WordPress как на ладони
Недорогой хостинг для сайтов на WordPress: wordpress.jino.ru
фильтр не описан

update_feedback хук-фильтр . WP 1.0

Outout the failure error as a normal feedback, and not as an error:

Использование

add_filter( 'update_feedback', 'filter_function_name_8421' );
function filter_function_name_8421( $download_error_message ){
	// filter...

	return $download_error_message;
}
$download_error_message
-

Где вызывается хук

Core_Upgrader::upgrade()
update_feedback
update_core()
update_feedback
wp-admin/includes/class-core-upgrader.php 130
apply_filters( 'update_feedback', $download->get_error_message() );
wp-admin/includes/class-core-upgrader.php 193
apply_filters( 'update_feedback', $result );
wp-admin/includes/class-core-upgrader.php 196
apply_filters( 'update_feedback', $this->strings['start_rollback'] );
wp-admin/includes/update-core.php 907
apply_filters( 'update_feedback', __( 'Verifying the unpacked files…' ) );
wp-admin/includes/update-core.php 1018
apply_filters( 'update_feedback', __( 'Preparing to install the latest version…' ) );
wp-admin/includes/update-core.php 1080
apply_filters( 'update_feedback', __( 'Enabling Maintenance mode…' ) );
wp-admin/includes/update-core.php 1088
apply_filters( 'update_feedback', __( 'Copying the required files…' ) );
wp-admin/includes/update-core.php 1175
apply_filters( 'update_feedback', __( 'Disabling Maintenance mode…' ) );
wp-admin/includes/update-core.php 1264
apply_filters( 'update_feedback', __( 'Upgrading database…' ) );

Где используется хук (в ядре WP)

wp-admin/includes/class-wp-automatic-updater.php 280
add_filter( 'update_feedback', array( $skin, 'feedback' ) );
wp-admin/includes/deprecated.php 1157
add_filter('update_feedback', $feedback);
wp-admin/includes/deprecated.php 1180
add_filter('update_feedback', $feedback);
wp-admin/includes/deprecated.php 1202
add_filter('update_feedback', $feedback);
wp-admin/update-core.php 608
add_filter( 'update_feedback', 'show_message' );