get_post_custom_keys()
Retrieve meta field names for a post.
If there are no meta fields, then nothing (null) will be returned.
Uses: get_post_custom()
Used By: the_meta()
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
Changelog
Since 1.2.0 | Introduced. |
Code of get_post_custom_keys() get post custom keys WP 6.0
function get_post_custom_keys( $post_id = 0 ) { $custom = get_post_custom( $post_id ); if ( ! is_array( $custom ) ) { return; } $keys = array_keys( $custom ); if ( $keys ) { return $keys; } }