如何让我当前的 PHP 联系表单检查输入的电子邮件地址是否有效？

Question

固定：

我的代码中有一个小错误，我在电子邮件输入中以某种方式将 "type" 更改为 "text"，它应该是

type="email"

和不

type="text"

我制作了一个 php 联系表格，我在我制作的网站上使用它并且一切正常。

我以为表单是在检查是否输入了电子邮件地址，但我现在意识到人们可以只在电子邮件输入中输入他们的名字而不是完整的电子邮件地址（即带有 @ 符号和 .com 或 . co.uk最后)

我不太擅长 PHP 所以我试过了，但是尽管我添加了声明，但我没有输入有效电子邮件地址的表单中的电子邮件似乎仍然通过了

我尝试定义一些错误变量并设置为空值，如下所示：

$nameErr = $emailErr = $genderErr = $websiteErr = "";

然后将这些 if else 语句添加到我的表单 php：

if (empty($_POST["email"])) {
$emailErr = "Email is required";
} else {
$email = test_input($_POST["email"]);
}

所以我的代码如下所示：

<?php 

    $name = ($_POST['name']);
    $email = ($_POST['email']);
    $message = ($_POST['message']);
    $from = ($_POST['email']);
    $to = 'me@myemailaddress.co.uk'; 
    $subject = "Enquiry from Visitor " . $name;
    $human = ($_POST['human']);

   $headers = 'From: ' . $email . "\r\n" .
   'Reply-To: ' . $email . "\r\n" .
   'X-Mailer: PHP/' . phpversion();


?>

<div class="container-fluid">
<div class="about-msg">
<h2>CONTACT US</h2>

<div class="container-fluid contactform">
<div class="col-md-7 contactform-padding">
<br>    
<h1>GET IN TOUCH</h1>
<p>Please drop us a message if you have any enquires. We always aim to reply 
within 24 hours.</p>
<?php 
    if (isset($_POST['submit']) && $human == '4') { 
    if (mail ($to, $subject, $message, $headers)) { 
    if (empty($_POST["email"])) {               
       $emailErr = "Email is required";
       } else {
     $email = test_input($_POST["email"]);
     }
    echo '<p>Thanks for getting in touch. Your message has been sent & we 
will get back to you shortly!</p>';
} else { 
    echo '<p>Something went wrong, go back and try again!</p>'; 
} 
    } else if (isset($_POST['submit']) && $human != '4') {
echo '<p>You answered the anti-spam question incorrectly!</p>';
    } 
?>
<form method="post" action="contact-us.php" data-ajax="false" method="POST" 
enctype="multipart/form-data">
<div class="row">
<div class="form-group col-md-6">
<label class="control-label " for="name">
<b>NAME</b>
</label>
<input class="form-control" id="name" name="name" type="text" 
placeholder="name">
</div>


<div class="form-group col-md-6">
<label class="control-label requiredField" for="email">
<b>EMAIL</b>
<span class="asteriskField">
*
</span>
</label>
<input class="form-control" id="email" name="email" placeholder="email" 
type="text"/>
</div>
</div>
<div class="row">
<div class="form-group col-md-12">
<label class="control-label requiredField" for="contact-subject">
<b>SUBJECT</b></label>
<input type="text" name="subject" class="contact-subject form-control" 
id="contact-subject" placeholder="subject">
</div>
</div>


<div class="form-group">
<label class="control-label " for="message">
<b>MESSAGE</b>
</label>
<textarea class="form-control" cols="40" id="message" name="message" 
rows="10" style="height: 275px !important;"></textarea>
</div>
<div class="form-group">

<label><b>*What is 2+2? (Anti-spam)</b></label>
<input name="human" placeholder="Type Here"></div>
<br>
<button class="btn btn-success" name="submit" type="submit" value="submit">
SEND
</button>
</form>


</div>

然而，尽管将我的电子邮件地址作为我的名字，这让我可以发送电子邮件！

有人可以看一下我是否将代码放在正确的位置或就如何修复它提出建议吗？我只是在学习 PHP 所以我的代码可能有错误，或者可能需要取出 if 语句来提交？

感谢您的帮助！

Answer 1

你可以选择 regex 但这也是一个 option

Answer 2

使用PHP Filter Validation

$email_b = "me@myemailaddress.co.uk";

if (filter_var($email_b, FILTER_VALIDATE_EMAIL)) {
    echo "This ($email_b) email address is considered valid.\n";
} else {
    echo "This ($email_b) email address is considered invalid.\n";
}

Answer 3

我想您希望用户输入有效的电子邮件地址，对吗？您可以将类型更改为电子邮件

<input class="form-control" id="email" name="email" placeholder="email" type="email"/>

如何让我当前的 PHP 联系表单检查输入的电子邮件地址是否有效？

How to make my current PHP contact form check the email address input is valid?

php

html

forms

contact-form