fixes sqlite3 error

includes/sqlite.php

@@ -46,7 +46,14 @@ class KleejaDatabase
     {
         try
         {
-            $this->connect_id = new SQLite3(PATH . $db_name, SQLITE3_OPEN_READWRITE);
+            if (class_exists('SQLite3'))
+            {
+                $this->connect_id = new SQLite3(PATH . $db_name, SQLITE3_OPEN_READWRITE);
+            }
+            else
+            {
+                $this->error_msg('SQLite3 extension is not installed in your server!');
+            }
         }
         catch (Exception $e)
         {

install/install.php

@@ -133,6 +133,7 @@ case 'c':
 
     $no_config         = ! file_exists(PATH . 'config.php') || ig('force') ? false : true;
     $writeable_path    = is_writable(PATH) ? true : false;
+    $sqlite3_exists = class_exists('SQLite3');
 
     echo gettpl('configs.html');
 

install/style/configs.html

@@ -10,7 +10,9 @@
             <td class="TdInput">
                 <select name="db_type" id="db_type" style="text-align:left;direction:ltr">
                     <option value="mysql" selected>{{echo $lang['DB_TYPE_MYSQL']}}</option>
+                    {{if ($sqlite3_exists):}}
                     <option value="sqlite">{{echo $lang['DB_TYPE_SQLITE']}}</option>
+                    {{endif;}}
                 </select>
             </td>
         </tr>