如何使用 php 验证电子邮件地址？ [复制]

Posted 2023-02-22

【中文标题】如何使用 php 验证电子邮件地址？ [复制]

【英文标题】：How to validate an email address with php? [duplicate]

【发布时间】：2014-06-07 11:53:54

【问题描述】：

我开始尝试编写一个 php 脚本来验证用户在我的表单中输入的电子邮件地址。 有人可以帮我完成吗？提前致谢。对你的帮助表示感谢 ：） 注意：请不要告诉我使用 javascript 或 jQuery。我需要用 php 做到这一点：/

<?php
$mail = $_POST['mail'];
$formcontent = "Email: $mail";
$recipient = "[e-mail]";
$subject = "Mail that uploaded picture";
$mailheader = "From: my website";

if ($mail == "")
echo "Please enter a valid email address. We want to contact you using your email address. Do not worry, nobody will be able to see it.";


else
mail($recipient, $subject, $formcontent, $mailheader) or die("Error!");
echo 'Your email address has been successfully added to your photo !<br>We will contact you later to tell you how to win the $50 000 :)<br><br>';

?>

【问题讨论】：

那么可能是重复的:)

查看***.com/questions/201323/…并决定发送确认电子邮件进行验证

不要使用正则表达式。使用这个：***.com/a/12026873/362536

【参考方案1】：

像这样：

$email = '[e-mail]';
if (filter_var($email, FILTER_VALIDATE_EMAIL))
    echo 'Email OK';

在您的源代码中：

$mail = $_POST['mail'];
$formcontent = "Email: $mail";
$recipient = "[e-mail]";
$subject = "Mail that uploaded picture";
$mailheader = "From: my website";

if (!filter_var($mail, FILTER_VALIDATE_EMAIL))
    echo "Please enter a valid email address. We want to contact you using your email address. Do not worry, nobody will be able to see it.";
 else 
    mail($recipient, $subject, $formcontent, $mailheader) or die("Error!");
    echo 'Your email address has been successfully added to your photo !<br>We will contact you later to tell you how to win the $50 000 :)<br><br>';
    

【讨论】：

我不知道为什么这被否决了。

也许其他人想要积分，请为正确答案投赞成票：)

根据票数，它没有被否决。

@Brad 那是我发表第一条评论的时候。否则，我不会这么说;-)

@Fred-ii- 我相信你......只是指出来。也许有人快速或错误地投票。速射***！

【参考方案2】：

理想情况下，您还应该检查 $_POST['mail'] 是否已定义，因为您会收到错误/通知，具体取决于您的 error_reporting 级别和 display_errors。

更新代码：

if (!isset($_POST['mail']) || !filter_var($_POST['mail'], FILTER_VALIDATE_EMAIL)) 
    echo "Please enter a valid email address. We want to contact you using your email address. Do not worry, nobody will be able to see it.";
 else 
    $mail = $_POST['mail'];
    $formcontent = "Email: $mail";
    $recipient = "[e-mail]";
    $subject = "Mail that uploaded picture";
    $mailheader = "From: my website";

    mail($recipient, $subject, $formcontent, $mailheader) or die("Error!");
    echo 'Your email address has been successfully added to your photo !<br>We will contact you later to tell you how to win the $50 000 :)<br><br>';

【讨论】：

您的建议是if ($mail == "" || !filter_var($mail, FILTER_VALIDATE_EMAIL))，但条件中不需要$mail == ""。

好电话，我已经更新了代码以检查是否实际设置了 $_POST['mail']。