WordPress at a glance
action is not described

load-(pagenow) action-hook . WP 2.1.0

Fires before a particular screen is loaded.

The load-* hook fires in a number of contexts. This hook is for core screens.

The dynamic portion of the hook name, $pagenow, is a global variable referring to the filename of the current page, such as 'admin.php', 'post-new.php' etc. A complete hook for the latter would be 'load-post-new.php'.

Использование

add_action( 'load-(pagenow)', 'action_function_name_5126' );
function action_function_name_5126(){
	// action...
}

Changelog

Since 2.1.0 Introduced.

Where the hook is called

In file: /wp-admin/admin.php
load-(pagenow)
wp-admin/admin.php 374
do_action( "load-{$pagenow}" ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores

Where in WP core the hook is used WordPress

wp-admin/admin.php 113
add_action( 'load-plugins.php', 'wp_plugin_update_rows', 20 ); // After wp_update_plugins() is called.
wp-admin/admin.php 114
add_action( 'load-themes.php', 'wp_theme_update_rows', 20 ); // After wp_update_themes() is called.
wp-admin/admin.php 70
add_action( "load-{$page}", array( $this, 'admin_load' ) );
wp-admin/admin.php 71
add_action( "load-{$page}", array( $this, 'take_action' ), 49 );
wp-admin/admin.php 72
add_action( "load-{$page}", array( $this, 'handle_upload' ), 49 );
wp-admin/admin.php 880
add_action( 'load-plugins.php', 'wp_update_plugins' );
wp-admin/admin.php 881
add_action( 'load-update.php', 'wp_update_plugins' );
wp-admin/admin.php 882
add_action( 'load-update-core.php', 'wp_update_plugins' );
wp-admin/admin.php 886
add_action( 'load-themes.php', 'wp_update_themes' );
wp-admin/admin.php 887
add_action( 'load-update.php', 'wp_update_themes' );
wp-admin/admin.php 888
add_action( 'load-update-core.php', 'wp_update_themes' );