get_post_custom_keys() WP 1.0

Retrieve meta field names for a post.

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

No Hooks.

Return

Array/null. Array of the keys, if retrieved.

Usage

get_post_custom_keys( $post_id );

$post_id(int)

Post ID.
Default: ID of the global $post

Code of get_post_custom_keys: wp-includes/post.php ^{VER 4.9.8}

<?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;
}

Related Functions

From tag: Metadatas (any)