get_post_custom_values() WordPress Function

The get_post_custom_values() function allows you to get the values of custom fields for a given post. Custom fields are a way to add extra data to a post, and they are set up by the user in the administration area. The function takes two parameters: the key of the custom field you want to get, and the post ID.

get_post_custom_values( string $key = '', int $post_id ) #

function get_post_custom_values( $key = '', $post_id = 0 ) {
	if ( ! $key ) {
		return null;
	}

	$custom = get_post_custom( $post_id );

	return isset( $custom[ $key ] ) ? $custom[ $key ] : null;
}