无法激活我的帐户

我正在努力保护我的成员系统。因此，如果有人想创建一个帐户，他需要通过电子邮件激活它。

现在，当我收到一封带有激活码的电子邮件时：他说We cannot find that email这很奇怪，因为电子邮件在数据库中。

我得到了一个名为activate.php 的脚本

<?php
if (isset($_GET['succes']) === true && empty ($_GET['succes']) === true) {
?>
    <h2>Thanks, your account has been activated!</h2>
<?php
} else if (isset($_GET['email'], $_GET['email_code']) === true) {
    $email  = trim($_GET['email']);
    $email_code = trim($_GET['email_code']);
    $user = new User();
    if($user->email_exists($email) === false) {
        echo 'We cannot find that email';
    } else if ($user->activate($email, $email_code) === false) {
        echo 'problem activate your account';
    }
}
?>

在classes目录中，我得到了一个名为User.php的文件激活功能

function activate ($email, $email_code) {
    $email  = mysql_real_escape_string($email);
    $email_code = mysql_real_escape_string($email_code);
    require_once '../config.php';
    if ($db->get($db->query("SELECT COUNT(`id`) FROM `users` WHERE `email` = '$email' AND `email_code` = '$email_code' AND `active` = 0"), 0) == 1) {
        $db->query("UPDATE `users` SET `group` = 1 WHERE `email` = '$email'");
        return true;
    } else {
        return false;
    }
}

以及email_exists函数：

function email_exists($email) {
return ($this->_db->get($this->_db->query("SELECT COUNT(`id`) FROM `users` WHERE `email` = '$email'"), 0) == 1) ? true : false;
}