W3cubDocs

/WordPress

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

Version Description
1.2.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/get_post_custom_keys