Fires before a particular screen is loaded.
wp-admin/admin.php:393file scope /* * The following hooks are fired to ensure backward compatibility. * In all other cases, 'load-' . $pagenow should be used instead. */ if ( 'page' === $typenow ) { if ( 'post-new.php' === $pagenow ) { do_action( 'load-page-new.php' ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores } elseif ( 'post.php' === $pagenow ) { do_action( 'load-page.php' ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores } } elseif ( 'edit-tags.php' === $pagenow ) { if ( 'category' === $taxnow ) { do_action( 'load-categories.php' ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscoresIntroduced in 2.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.