我正在WordPress上设置付费会员页面。它使用一个表单来获取信用卡信息和电子邮件地址，然后运行该卡并在成功后设置一个新用户。我可以运行该卡，并创建一个新用户，但它不会向他们发送欢迎电子邮件，以便他们可以建立自己的密码。

我已经尝试为这个PHP页面找到包含文件的正确组合（使用echo语句查看代码中断的位置），并通过在页面顶部包含它们来解决了许多缺少的函数，但我仍然得到“致命错误：在/[…]中的非对象上调用成员函数get（）”/wp包括/缓存。这是我创建的用于发送通知电子邮件的代码：

require_once(\'../wp-includes/capabilities.php\');
require_once(\'../wp-includes/cache.php\');
require_once(\'../wp-includes/option.php\');
require_once(\'../wp-includes/pluggable.php\');
require_once(\'../wp-includes/plugin.php\');
require_once(\'../wp-includes/formatting.php\');
function setWP($username){
    global $wpdb, $wp_hasher;
    echo("Globals<br />");

    $user_login=$username;
    echo($user_login."<br />");

    if(empty($user_login)){
        return false;
    }else if(strpos($user_login, \'@\')){
        $user_data=get_user_by(\'email\', trim($user_login));
        if(empty($user_data))
            return false;
    }else{
        $login=trim($user_login);
        $user_data=get_user_by(\'login\', $login);
    }
    echo("user_login<br />");

    do_action(\'lostpassword_post\');


    if(!$user_data) return false;

    // redefining user_login ensures we return the right case in the email
    $user_login=$user_data->user_login;
    $user_email=$user_data->user_email;

    do_action(\'retreive_password\', $user_login);  // Misspelled and deprecated
    do_action(\'retrieve_password\', $user_login);
    echo("retrieve_password<br />");

    $allow=apply_filters(\'allow_password_reset\', true, $user_data->ID);

    if(!$allow)
        return false;
    else if(is_wp_error($allow))
        return false;
    echo("allow<br />");

    $key=wp_generate_password(20, false);
    do_action(\'retrieve_password_key\', $user_login, $key);

    if(empty($wp_hasher)){
        require_once ABSPATH . \'wp-includes/class-phpass.php\';
        $wp_hasher=new PasswordHash(8, true);
    }
    $hashed=$wp_hasher->HashPassword($key);
    $wpdb->update($wpdb->users, array(\'user_activation_key\' => $hashed), array(\'user_login\' => $user_login));
    echo("hashed<br />");

    $message=__(\'Welcome!\') . "\\r\\n\\r\\n";
    $message .= __(\'If you did not request a training series, send an email to [email protected].\') . "\\r\\n\\r\\n";
    $message .= __(\'As a new student, you will need to set a password. Visit the following address:\') . "\\r\\n\\r\\n";
    $message .= \'<\' . network_site_url("wp-login.php?action=rp&key=$key&login=" . rawurlencode($user_login), \'login\') . ">\\r\\n";
    $message .= sprintf(__(\'Username: %s\'), $user_login) . "\\r\\n\\r\\n";

    if(is_multisite())
        $blogname=$GLOBALS[\'current_site\']->site_name;
    else
        $blogname=wp_specialchars_decode(get_option(\'blogname\'), ENT_QUOTES);
    echo("is_multisite<br />");

    $title=sprintf(__(\'[%s] Password Reset\'), $blogname);

    $title=apply_filters(\'retrieve_password_title\', $title);
    $message=apply_filters(\'retrieve_password_message\', $message, $key);
    echo("Prep to send<br />");

    if($message && !wp_mail($user_email, $title, $message))
        echo(\'The e-mail could not be sent.\');
    else
        echo("Message sent.");

}