wphooks.info - postmeta_form_keys

postmeta_form_keys

(trunk - 5.1-alpha-44286)

The hook occurs in the following file:

wp-admin/includes/template.php:
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	 * Filters values for the meta key dropdown in the Custom Fields meta box.
	 *
	 * Returning a non-null value will effectively short-circuit and avoid a
	 * potentially expensive query against postmeta.
	 *
	 * @since 4.4.0
	 *
	 * @param array|null $keys Pre-defined meta keys to be used in place of a postmeta query. Default null.
	 * @param WP_Post    $post The current post object.
	 */
	$keys = apply_filters( 'postmeta_form_keys', null, $post );

	if ( null === $keys ) {
		/**
		 * Filters the number of custom fields to retrieve for the drop-down
		 * in the Custom Fields meta box.
		 *
		 * @since 2.1.0
		 *
		 * @param int $limit Number of custom fields to retrieve. Default 30.