update_postmeta │ action-hook │ WP 2.9.0

Fires immediately before updating a post's metadata.

Usage

add_action( 'update_postmeta', 'wp_kama_update_postmeta_action', 10, 4 );

/**
 * Function for `update_postmeta` action-hook.
 * 
 * @param int    $meta_id    ID of metadata entry to update.
 * @param int    $object_id  Post ID.
 * @param string $meta_key   Metadata key.
 * @param mixed  $meta_value Metadata value. This will be a PHP-serialized string representation of the value if the value is an array, an object, or itself a PHP-serialized string.
 *
 * @return void
 */
function wp_kama_update_postmeta_action( $meta_id, $object_id, $meta_key, $meta_value ){

	// action...
}

$meta_id(int)

ID of metadata entry to update.

$object_id(int)

Post ID.

$meta_key(string)

Metadata key.

$meta_value(mixed)

Metadata value. This will be a PHP-serialized string representation of the value if the value is an array, an object, or itself a PHP-serialized string.

Changelog

Where the hook is called

do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value );

do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value );

Where the hook is used in WordPress