get_post_custom_keys( int $post_id )

Retrieve meta field names for a post.


Description

If there are no meta fields, then nothing (null) will be returned.


Parameters

$post_id

(int) (Optional) Post ID. Default is ID of the global $post.


Return

(array|void) Array of the keys, if retrieved.


Source

File: wp-includes/post.php

function get_post_custom_keys( $post_id = 0 ) {
	$custom = get_post_custom( $post_id );

	if ( !is_array($custom) )
		return;

	if ( $keys = array_keys($custom) )
		return $keys;
}


Changelog

Changelog
Version Description
WP-1.2.0 Introduced.