WordPress at a glance
action is not described

load-(plugin_page) action-hook . WP 1.5.0

Fires before a particular screen is loaded.

The load-* hook fires in a number of contexts. This hook is for plugin screens where the file to load is directly included, rather than the use of a function.

The dynamic portion of the hook name, $plugin_page, refers to the plugin basename.

Usage

add_action( 'load-(plugin_page)', 'action_function_name_6885' );
function action_function_name_6885(){
	// action...
}

Where the hook is called

In file: /wp-admin/admin.php
load-(plugin_page)
wp-admin/admin.php 275
do_action( "load-{$plugin_page}" );

Where the hook is used (in WP core)

wp-admin/custom-background.php 70
add_action( "load-$page", array( $this, 'admin_load' ) );
wp-admin/custom-background.php 71
add_action( "load-$page", array( $this, 'take_action' ), 49 );
wp-admin/custom-background.php 72
add_action( "load-$page", array( $this, 'handle_upload' ), 49 );
wp-admin/includes/admin-filters.php 116
add_action( 'load-plugins.php', 'wp_plugin_update_rows', 20 ); // After wp_update_plugins() is called.
wp-admin/includes/admin-filters.php 117
add_action( 'load-themes.php', 'wp_theme_update_rows', 20 ); // After wp_update_themes() is called.
wp-admin/includes/admin-filters.php 50
add_action( 'load-tools_page_export_personal_data', '_wp_privacy_requests_screen_options' );
wp-admin/includes/admin-filters.php 51
add_action( 'load-tools_page_remove_personal_data', '_wp_privacy_requests_screen_options' );
wp-includes/update.php 808
add_action( 'load-plugins.php', 'wp_update_plugins' );
wp-includes/update.php 809
add_action( 'load-update.php', 'wp_update_plugins' );
wp-includes/update.php 810
add_action( 'load-update-core.php', 'wp_update_plugins' );
wp-includes/update.php 814
add_action( 'load-themes.php', 'wp_update_themes' );
wp-includes/update.php 815
add_action( 'load-update.php', 'wp_update_themes' );
wp-includes/update.php 816
add_action( 'load-update-core.php', 'wp_update_themes' );