function drupal_get_database_types

Returns all supported database installer objects that are compiled into PHP.

Return value

An array of database installer objects compiled into PHP.

File

includes/install.inc, line 253

Code

function drupal_get_database_types() {
    $databases = array();
    // We define a driver as a directory in /includes/database that in turn
    // contains a database.inc file. That allows us to drop in additional drivers
    // without modifying the installer.
    // Because we have no registry yet, we need to also include the install.inc
    // file for the driver explicitly.
    require_once DRUPAL_ROOT . '/includes/database/database.inc';
    foreach (file_scan_directory(DRUPAL_ROOT . '/includes/database', '/^[a-z]*$/i', array(
        'recurse' => FALSE,
    )) as $file) {
        if (file_exists($file->uri . '/database.inc') && file_exists($file->uri . '/install.inc')) {
            $drivers[$file->filename] = $file->uri;
        }
    }
    foreach ($drivers as $driver => $file) {
        $installer = db_installer_object($driver);
        if ($installer->installable()) {
            $databases[$driver] = $installer;
        }
    }
    // Usability: unconditionally put the MySQL driver on top.
    if (isset($databases['mysql'])) {
        $mysql_database = $databases['mysql'];
        unset($databases['mysql']);
        $databases = array(
            'mysql' => $mysql_database,
        ) + $databases;
    }
    return $databases;
}