Online PHP editor | refs for A5mm2

<?php // $valid_check = call_user_func( $arg['validate_callback'], $param, $this, $key ); $arg = array( 'validate_callback' => 'is_numeric' ); $param = '14102'; $obj = new stdClass; $key = 'id'; $valid_check = call_user_func( $arg['validate_callback'], $param, $obj, $key ); var_dump( $valid_check );