[WordPress] fetch_feed_wrapper

fetch_feed_wrapper.php

<?php
if ( !function_exists('fetch_feed') )
	include_once(ABSPATH . WPINC . "/feed.php");

if ( !class_exists('fetch_feed_wrapper') ):


class fetch_feed_wrapper {
	private $feed;
	private $current = 0;
	private $current_item;
	private $max_items;

	public function __construct($feed_url, $max = 0) {
		$this->feed = fetch_feed($feed_url);
		$this->current = 0;
		$this->max_items = $this->max($max);
	}

	public function error(){
		return is_wp_error($this->feed);
	}

	public function error_code(){
		if ( is_wp_error($this->feed) )
			return $this->feed->get_error_code();
		else
			return false;
	}

	public function error_message(){
		if ( is_wp_error($this->feed) )
			return $this->feed->get_error_message();
		else
			return '';
	}

	public function length(){
		return $this->max_items;
	}

	private function max($max = 0) {
		if ($this->error())
			return false;

		$this->max_items = $this->feed->get_item_quantity($max);
		return $this->max_items;
	}

	public function fetch($current = false){
		if ($this->error())
			return false;

		if ($this->current > $this->max_items) {
			$this->current_item = false;
			return false;
		}

		$current = $current ? $current : $this->current;
		$this->current_item = $this->item($current);
		$this->current++;

		return $this->current_item;
	}

	private function item($x){
		if ($this->error())
			return false;

		$item = $this->feed->get_item($x);
		return $item;
	}

	private function check_item(){
		if ($this->error())
			return false;
		if (!$this->current_item)
			if ( !$this->fetch() )
				return false;
		return true;
	}

	public function namespaces(){
		if ( ! $this->check_item() )
			return false;

		return array_keys($this->current_item->data['child']);
	}

	public function id($hash = false){
		if ( ! $this->check_item() )
			return false;

		return $this->current_item->get_id($hash);
	}

	public function title(){
		if ( ! $this->check_item() )
			return false;

		return $this->current_item->get_title();
	}

	public function permalink(){
		if ( ! $this->check_item() )
			return false;

		return $this->current_item->get_permalink();
	}

	public function publish($format = 'Y-m-d H:i:s'){
		if ( ! $this->check_item() )
			return false;

		return $this->current_item->get_date($format);
	}

	public function updated($format = 'Y-m-d H:i:s'){
		if ( ! $this->check_item() )
			return false;

		return $this->current_item->get_updated_date($format);
	}

	public function categories(){
		if ( ! $this->check_item() )
			return false;

		return $this->current_item->get_categories();
	}

	public function authors(){
		if ( ! $this->check_item() )
			return false;

		return $this->current_item->get_authors();
	}

	public function enclosures() {
		if ( ! $this->check_item() )
			return false;

		return $this->current_item->get_enclosures();
	}

	public function latitude() {
		if ( ! $this->check_item() )
			return false;

		return $this->current_item-> get_latitude();
	}

	public function excerpt($description_only = false ){
		if ( ! $this->check_item() )
			return false;

		return $this->current_item->get_description($description_only);
	}

	public function content($content_only = false){
		if ( ! $this->check_item() )
			return false;

		return $this->current_item->get_description($content_only);
	}


	public function child($tag, $singleval = true){
		if ( ! $this->check_item() )
			return false;

		$results = array();
		foreach ($this->current_item->data['child'] as $child) {
			if ( !isset($child[$tag]) )
				continue;
			foreach ($child[$tag] as $data){
				if ( isset($data['data']) ) {
					$results[] = $data['data'];
					if ($singleval)
						break;
				}
			}
		}

		return
			$singleval
			? ( isset($results[0]) ? $results[0] : '' )
			: $results;
	}
}

endif;

gistfile1.txt

<?php
$feed = new fetch_feed_wrapper('http://example.com/feed', 0);
while ($item = $feed->fetch()) {
        var_dump($feed->title());
        var_dump($feed->child('custome_tag'));
}