如何使用gmail对PHP联系人表单进行身份验证

您希望使用现代PHP邮件库，如支持SMTP身份验证的SwiftMailer。

查看Google关于使用哪些服务器的说明和SwiftMailer关于向SSL/TLS SMTP服务器发送邮件以及使用用户名/密码组合发送邮件的文档。

在更新代码以使用SwiftMailer时，你应该抛弃讨厌的电子邮件验证正则表达式，它排除了许多完全有效的本地部分和域。通过使用方法调用来构建消息所带来的完整性将解决代码中大多数其他潜在问题，比如奇怪的clean_string函数——您不需要它(我不确定您认为它在这里做什么，但它实际上并没有使字符串更安全)。

你可以使用PHPMailer http://sourceforge.net/projects/phpmailer/，这里是如何使用GMail发送电子邮件，但是HTML&CSS在这里帮不了你。

function email($to, $subject, $body){
    require_once("class.phpmailer.php");
    $mail = new PHPMailer();
    $mail->SMTPAuth = true;
    $mail->SMTPSecure = "ssl";
    $mail->Host = "smtp.gmail.com";
    $mail->Port = 465;
    $mail->Username = "name@example";
    $mail->Password = "123456";
    $mail->SetFrom("name@example.com", "Name Example");
    $mail->Subject = $subject;
    $mail->Body = $body;
    $mail->AddAddress($to);
    $mail->Send();
    unset($mail);
}

我认为使用gmail;谷歌改变那里的身份验证方法，我能够成功地验证以下这一步:视频链接这是允许外部应用的2步过程

您将需要生成一个应用程序密码。

This is a complete working example.    
<?php
    // this is for troubleshooting errors 
    // set the 1 to 0 to turn off (must set to 0 when in production mode or when you run this live 
    error_reporting(E_ALL);
    ini_set('display_errors', '1');
?><?php
    if(isset($_POST['email'])) {
        $email_to       = $_POST['email'];
        $email_subject  = "E-mail from website visitor.";
        // try adding a useful/relevent message to errors output to users
        function died($error) {
            echo "We are very sorry, but there were error(s) found with the form you submitted:'n't ";
            echo $error."<br /><br />";
            echo "Please go back and fix these errors.<br /><br />";
            die();
        }
        // validation expected data exists
        // since all post are submit, check if they are empty or equal to an empty string
        if(isset($_POST['email'])){
            if($_POST['email'] == "" || $_POST['first_name'] == "" || $_POST['last_name'] == "" || $_POST['telephone'] == "" || $_POST['comments'] == ""){
                died('Please fill out the entire form');
            }
        }
        $first_name = $_POST['first_name']; // required
        $last_name  = $_POST['last_name']; // required
        $email_from = $_POST['email']; // required
        $telephone  = $_POST['telephone']; // not required
        $comments   = $_POST['comments']; // required
        $error_message = "";
        $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+'.[A-Za-z]{2,4}$/';
        $string_exp = "/^[A-Za-z .'-]+$/";
        if(!preg_match($email_exp,$email_from))
            $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
        if(!preg_match($string_exp,$first_name))
            $error_message .= 'The First Name you entered does not appear to be valid.<br />';
        if(!preg_match($string_exp,$last_name))
            $error_message .= 'The Last Name you entered does not appear to be valid.<br />';
        if(strlen($comments) < 2)
            $error_message .= 'The Message you entered do not appear to be valid.<br />';
        if(strlen($error_message) > 0)
            died($error_message);
        $email_message = "Form details below.'n'n";
        function clean_string($string) {
            $bad = array("content-type","bcc:","to:","cc:","href");
            return str_replace($bad,"",$string);
        }
        $email_message .= "First Name: ".clean_string($first_name)."'n";
        $email_message .= "Last Name: ".clean_string($last_name)."'n";
        $email_message .= "Email: ".clean_string($email_from)."'n";
        $email_message .= "Telephone: ".clean_string($telephone)."'n";
        $email_message .= "Comments: ".clean_string($comments)."'n";
        // create email headers
        // changed up your email a bit
        $headers = "From: $email_from'n";
        $headers.= "MIME-Version: 1.0'n";
        $headers .= "Content-type: text/html; charset=iso-8859-1'n";
        mail($email_to, $email_subject, $email_message, $headers);
        header('Location: http://www.cnn.com');
        exit();
    }
?>
<form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
    Firstname:<br>
    <input type="text" name="first_name"><br>
    Lastname:<br>
    <input type="text" name="last_name"><br>
    Email:<br>
    <input type="text" name="email"><br>
    Phone Number:<br>
    <input type="text" name="telephone"><br>
    Comments:<br>
    <input type="textarea" name="comments"><br><br>
    <input type="submit" value="Submit">
</form>