WordPress at a glance
action is not described

deprecated_hook_run action-hook . WP 4.6.0

Fires when a deprecated hook is called.


add_action( 'deprecated_hook_run', 'action_function_name_7524', 10, 4 );
function action_function_name_7524( $hook, $replacement, $version, $message ){
	// action...
The hook that was called.
The hook that should be used as a replacement.
The version of WordPress that deprecated the argument used.
A message regarding the change.

Where the hook is called

wp-includes/functions.php 4133
do_action( 'deprecated_hook_run', $hook, $replacement, $version, $message );
woocommerce/includes/wc-deprecated-functions.php 69
do_action( 'deprecated_hook_run', $hook, $replacement, $version, $message );

Where the hook is used (in WP core)

Does not used.