忘记密码不起作用

我有一些代码来处理用户忘记密码但无法工作的情况。当用户继续操作时，消息不会发送到他们的电子邮件中。怎么了？

这是PHP 中的代码

require_once 'includes/definitions.php';
require_once FUNCS_DIR . 'core.functions.php';
$pid = 13;
$template->assign(PAGE_TITLE, $langs[47]);
$template->assign(PAGE_ID, $pid);
/* Rendering template */
$errors = array();
$step = 1;
$reset_code = null;
if(empty($_POST) == false) {
    if(isset($_POST['email'])) {
        $email = $_POST['email';
        if (email_exists($email) == false)
            $errors[] = $langs[264];
        if (empty($errors)) {
            $reset_code = md5($_POST['email'] + microtime());
            update_email_code($email, $reset_code);
            $data['reset_link'] = get_setting('base_url') . 'forgot_password?reset_code=' . $reset_code;
            send_email_template('forgot_password.tpl', $data, $email, get_setting('site_name') . ' - Password Reset');
        }
    }else{
        $password = $_POST['password'];
        $password_repeat = $_POST['password_repeat'];
        $reset_code = $_POST['reset_code'];
        $member_data = get_member_email_code($reset_code);
        $step = 2;
        if($member_data == false)
            $errors[] = $langs[265];
        if($password != $password_repeat)
            $errors[] = $langs[266];
        if(strlen($password) < get_setting('min_pass_length'))
            $errors[] = $langs[267];
        if(!preg_match('/[A-Z]/', $password))
            $errors[] = $langs[268];
        if (!preg_match('#[0-9]#', $password))
            $errors[] = $langs[269];
        if(empty($errors)){
            $password_hash = hash('sha256', $password);
            if(update_password($member_data['members_id'], $password_hash)){
                redirect('login?pr=true');
            }else{
                $errors[] = $langs[270];
            }
        }
    }
}
if(empty($_GET) == false){
    $reset_code = $_GET['reset_code'];
    $member_data = get_member_email_code($reset_code);
    if(empty($reset_code)){
        $errors[] = $langs[271];
    }else if($member_data == false){
        $errors[] = $langs[272];
    }
    if(empty($errors)){
        $step = 2;
    }
}
$template->assign('reset_code', $reset_code);
$template->assign('errors', $errors);
$template->assign('step', $step);
$template->display($current_template . 'forgot_password.tpl');