call_user_func_array()：参数 #1 ($callback) 必须是有效的回调

Question

我目前正在开发一个WordPress插件。 我创建的主类激活和停用插件的所有必要功能、设置和文件，我使用 composer 来管理类的包含。

昨天我将主

psr-4

文件夹从

src/

更改为

admin/builder/

，这导致了问题。
现在项目的层次结构是这样的：

onfeed-facebook\
|---admin\
    |---builder
        |---Action\
        |---RSA\
        |---View\
        |---OnFeedMain.php
|---vendor\
|---assets\
|---onfeed.php
|---...

我应该指出，编辑

composer.json

文件后，我还运行了

composer dump-autoload

命令...但我仍然收到此错误：

Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, first array member is not a valid class name or object in C:\www\clientwp.local\wp-includes\class-wp-hook.php:310 
Stack trace: 
#0 C:\www\clientwp.local\wp-includes\class-wp-hook.php(334): WP_Hook->apply_filters('', Array) 
#1 C:\www\clientwp.local\wp-includes\plugin.php(517): WP_Hook->do_action(Array) 
#2 C:\www\clientwp.local\wp-admin\includes\plugin.php(816): do_action('deactivate_onfe...', false) 
#3 C:\www\clientwp.local\wp-admin\plugins.php(209): deactivate_plugins('onfeed-facebook...', false, false) 
#4 {main} thrown in C:\www\clientwp.local\wp-includes\class-wp-hook.php on line 310

这是

composer.json

文件：

    "autoload": {
        "psr-4": {
            "Oppimittinetworking\\OnfeedFacebook\\": "admin/builder/"
        }
    },
    "config": {
        "optimize-autoloader": true
    }

这是

OnFeedMain.php

班级：

namespace Oppimittinetworking\OnfeedFacebook;
use Oppimittinetworking\OnfeedFacebook\Action\ONFActivate;
use Oppimittinetworking\OnfeedFacebook\Action\ONFDeactivate;
use Oppimittinetworking\OnfeedFacebook\RSA\ONFRSAEncrypt;
use Oppimittinetworking\OnfeedFacebook\RSA\ONFRSADecrypt;

class OnFeedMain {

    public function __construct() {
        ONFActivate::activate();
        ONFActivate::register_admin_scripts();
        ONFActivate::register_wp_scripts();
    }

    public function __deactivate() {
        ONFDeactivate::deactivate();
        ONFDeactivate::unregister_admin_scripts();
        ONFDeactivate::unregister_wp_scripts();
    }

    public static function encrypt_conn() { return new ONFRSAEncrypt(); }
    public function decrypt_data() { return new ONFRSADecrypt(); }
}

这是

onfeed.php

文件：

require_once ONFEED_PLUGIN_PATH . '/vendor/autoload.php';
use Oppimittinetworking\OnfeedFacebook\OnFeedMain;

if ( class_exists( 'OnFeedMain' ) )
    $onfmain = new OnFeedMain();

// activaion hook
register_activation_hook( __FILE__, array( $onfmain, '__construct' ) );

// deactivation hook
register_deactivation_hook( __FILE__, array( $onfmain, '__deactivate' ) );

这是

ONFActivate.php

和

ONFDeactivate.php

类中的函数：

ONFActivate.php

：

namespace Oppimittinetworking\OnfeedFacebook\Action;

class ONFActivate {

    public static function activate() {
        // No relevant code ...
    }

    public static function register_admin_scripts() {
        add_action( 'admin_enqueue_scripts', array( 'Oppimittinetworking\OnfeedFacebook\Action\ONFActivate', "enqueue_admin" ) );

        add_action( 'admin_menu', array( "Oppimittinetworking\OnfeedFacebook\Action\ONFActivate", 'add_admin_pages' ) );
    }

    public static function add_admin_pages() {
        add_menu_page( 'OnFeed Facebook', 'OnFeed Facebook', 'manage_options', 'onfeed_admin_menu', array( 'Oppimittinetworking\OnfeedFacebook\Action\ONFActivate', 'admin_index' ), 'dashicons-facebook-alt', 110 );
    }

    public static function admin_index() {
        require_once plugin_dir_path( __FILE__ ) . '../../admin/builder/index.php';
    }

    public static function register_wp_scripts() {
        // TODO
    }

    public static function enqueue_admin() {
        // Enqueue admin css files
        // [email protected]
        wp_register_style( "bootstrap", "https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" );
        wp_enqueue_style( "bootstrap" );

        // [email protected]
        wp_register_style( "font_awesome", "https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css" );
        wp_enqueue_style( "font_awesome" );

        wp_enqueue_style( "onfeed_main_css", plugins_url( "../../assets/css/main.css", __FILE__ ) );
        wp_enqueue_style( "onfeed_shortcut_css", plugins_url( "../../assets/css/shortcut.css", __FILE__ ) );
        wp_enqueue_style( "onfeed_feedspage_css", plugins_url( "../../assets/css/feedspage.css", __FILE__ ) );
        
        // Enqueue admin js files
        // [email protected]
        wp_enqueue_script( "jquery_3_7_1-min", plugins_url( "../../assets/js/jquery-3.7.1.min.js", __FILE__ ), null, '3.7.1', array( 'strategy' => 'async' ) );

        wp_enqueue_script( "onfeed_function_js", plugins_url( "../../assets/js/function.js", __FILE__ ), null, '2.2.0', array( 'strategy' => 'defer' ) );
        wp_enqueue_script( "onfeed_handshake_js", plugins_url( "../../assets/js/handshake.js", __FILE__ ), null, '2.2.0', array( 'strategy' => 'defer' ) );
        wp_enqueue_script( "onfeed_shortcut_js", plugins_url( "../../assets/js/shortcut.js", __FILE__ ), null, '2.2.0', array( 'strategy' => 'defer' ) );
        wp_enqueue_script( "onfeed_feedspage_js", plugins_url( "../../assets/js/feedspage.js", __FILE__ ), null, '2.2.0', array( 'strategy' => 'defer' ) );
    }

    public static function enqueue_wp() {
        // TODO
    }
}

ONFDeactivate.php

：

namespace Oppimittinetworking\OnfeedFacebook\Action;

class ONFDeactivate {

    public static function deactivate() {
        // Not relevant code ...
    }

    public static function unregister_admin_scripts() {
        add_action( 'admin_dequeue_scripts', array( 'Oppimittinetworking\OnfeedFacebook\Action\ONFDeactivate', "dequeue_admin" ) );
    }

    public static function unregister_wp_scripts() {
        // TODO
    }

    public static function dequeue_admin() {
        // Enqueue admin css files
        wp_dequeue_style( "onfeed_main_css" );
        wp_dequeue_style( "onfeed_shortcut_css" );
        wp_dequeue_style( "onfeed_feedspage_css" );

        // Enqueue admin js files
        wp_dequeue_script( "onfeed_main_js" );
        wp_dequeue_script( "onfeed_shortcut_js" );
        wp_dequeue_script( "onfeed_feedspage_js" );
    }

    public static function dequeue_wp() {
        // TODO
    }
}

我还要让大家知道，我已经检查过问题是否是由不正确的命名空间引起的，但是你如何才能看到这没有问题。

我还检查了此链接：

• 未捕获的类型错误：call_user_func_array()：参数#1（$function）必须是有效的回调

但问题依然存在。

提前感谢您的回复。

Answer 1

我已通过更新此行解决了该问题：

If ( class_exists( 'OnFeedMain' ) )

inside

onfeed.php

。
我忘记插入正确的命名空间：

If ( class_exists( 'OnFeedMain' ) )
    $onfmain = new OnFeedMain();

致：

If ( class_exists( 'Oppimittinetworking\OnfeedFacebook\OnFeedMain') )
    $onfmain = new OnFeedMain();