SimplePie_Item::get_id

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Summery Summery

Get the unique identifier for the item

Syntax Syntax

SimplePie_Item::get_id( boolean $hash = false )

Description Description

This is usually used when writing code to check for new items in a feed.

Uses <atom:id>, <guid>, <dc:identifier> or the about attribute for RDF. If none of these are supplied (or $hash is true), creates an MD5 hash based on the permalink and title. If either of those are not supplied, creates a hash based on the full feed data.

Parameters Parameters

$hash

(boolean) (Optional) Should we force using a hash instead of the supplied ID?

Default value: false

Return Return

(string)

Source Source

File: wp-includes/SimplePie/Item.php

		{
			if ($return = $this->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10, 'id'))
			{
				return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
			}
			elseif ($return = $this->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_03, 'id'))
			{
				return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
			}
			elseif ($return = $this->get_item_tags(SIMPLEPIE_NAMESPACE_RSS_20, 'guid'))
			{
				return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
			}
			elseif ($return = $this->get_item_tags(SIMPLEPIE_NAMESPACE_DC_11, 'identifier'))
			{
				return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
			}
			elseif ($return = $this->get_item_tags(SIMPLEPIE_NAMESPACE_DC_10, 'identifier'))
			{
				return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
			}
			elseif (isset($this->data['attribs'][SIMPLEPIE_NAMESPACE_RDF]['about']))
			{
				return $this->sanitize($this->data['attribs'][SIMPLEPIE_NAMESPACE_RDF]['about'], SIMPLEPIE_CONSTRUCT_TEXT);
			}
		}
		if ($fn === false)
		{
			return null;
		}
		elseif (!is_callable($fn))
		{
			trigger_error('User-supplied function $fn must be callable', E_USER_WARNING);
			$fn = 'md5';
		}
		return call_user_func($fn,
		       $this->get_permalink().$this->get_title().$this->get_content());
	}

	/**
	 * Get the title of the item
	 *
	 * Uses `<atom:title>`, `<title>` or `<dc:title>`
	 *
	 * @since Beta 2 (previously called `get_item_title` since 0.8)
	 * @return string|null

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Changelog Changelog

Changelog
Version Description
Beta 2 Introduced.

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