无法处理php电子邮件验证函数
我已经编写了一些代码来创建联系人表单，但是我尝试验证电子邮件字段，当我使用错误电子邮件的虚拟数据进行测试时，我使用的函数（filter_var（$email，filter_validate_email））不会得到处理。我将所有的php和html代码添加到一个文件中，以便于阅读，并且不会使事情复杂化 这是我的全部代码：无法处理php电子邮件验证函数,php,html,Php,Html,我已经编写了一些代码来创建联系人表单，但是我尝试验证电子邮件字段，当我使用错误电子邮件的虚拟数据进行测试时，我使用的函数（filter_var（$email，filter_validate_email））不会得到处理。我将所有的php和html代码添加到一个文件中，以便于阅读，并且不会使事情复杂化 这是我的全部代码： <?php // define variables and set to empty values $first_nameErr = $last_nameErr = $e
<?php
// define variables and set to empty values
$first_nameErr = $last_nameErr = $emailErr = $messageErr = "";
$first_name = $last_name = $email = $from = "";
if($_SERVER["REQUEST_METHOD"] == "POST"){
$to = "pdgcaracas@gmail.com"; // this is your Email address
// this is the sender's Email address
$first_name = $_POST['first_name'];
$last_name = $_POST['last_name'];
$from = $_POST['email'];
$subject = "Form submission";
$subject2 = "Copy of your form submission";
$message = $first_name . " " . $last_name . " wrote the following:" . "\n\n" . $_POST['message'];
$message2 = "Here is a copy of your message " . $first_name . "\n\n" . $_POST['message'];
$headers = "From:" . $from;
$headers2 = "From:" . $to;
if (empty($_POST["first_name"])){
$first_nameErr = " First name is required";
}
else if ((!preg_match("/^[a-zA-Z-' ]*$/",$first_name))) {
$first_nameErr = "Please type in only letters and whitespace";
}
else if(empty($_POST["last_name"])){
$last_nameErr = " Last name is required";
}
else if ((!preg_match("/^[a-zA-Z-' ]*$/",$last_name))) {
$last_nameErr = "Please type in only letters and whitespace";
}
else if (empty($_POST["email"])) {
$emailErr = "Email is required";
}
else if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
$emailErr = "Email is invalid";
}
else if (empty($_POST["message"])) {
$messageErr = "message is required";
}
else {
mail($to,$subject,$message,$headers);
mail($from,$subject2,$message2,$headers2); // sends a copy of the message to the sender
echo '<script>alert("Mail Sent. Thank you , we will contact you shortly.")</script>';
}
// You can also use header('Location: thank_you.php'); to redirect to another page.
}
?>
<!DOCTYPE HTML>
<!--
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-->
<html>
<head>
<title>Generic Page - Industrious by TEMPLATED</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no" />
<meta name="description" content="" />
<meta name="keywords" content="" />
<link rel="stylesheet" href="assets/css/main.css" />
</head>
<body class="is-preload">
<!-- Header -->
<header id="header">
<a class="logo" href="index.html">Test</a>
<nav>
<a href="#menu">Menu</a>
</nav>
</header>
<!-- Nav -->
<nav id="menu">
<ul class="links">
<li><a href="index.html">Home</a></li>
<li><a href="elements.html">Elements</a></li>
<li><a href="aboutme.html">About me</a></li>
</ul>
</nav>
<!-- Heading -->
<div id="heading" >
<h1>Contact Us</h1>
</div>
<!-- Main -->
<section id="main" class="wrapper">
<div class="inner">
<div class="content">
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
First Name: <input type="text" name="first_name">
<span class="error">* <?php echo $first_nameErr;?></span>
<br>
Last Name: <input type="text" name="last_name">
<span class="error">* <?php echo $last_nameErr;?></span><br>
Email: <input type="text" name="email">
<span class="error">* <?php echo $emailErr;?></span><br>
Message:<br><textarea rows="5" name="message" cols="30"></textarea>
<span class="error">* <?php echo $messageErr;?></span><br><br>
<input type="submit" name="submit" value="Submit">
</form>
</div>
</div>
</section>
<!-- Footer -->
<footer id="footer">
<div class="inner">
<div class="content">
<section>
<h3>Accumsan montes viverra</h3>
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</section>
<section>
<h4>Sem turpis amet semper</h4>
<ul class="alt">
<li><a href="#">Dolor pulvinar sed etiam.</a></li>
<li><a href="#">Etiam vel lorem sed amet.</a></li>
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</ul>
</section>
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<h4>Magna sed ipsum</h4>
<ul class="plain">
<li><a href="#"><i class="icon fa-twitter"> </i>Twitter</a></li>
<li><a href="#"><i class="icon fa-facebook"> </i>Facebook</a></li>
<li><a href="#"><i class="icon fa-instagram"> </i>Instagram</a></li>
<li><a href="#"><i class="icon fa-github"> </i>Github</a></li>
</ul>
</section>
</div>
<div class="copyright">
© Untitled. Photos <a href="https://unsplash.co">Unsplash</a>, Video <a href="https://coverr.co">Coverr</a>.
</div>
</div>
</footer>
<!-- Scripts -->
<script src="assets/js/jquery.min.js"></script>
<script src="assets/js/browser.min.js"></script>
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<script src="assets/js/util.js"></script>
<script src="assets/js/main.js"></script>
</body>
</html>
filter\u var仅在提供的$email有效时返回true。
要检查电子邮件是否无效，请按如下所示更改filter_var的if语句，它应该可以工作
//your code
if (!(filter_var($email, FILTER_VALIDATE_EMAIL))) {
$emailErr = "Email is invalid";
}
//your code
您分配$from=$\u POST['email']
但是你验证了$email
而不是$from
。太棒了！谢谢你的反馈，我不知道我是怎么错过的！您是否看到我的代码中可能遗漏的任何内容？我继续并将else if（filter\u var（$email，filter\u VALIDATE\u email））
更改为else if（filter\u var（$from，filter\u VALIDATE\u email））
，但它仍然没有验证。