WordPress at a glance
action is not described

get_header action-hook . WP 2.1.0

Fires before the header template file is loaded.

Usage

add_action( 'get_header', 'action_function_name_5415', 10, 2 );
function action_function_name_5415( $name, $args ){
	// action...
}
$name(string|null)
Name of the specific header file to use. Null for the default header.
$args(array)
Additional arguments passed to the header template.

Changelog

Since 2.1.0 Introduced.
Since 2.8.0 The $name parameter was added.
Since 5.5.0 The $args parameter was added.

Where the hook is called

get_header()
get_header
wp-includes/general-template.php 38
do_action( 'get_header', $name, $args );

Where in WP core the hook is used WordPress

Usage not found.