将元框的数量限制为首次用户的页面,帖子,链接和类别。

原型

wp_initial_nav_menu_meta_boxes()

源文件

路径:wp-admin/includes/nav-menu.php

<?php
...
function wp_initial_nav_menu_meta_boxes() {
	global $wp_meta_boxes;
	if ( get_user_option( 'metaboxhidden_nav-menus' ) !== false || ! is_array($wp_meta_boxes) )
		return;
	$initial_meta_boxes = array( 'add-post-type-page', 'add-post-type-post', 'add-custom-links', 'add-category' );
	$hidden_meta_boxes = array();
	foreach ( array_keys($wp_meta_boxes['nav-menus']) as $context ) {
		foreach ( array_keys($wp_meta_boxes['nav-menus'][$context]) as $priority ) {
			foreach ( $wp_meta_boxes['nav-menus'][$context][$priority] as $box ) {
				if ( in_array( $box['id'], $initial_meta_boxes ) ) {
					unset( $box['id'] );
				} else {
					$hidden_meta_boxes[] = $box['id'];
				}
			}
		}
	}
	$user = wp_get_current_user();
	update_user_option( $user->ID, 'metaboxhidden_nav-menus', $hidden_meta_boxes, true );
}
...
?>

其他

英文文档:https://developer.wordpress.org/reference/functions/wp_initial_nav_menu_meta_boxes/