Online PHP editor | output for XQL4f

<?php class WP_Term { public $foo = 'foo'; public $data; // Change the visibility to protected or private and the script will throw an error. } $_POST['action'] = 'action'; function wp_parse_args( $args, $defaults = array() ) { if ( is_object( $args ) ) { $parsed_args = get_object_vars( $args ); } elseif ( is_array( $args ) ) { $parsed_args =& $args; } else { wp_parse_str( $args, $parsed_args ); } if ( is_array( $defaults ) && $defaults ) { return array_merge( $defaults, $parsed_args ); } return $parsed_args; } class WP_Ajax_Response { public $responses = array(); public function add( $args = '' ) { $defaults = array( 'what' => 'object', 'action' => false, 'id' => '0', 'old_id' => false, 'position' => 1, 'data' => '', 'supplemental' => array(), ); $parsed_args = wp_parse_args( $args, $defaults ); $position = preg_replace( '/[^a-z0-9:_-]/i', '', $parsed_args['position'] ); $id = $parsed_args['id']; $what = $parsed_args['what']; $action = $parsed_args['action']; $old_id = $parsed_args['old_id']; $data = $parsed_args['data']; $response = "<response_data><![CDATA[$data]]></response_data>"; $s = ''; if ( is_array( $parsed_args['supplemental'] ) ) { foreach ( $parsed_args['supplemental'] as $k => $v ) { $s .= "<$k><![CDATA[$v]]></$k>"; } $s = "<supplemental>$s</supplemental>"; } if ( false === $action ) { $action = $_POST['action']; } $x = ''; $x .= "<response action='{$action}_$id'>"; // The action attribute in the xml output is formatted like a nonce action. $x .= "<$what id='$id' " . ( false === $old_id ? '' : "old_id='$old_id' " ) . "position='$position'>"; $x .= $response; $x .= $s; $x .= "</$what>"; $x .= '</response>'; $this->responses[] = $x; return $x; } } $response = new WP_Ajax_Response(); $tag = new WP_Term(); $response->add( array( 'what' => 'term', 'supplemental' => (array) $tag, ) ); libxml_use_internal_errors( true ); $xml = simplexml_load_string( $response->responses[0], 'SimpleXMLElement' ); if ( $xml === false ) { echo 'Failed loading XML: '; foreach ( libxml_get_errors() as $error ) { // Display each error echo '<br>', $error->message . "\n"; } // Clear the error buffer to free memory libxml_clear_errors(); } else { // Your XML is correctly parsed, proceed with your logic echo 'XML loaded successfully.' . "\n"; }