WordPress 全局变量：$pagenow 判断后台页面位置

        global $pagenow;

        print_r($pagenow);

网上看到这个，我试了一下没什么卵用，

function get_current_post_type() {
    global $post, $typenow, $current_screen;
    //we have a post so we can just get the post type from that
    if ($post && $post->post_type) {
        return $post->post_type;
    } //check the global $typenow - set in admin.php
    elseif ($typenow) {
        return $typenow;
    } //check the global $current_screen object - set in sceen.php
    elseif ($current_screen && $current_screen->post_type) {
        return $current_screen->post_type;
    } //check the post_type querystring
    elseif (isset($_REQUEST['post_type'])) {
        return sanitize_key($_REQUEST['post_type']);
    } //lastly check if post ID is in query string
    elseif (isset($_REQUEST['post'])) {
        return get_post_type($_REQUEST['post']);
    }
    //we do not know the post type!
    return null;
}

参考：
https://wangejiba.com/4915.html