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_8831' );
function action_function_name_8831( $name ){
	// action...
}
$name(string/null)
Name of the specific header file to use. null for the default header.

Changelog

Since 2.1.0 Introduced.
Since 2.8.0 $name parameter added.

Where the hook is called

get_header()
get_header
wp-includes/general-template.php 31
do_action( 'get_header', $name );

Where the hook is used (in WP core)

Usage not found!