%d row(s)', $found_rows) : ""), $onclick) . "\n";
 				echo "</fieldset>\n";
 
-				if ($adminer->selectCommandPrint()) {
+				if (adminer()->selectCommandPrint()) {
 					?>
 <fieldset<?php echo ($_GET["modify"] ? '' : ' class="jsonly"'); ?>><legend><?php echo lang('Modify'); ?></legend><div>
 <input type="submit" value="<?php echo lang('Save'); ?>"<?php echo ($_GET["modify"] ? '' : ' title="' . lang('Ctrl+click on a value to modify it.') . '"'); ?>>
@@ -562,7 +562,7 @@ if (!$columns && support("table")) {
 <?php
 				}
 
-				$format = $adminer->dumpFormat();
+				$format = adminer()->dumpFormat();
 				foreach ((array) $_GET["columns"] as $column) {
 					if ($column["fun"]) {
 						unset($format['sql']);
@@ -571,18 +571,18 @@ if (!$columns && support("table")) {
 				}
 				if ($format) {
 					print_fieldset("export", lang('Export') . " <span id='selected2'></span>");
-					$output = $adminer->dumpOutput();
+					$output = adminer()->dumpOutput();
 					echo ($output ? html_select("output", $output, $adminer_import["output"]) . " " : "");
 					echo html_select("format", $format, $adminer_import["format"]);
 					echo " <input type='submit' name='export' value='" . lang('Export') . "'>\n";
 					echo "</div></fieldset>\n";
 				}
 
-				$adminer->selectEmailPrint(array_filter($email_fields, 'strlen'), $columns);
+				adminer()->selectEmailPrint(array_filter($email_fields, 'strlen'), $columns);
 				echo "</div></div>\n";
 			}
 
-			if ($adminer->selectImportPrint()) {
+			if (adminer()->selectImportPrint()) {
 				echo "<div>";
 				echo "<a href='#import'>" . lang('Import') . "</a>";
 				echo script("qsl('a').onclick = partial(toggle, 'import');", "");
diff --git a/adminer/sql.inc.php b/adminer/sql.inc.php
index 25dd0ce4..ce9867d0 100644
--- a/adminer/sql.inc.php
+++ b/adminer/sql.inc.php
@@ -4,9 +4,9 @@ namespace Adminer;
 if (!$error && $_POST["export"]) {
 	save_settings(array("output" => $_POST["output"], "format" => $_POST["format"]), "adminer_import");
 	dump_headers("sql");
-	$adminer->dumpTable("", "");
-	$adminer->dumpData("", "table", $_POST["query"]);
-	$adminer->dumpFooter();
+	adminer()->dumpTable("", "");
+	adminer()->dumpData("", "table", $_POST["query"]);
+	adminer()->dumpFooter();
 	exit;
 }
 
@@ -25,7 +25,7 @@ if (!$error && $_POST) {
 	if (!isset($_GET["import"])) {
 		$query = $_POST["query"];
 	} elseif ($_POST["webfile"]) {
-		$sql_file_path = $adminer->importServerPath();
+		$sql_file_path = adminer()->importServerPath();
 		$fp = @fopen((file_exists($sql_file_path)
 			? $sql_file_path
 			: "compress.zlib://$sql_file_path.gz"
@@ -54,7 +54,7 @@ if (!$error && $_POST) {
 		$delimiter = ";";
 		$offset = 0;
 		$empty = true;
-		$connection2 = connect($adminer->credentials()); // connection for exploring indexes and EXPLAIN (to not replace FOUND_ROWS()) //! PDO - silent error
+		$connection2 = connect(adminer()->credentials()); // connection for exploring indexes and EXPLAIN (to not replace FOUND_ROWS()) //! PDO - silent error
 		if (is_object($connection2) && DB != "") {
 			$connection2->select_db(DB);
 			if ($_GET["ns"] != "") {
@@ -66,7 +66,7 @@ if (!$error && $_POST) {
 		$parse = '[\'"' . (JUSH == "sql" ? '`#' : (JUSH == "sqlite" ? '`[' : (JUSH == "mssql" ? '[' : ''))) . ']|/\*|-- |$' . (JUSH == "pgsql" ? '|\$[^$]*\$' : '');
 		$total_start = microtime(true);
 		$adminer_export = get_settings("adminer_import"); // this doesn't offer SQL export so we match the import/export style at select
-		$dump_format = $adminer->dumpFormat();
+		$dump_format = adminer()->dumpFormat();
 		unset($dump_format["sql"]);
 
 		while ($query != "") {
@@ -109,7 +109,7 @@ if (!$error && $_POST) {
 						$empty = false;
 						$q = substr($query, 0, $pos);
 						$commands++;
-						$print = "<pre id='sql-$commands'><code class='jush-" . JUSH . "'>" . $adminer->sqlCommandQuery($q) . "</code></pre>\n";
+						$print = "<pre id='sql-$commands'><code class='jush-" . JUSH . "'>" . adminer()->sqlCommandQuery($q) . "</code></pre>\n";
 						if (JUSH == "sqlite" && preg_match("~^$space*+ATTACH\\b~i", $q, $match)) {
 							// PHP doesn't support setting SQLITE_LIMIT_ATTACHED
 							echo $print;
@@ -167,7 +167,7 @@ if (!$error && $_POST) {
 											}
 											$id = "export-$commands";
 											echo ", <a href='#$id'>" . lang('Export') . "</a>" . script("qsl('a').onclick = partial(toggle, '$id');", "") . "<span id='$id' class='hidden'>: "
-												. html_select("output", $adminer->dumpOutput(), $adminer_export["output"]) . " "
+												. html_select("output", adminer()->dumpOutput(), $adminer_export["output"]) . " "
 												. html_select("format", $dump_format, $adminer_export["format"])
 												. input_hidden("query", $q)
 												. "<input type='submit' name='export' value='" . lang('Export') . "'>" . input_token() . "</span>\n"
@@ -237,7 +237,7 @@ if (!isset($_GET["import"])) {
 	textarea("query", $q, 20);
 	echo script(($_POST ? "" : "qs('textarea').focus();\n") . "qs('#form').onsubmit = partial(sqlSubmit, qs('#form'), '" . js_escape(remove_from_uri("sql|limit|error_stops|only_errors|history")) . "');");
 	echo "<p>";
-	$adminer->sqlPrintAfter();
+	adminer()->sqlPrintAfter();
 	echo "$execute\n";
 	echo lang('Limit rows') . ": <input type='number' name='limit' class='size' value='" . h($_POST ? $_POST["limit"] : $_GET["limit"]) . "'>\n";
 
@@ -249,7 +249,7 @@ if (!isset($_GET["import"])) {
 		: lang('File uploads are disabled.')
 	);
 	echo "</div></fieldset>\n";
-	$importServerPath = $adminer->importServerPath();
+	$importServerPath = adminer()->importServerPath();
 	if ($importServerPath) {
 		echo "<fieldset><legend>" . lang('From server') . "</legend><div>";
 		echo lang('Webserver file %s', "<code>" . h($importServerPath) . "$gz</code>");
diff --git a/adminer/table.inc.php b/adminer/table.inc.php
index 5c2c1bb4..bd65acac 100644
--- a/adminer/table.inc.php
+++ b/adminer/table.inc.php
@@ -7,7 +7,7 @@ if (!$fields) {
 	$error = error() ?: lang('No tables.');
 }
 $table_status = table_status1($TABLE);
-$name = $adminer->tableName($table_status);
+$name = adminer()->tableName($table_status);
 
 page_header(($fields && is_view($table_status) ? $table_status['Engine'] == 'materialized view' ? lang('Materialized view') : lang('View') : lang('Table')) . ": " . ($name != "" ? $name : h($TABLE)), $error);
 
@@ -15,7 +15,7 @@ $rights = array();
 foreach ($fields as $key => $field) {
 	$rights += $field["privileges"];
 }
-$adminer->selectLinks($table_status, (isset($rights["insert"]) || !support("table") ? "" : null));
+adminer()->selectLinks($table_status, (isset($rights["insert"]) || !support("table") ? "" : null));
 
 $comment = $table_status["Comment"];
 if ($comment != "") {
@@ -23,14 +23,14 @@ if ($comment != "") {
 }
 
 if ($fields) {
-	$adminer->tableStructurePrint($fields, $table_status);
+	adminer()->tableStructurePrint($fields, $table_status);
 }
 
 if (support("indexes") && $driver->supportsIndex($table_status)) {
 	echo "<h3 id='indexes'>" . lang('Indexes') . "</h3>\n";
 	$indexes = indexes($TABLE);
 	if ($indexes) {
-		$adminer->tableIndexesPrint($indexes);
+		adminer()->tableIndexesPrint($indexes);
 	}
 	echo '<p class="links"><a href="' . h(ME) . 'indexes=' . urlencode($TABLE) . '">' . lang('Alter indexes') . "</a>\n";
 }
diff --git a/editor/db.inc.php b/editor/db.inc.php
index 1eb64524..094c362e 100644
--- a/editor/db.inc.php
+++ b/editor/db.inc.php
@@ -3,7 +3,7 @@ namespace Adminer;
 
 page_header(lang('Server'), "", false);
 
-if ($adminer->homepage()) {
+if (adminer()->homepage()) {
 	echo "<form action='' method='post'>\n";
 	echo "<p>" . lang('Search data in tables') . ": <input type='search' name='query' value='" . h($_POST["query"]) . "'> <input type='submit' value='" . lang('Search') . "'>\n";
 	if ($_POST["query"] != "") {
@@ -19,7 +19,7 @@ if ($adminer->homepage()) {
 	echo "</thead>\n";
 
 	foreach (table_status() as $table => $row) {
-		$name = $adminer->tableName($row);
+		$name = adminer()->tableName($row);
 		if ($name != "") {
 			echo '<tr><td>' . checkbox("tables[]", $table, in_array($table, (array) $_POST["tables"], true));
 			echo "<th><a href='" . h(ME) . 'select=' . urlencode($table) . "'>$name</a>";
diff --git a/editor/include/adminer.inc.php b/editor/include/adminer.inc.php
index 60a88ffb..6becf73b 100644
--- a/editor/include/adminer.inc.php
+++ b/editor/include/adminer.inc.php
@@ -2,6 +2,7 @@
 namespace Adminer;
 
 class Adminer {
+	static $instance;
 	public $error = '';
 	private $values = array();
 
@@ -30,9 +31,9 @@ class Adminer {
 	}
 
 	function database() {
-		global $connection, $adminer;
+		global $connection;
 		if ($connection) {
-			$databases = $adminer->databases(false);
+			$databases = adminer()->databases(false);
 			return (!$databases
 				? get_val("SELECT SUBSTRING_INDEX(CURRENT_USER, '@', 1)") // username without the database list
 				: $databases[(information_schema($databases[0]) ? 1 : 0)] // first available database
@@ -79,10 +80,9 @@ class Adminer {
 	}
 
 	function loginForm() {
-		global $adminer;
 		echo "<table class='layout'>\n";
-		echo $adminer->loginFormField('username', '<tr><th>' . lang('Username') . '<td>', input_hidden("auth[driver]", "server") . '<input name="auth[username]" autofocus value="' . h($_GET["username"]) . '" autocomplete="username" autocapitalize="off">');
-		echo $adminer->loginFormField('password', '<tr><th>' . lang('Password') . '<td>', '<input type="password" name="auth[password]" autocomplete="current-password">');
+		echo adminer()->loginFormField('username', '<tr><th>' . lang('Username') . '<td>', input_hidden("auth[driver]", "server") . '<input name="auth[username]" autofocus value="' . h($_GET["username"]) . '" autocomplete="username" autocapitalize="off">');
+		echo adminer()->loginFormField('password', '<tr><th>' . lang('Password') . '<td>', '<input type="password" name="auth[password]" autocomplete="current-password">');
 		echo "</table>\n";
 		echo "<p><input type='submit' value='" . lang('Login') . "'>\n";
 		echo checkbox("auth[permanent]", 1, $_COOKIE["adminer_permanent"], lang('Permanent login')) . "\n";
@@ -119,20 +119,19 @@ class Adminer {
 	}
 
 	function backwardKeys($table, $tableName) {
-		global $adminer;
 		$return = array();
 		foreach (
 			get_rows("SELECT TABLE_NAME, CONSTRAINT_NAME, COLUMN_NAME, REFERENCED_COLUMN_NAME
 FROM information_schema.KEY_COLUMN_USAGE
-WHERE TABLE_SCHEMA = " . q($adminer->database()) . "
-AND REFERENCED_TABLE_SCHEMA = " . q($adminer->database()) . "
+WHERE TABLE_SCHEMA = " . q(adminer()->database()) . "
+AND REFERENCED_TABLE_SCHEMA = " . q(adminer()->database()) . "
 AND REFERENCED_TABLE_NAME = " . q($table) . "
 ORDER BY ORDINAL_POSITION", null, "") as $row
 		) {
 			$return[$row["TABLE_NAME"]]["keys"][$row["CONSTRAINT_NAME"]][$row["COLUMN_NAME"]] = $row["REFERENCED_COLUMN_NAME"];
 		}
 		foreach ($return as $key => $val) {
-			$name = $adminer->tableName(table_status1($key, true));
+			$name = adminer()->tableName(table_status1($key, true));
 			if ($name != "") {
 				$search = preg_quote($tableName);
 				$separator = "(:|\\s*-)?\\s+";
@@ -238,7 +237,6 @@ ORDER BY ORDINAL_POSITION", null, "") as $row
 	}
 
 	function selectSearchPrint($where, $columns, $indexes) {
-		global $adminer;
 		$where = (array) $_GET["where"];
 		echo '<fieldset id="fieldset-search"><legend>' . lang('Search') . "</legend><div>\n";
 		$keys = array();
@@ -273,14 +271,14 @@ ORDER BY ORDINAL_POSITION", null, "") as $row
 		foreach ($where as $val) {
 			if (($val["col"] == "" || $columns[$val["col"]]) && "$val[col]$val[val]" != "") {
 				echo "<div><select name='where[$i][col]'><option value=''>(" . lang('anywhere') . ")" . optionlist($columns, $val["col"], true) . "</select>";
-				echo html_select("where[$i][op]", array(-1 => "") + $adminer->operators(), $val["op"]);
+				echo html_select("where[$i][op]", array(-1 => "") + adminer()->operators(), $val["op"]);
 				echo "<input type='search' name='where[$i][val]' value='" . h($val["val"]) . "'>" . script("mixin(qsl('input'), {onkeydown: selectSearchKeydown, onsearch: selectSearchSearch});", "") . "</div>\n";
 				$i++;
 			}
 		}
 		echo "<div><select name='where[$i][col]'><option value=''>(" . lang('anywhere') . ")" . optionlist($columns, null, true) . "</select>";
 		echo script("qsl('select').onchange = selectAddRow;", "");
-		echo html_select("where[$i][op]", array(-1 => "") + $adminer->operators());
+		echo html_select("where[$i][op]", array(-1 => "") + adminer()->operators());
 		echo "<input type='search' name='where[$i][val]'></div>";
 		echo script("mixin(qsl('input'), {onchange: function () { this.parentNode.firstChild.onchange(); }, onsearch: selectSearchSearch});");
 		echo "</div></fieldset>\n";
@@ -356,7 +354,7 @@ ORDER BY ORDINAL_POSITION", null, "") as $row
 	}
 
 	function selectSearchProcess($fields, $indexes) {
-		global $driver, $adminer;
+		global $driver;
 		$return = array();
 		foreach ((array) $_GET["where"] as $key => $where) {
 			$col = $where["col"];
@@ -371,9 +369,9 @@ ORDER BY ORDINAL_POSITION", null, "") as $row
 							$conds[] = (in_array(0, $val) ? "$name IS NULL OR " : "") . "$name IN (" . implode(", ", array_map('intval', $val)) . ")";
 						} else {
 							$text_type = preg_match('~char|text|enum|set~', $field["type"]);
-							$value = $adminer->processInput($field, (!$op && $text_type && preg_match('~^[^%]+$~', $val) ? "%$val%" : $val));
+							$value = adminer()->processInput($field, (!$op && $text_type && preg_match('~^[^%]+$~', $val) ? "%$val%" : $val));
 							$conds[] = $driver->convertSearch($name, $where, $field) . ($value == "NULL" ? " IS" . ($op == ">=" ? " NOT" : "") . " $value"
-								: (in_array($op, $adminer->operators()) || $op == "=" ? " $op $value"
+								: (in_array($op, adminer()->operators()) || $op == "=" ? " $op $value"
 								: ($text_type ? " LIKE $value"
 								: " IN (" . str_replace(",", "', '", $value) . ")"
 							)));
@@ -426,7 +424,6 @@ ORDER BY ORDINAL_POSITION", null, "") as $row
 	}
 
 	function selectEmailProcess($where, $foreignKeys) {
-		global $adminer;
 		if ($_POST["email_append"]) {
 			return true;
 		}
@@ -444,10 +441,10 @@ ORDER BY ORDINAL_POSITION", null, "") as $row
 					. ($_POST["all"] ? "" : " AND ((" . implode(") OR (", array_map('Adminer\where_check', (array) $_POST["check"])) . "))")
 				);
 				$fields = fields($_GET["select"]);
-				foreach ($adminer->rowDescriptions($rows, $foreignKeys) as $row) {
+				foreach (adminer()->rowDescriptions($rows, $foreignKeys) as $row) {
 					$replace = array('{\\' => '{'); // allow literal {$name}
 					foreach ($matches[1] as $val) {
-						$replace['{$' . "$val}"] = $adminer->editVal($row[$val], $fields[$val]);
+						$replace['{$' . "$val}"] = adminer()->editVal($row[$val], $fields[$val]);
 					}
 					$email = $row[$_POST["email_field"]];
 					if (is_mail($email) && send_mail($email, strtr($subject, $replace), strtr($message, $replace), $_POST["email_from"], $_FILES["email_files"])) {
@@ -596,8 +593,7 @@ ORDER BY ORDINAL_POSITION", null, "") as $row
 	}
 
 	function navigation($missing) {
-		global $adminer;
-		echo "<h1>" . $adminer->name() . " <span class='version'>" . VERSION;
+		echo "<h1>" . adminer()->name() . " <span class='version'>" . VERSION;
 		$new_version = $_COOKIE["adminer_version"];
 		echo " <a href='https://www.adminer.org/editor/#download'" . target_blank() . " id='version'>" . (version_compare(VERSION, $new_version) < 0 ? h($new_version) : "") . "</a>";
 		echo "</span></h1>\n";
@@ -617,13 +613,13 @@ ORDER BY ORDINAL_POSITION", null, "") as $row
 				}
 			}
 		} else {
-			$adminer->databasesPrint($missing);
+			adminer()->databasesPrint($missing);
 			if ($missing != "db" && $missing != "ns") {
 				$table_status = table_status('', true);
 				if (!$table_status) {
 					echo "<p class='message'>" . lang('No tables.') . "\n";
 				} else {
-					$adminer->tablesPrint($table_status);
+					adminer()->tablesPrint($table_status);
 				}
 			}
 		}
@@ -636,12 +632,11 @@ ORDER BY ORDINAL_POSITION", null, "") as $row
 	}
 
 	function tablesPrint($tables) {
-		global $adminer;
 		echo "<ul id='tables'>";
 		echo script("mixin(qs('#tables'), {onmouseover: menuOver, onmouseout: menuOut});");
 		foreach ($tables as $row) {
 			echo '<li>';
-			$name = $adminer->tableName($row);
+			$name = adminer()->tableName($row);
 			if ($name != "") { // ignore tables without name
 				echo "<a href='" . h(ME) . 'select=' . urlencode($row["Name"]) . "'"
 					. bold($_GET["select"] == $row["Name"] || $_GET["edit"] == $row["Name"], "select")
@@ -653,10 +648,9 @@ ORDER BY ORDINAL_POSITION", null, "") as $row
 	}
 
 	function _foreignColumn($foreignKeys, $column) {
-		global $adminer;
 		foreach ((array) $foreignKeys[$column] as $foreignKey) {
 			if (count($foreignKey["source"]) == 1) {
-				$name = $adminer->rowDescription($foreignKey["table"]);
+				$name = adminer()->rowDescription($foreignKey["table"]);
 				if ($name != "") {
 					$id = idf_escape($foreignKey["target"][0]);
 					return array($foreignKey["table"], $id, $name);
diff --git a/editor/include/connect.inc.php b/editor/include/connect.inc.php
index e0183e16..d9752a07 100644
--- a/editor/include/connect.inc.php
+++ b/editor/include/connect.inc.php
@@ -1,4 +1,4 @@
 <?php
 namespace Adminer;
 
-$connection->select_db($adminer->database());
+$connection->select_db(adminer()->database());
diff --git a/editor/script.inc.php b/editor/script.inc.php
index 83a29ab1..77acd532 100644
--- a/editor/script.inc.php
+++ b/editor/script.inc.php
@@ -4,7 +4,7 @@ namespace Adminer;
 if ($_GET["script"] == "kill") {
 	$connection->query("KILL " . number($_POST["kill"]));
 
-} elseif (list($table, $id, $name) = $adminer->_foreignColumn(column_foreign_keys($_GET["source"]), $_GET["field"])) { // complete
+} elseif (list($table, $id, $name) = adminer()->_foreignColumn(column_foreign_keys($_GET["source"]), $_GET["field"])) { // complete
 	$limit = 11;
 	$result = $connection->query("SELECT $id, $name FROM " . table($table) . " WHERE " . (preg_match('~^[0-9]+$~', $_GET["value"]) ? "$id = $_GET[value] OR " : "") . "$name LIKE " . q("$_GET[value]%") . " ORDER BY 2 LIMIT $limit");
 	for ($i=1; ($row = $result->fetch_row()) && $i < $limit; $i++) {
diff --git a/plugins/drivers/clickhouse.php b/plugins/drivers/clickhouse.php
index b9726531..46e3694a 100644
--- a/plugins/drivers/clickhouse.php
+++ b/plugins/drivers/clickhouse.php
@@ -257,8 +257,7 @@ if (isset($_GET["clickhouse"])) {
 	}
 
 	function logged_user() {
-		$adminer = adminer();
-		$credentials = $adminer->credentials();
+		$credentials = adminer()->credentials();
 		return $credentials[1];
 	}
 
diff --git a/plugins/drivers/firebird.php b/plugins/drivers/firebird.php
index 0b4fe2d9..cfc89fc0 100644
--- a/plugins/drivers/firebird.php
+++ b/plugins/drivers/firebird.php
@@ -125,8 +125,7 @@ if (isset($_GET["firebird"])) {
 	}
 
 	function logged_user() {
-		$adminer = adminer();
-		$credentials = $adminer->credentials();
+		$credentials = adminer()->credentials();
 		return $credentials[1];
 	}
 
diff --git a/plugins/drivers/simpledb.php b/plugins/drivers/simpledb.php
index 1980bb1f..23ea4a29 100644
--- a/plugins/drivers/simpledb.php
+++ b/plugins/drivers/simpledb.php
@@ -260,8 +260,7 @@ if (isset($_GET["simpledb"])) {
 	}
 
 	function logged_user() {
-		$adminer = adminer();
-		$credentials = $adminer->credentials();
+		$credentials = adminer()->credentials();
 		return $credentials[1];
 	}
 
@@ -383,9 +382,8 @@ if (isset($_GET["simpledb"])) {
 	}
 
 	function sdb_request($action, $params = array()) {
-		$adminer = adminer();
 		$connection = connection();
-		list($host, $params['AWSAccessKeyId'], $secret) = $adminer->credentials();
+		list($host, $params['AWSAccessKeyId'], $secret) = adminer()->credentials();
 		$params['Action'] = $action;
 		$params['Timestamp'] = gmdate('Y-m-d\TH:i:s+00:00');
 		$params['Version'] = '2009-04-15';
diff --git a/plugins/sql-log.php b/plugins/sql-log.php
index bd63fa23..32289d73 100644
--- a/plugins/sql-log.php
+++ b/plugins/sql-log.php
@@ -26,8 +26,7 @@ class AdminerSqlLog {
 
 	private function log($query) {
 		if ($this->filename == "") {
-			$adminer = Adminer\adminer();
-			$this->filename = $adminer->database() . ".sql"; // no database goes to ".sql" to avoid collisions
+			$this->filename = Adminer\adminer()->database() . ".sql"; // no database goes to ".sql" to avoid collisions
 		}
 		$fp = fopen($this->filename, "a");
 		flock($fp, LOCK_EX);