Signature

get_plugin_page_hook( $plugin_page, $parent_page )
plugin_page
 (string)
parent_page
 (string)

Return

(string|null)

Source

function get_plugin_page_hook( $plugin_page, $parent_page ) {
	$hook = get_plugin_page_hookname( $plugin_page, $parent_page );
	if ( has_action($hook) )
		return $hook;
	else
		return null;
}
WP Trac GitHub

Link here