这是我第一次接触WP Development，我正在尝试在注册后不显示WP管理栏。因为它是名为“show\\u admin\\u bar-front”的元数据，所以我会在创建用户后立即更新它。

 if(count($error) == 0) {
            wp_create_user( $username, $password, $email);
            $user_id = get_current_user_id();
            update_user_meta($user_id, \'show_admin_bar_front\', \'false\');
            echo "User Created Successfully!";
            exit();
        }

如您所见，在上面的区块中，我尝试在创建用户并更新指向的元数据后立即获取用户ID（默认为“true”）。也许我在做一些很愚蠢的事。有人能启发我吗？Bellow，完整代码。

 <?php
    /*
    Template Name: Registration
    */
    get_header();
    global $wpdb;

    if($_POST) {

        $username = $wpdb->escape($_POST[\'txtUsername\']);
        $email = $wpdb->escape($_POST[\'txtEmail\']);
        $password = $wpdb->escape($_POST[\'txtPassword\']);
        $ConfPassword = $wpdb->escape($_POST[\'txtConfirmPassword\']);


    $error = array();
        if(strpos($username, \'\') !==FALSE) {
            $error[\'username_space\'] = "Username has space!";
        }

        if(empty($username)) {
            $error[\'username_empty\'] = "Username is empty!";
        }

        if(username_exists($username)) {
            $error[\'username_exists\'] = "Username already exists!";
        }

        if(!is_email($email)) {
            $error[\'email_valid\'] = "Please, add a valid e-mail.";
        }

        if(email_exists($email)) {
            $error[\'email_existence\'] = "This e-mail is already registered.";
        }

        if(strcmp($password, $ConfPassword) !==0) {
            $error[\'password\'] = "Password don\'t match!";
        }

        if(count($error) == 0) {
            wp_create_user( $username, $password, $email);
            $user_id = get_current_user_id();
            update_user_meta($user_id, \'show_admin_bar_front\', \'false\');
            echo "User Created Successfully!";
            exit();
        } else {
            print_r($error);
        }
    }

    ?>

    <form method="post">

        <p>
            <label>Username</label>
            <div>
                <input type="text" id="txtUsername" name="txtUsername" placeholder="Username"/>
            </div>
        </p>

        <p>
            <label>Email</label>
            <div>
                <input type="email" id="txtEmail" name="txtEmail" placeholder="Email"/>
            </div>
        </p>

        <p>
            <label>Password</label>
            <div>
                <input type="password" id="txtPassword" name="txtPassword" placeholder="Password"/>
            </div>
        </p>

        <p>
            <label>Confirm Password</label>
            <div>
                <input type="password" id="txtConfirmPassword" name="txtConfirmPassword" placeholder="Confirm Password"/>
            </div>
        </p>

        <input type="submit" name="btnSubmit"/>

    </form>

add_action(\'register_new_user\',\'my_update_meta\',10,1);


function my_update_meta($user_id){

 update_user_meta($user_id, \'show_admin_bar_front\', false);


}