4 * Pick the right DB class and return an instance
7 * @param string $extension Optional: user defined choice
8 * @return class $ydb DB class instance
10 function yourls_set_DB_driver( ) {
12 // Auto-pick the driver. Priority: user defined, then PDO, then mysqli, then mysql
13 if ( defined( 'YOURLS_DB_DRIVER' ) ) {
14 $driver = strtolower( YOURLS_DB_DRIVER ); // accept 'MySQL', 'mySQL', etc
15 } elseif ( extension_loaded( 'pdo_mysql' ) ) {
17 } elseif ( extension_loaded( 'mysqli' ) ) {
19 } elseif ( extension_loaded( 'mysql' ) ) {
26 if ( in_array( $driver, array( 'mysql', 'mysqli', 'pdo' ) ) ) {
27 require_once( YOURLS_INC . '/ezSQL/ez_sql_core.php' );
28 require_once( YOURLS_INC . '/ezSQL/ez_sql_core_yourls.php' );
29 require_once( YOURLS_INC . '/ezSQL/ez_sql_' . $driver . '.php' );
30 require_once( YOURLS_INC . '/ezSQL/ez_sql_' . $driver . '_yourls.php' );
32 $class = 'ezSQL_' . $driver . '_yourls';
36 if ( !class_exists( $class, false ) ) {
37 $ydb = new stdClass();
39 yourls__( 'YOURLS requires the mysql, mysqli or pdo_mysql PHP extension. No extension found. Check your server config, or contact your host.' ),
40 yourls__( 'Fatal error' ),
45 yourls_do_action( 'set_DB_driver', $driver );
47 $ydb = new $class( YOURLS_DB_USER, YOURLS_DB_PASS, YOURLS_DB_NAME, YOURLS_DB_HOST );
49 yourls_debug_log( "DB driver: $driver" );