即使电子邮件地址无效，我的邮件表单仍在发送电子邮件。例如，如果我将电子邮件填写为“bob”，然后点击提交，我的 javascript 验证器会发出警告消息，但电子邮件仍然可以通过。它以 bob@mydomain.com 的形式出现在我的垃圾邮件箱中
如何验证电子邮件地址，并在未验证时阻止提交？
我是 php 新手。
HTML：
<div id="emailform">
<h2>Confirm your purchase information</h2>
<hr>
<form method="post" name="contactform" action="mail_form.php" id="submit">
<p>
<label for='name'>Your Name:</label> <br>
<input type="text" name="name">
</p>
<p>
<label for='email'>Email Address:</label> <br>
<input type="text" name="email">
</p>
<p>
<label for='purchasecode'>Purchase Code:</label> <br>
<input type="text" name="purchasecode">
</p>
<p>
<label for='vendor'>Vendor Name:</label> <br>
<select name="vendor">
<option value="" selected="selected"></option>
<option value="Amazon" >Amazon</option>
<option value="Barnes&Noble" >Barnes & Noble</option>
<option value="Family Christian" >Family Christian</option>
<option value="Christianbook" >Christianbook.com</option>
<option value="LifeWay" >LifeWay</option>
<option value="BAM" >Books-A-Million</option>
<option value="Mardel" >Mardel</option>
</select>
</p>
<button type="submit" id="submitbutton" name="submit" value="Submit" class="mainButton">SUBMIT</button><br>
</form>
<!-- Code for validating the form
Visit http://www.javascript-coder.com/html-form/javascript-form-validation.phtml
for details -->
<script type="text/javascript">
var frmvalidator = new Validator("contactform");
frmvalidator.addValidation("name","req","Please provide your name");
frmvalidator.addValidation("email","email","Please enter a valid email address");
frmvalidator.addValidation("vendor","dontselect=000");
frmvalidator.addValidation("purchasecode","maxlen=50");
</script>
</div>
PHP：
<?php
ini_set('display_errors',1);
error_reporting(E_ALL);
if(!isset($_POST['submit']))
{
//This page should not be accessed directly. Need to submit the form.
echo "error; you need to submit the form!";
}
$name = $_POST['name'];
$email = $_POST['email'];
$purchasecode = $_POST['purchasecode'];
$vendor = $_POST['vendor'];
//Validate first
if(empty($_POST['name']) ||
empty($_POST['email']) ||
empty($_POST['purchasecode']) ||
empty($_POST['vendor']))
{
echo "All fields are required.";
exit;
}
if(IsInjected($email))
{
echo "Bad email value!";
exit;
}
$email_from = $email;
$email_subject = "GDFY Purchase Confirmation";
$email_body = "New purchase confirmation from $name.\n".
"Here are the details:\n\n Name: $name \n\n Email: $email \n\n Purchase Code: $purchasecode \n\n Vendor: $vendor";
$to = "idc615@gmail.com";//<== update the email address
$headers = "From: $email_from \r\n";
$headers .= "Reply-To: $email_from \r\n";
//Send the email!
mail($to,$email_subject,$email_body,$headers);
//done. redirect to thank-you page.
header('Location: index.html');
// echo "success";
// Function to validate against any email injection attempts
function IsInjected($str)
{
$injections = array('(\n+)',
'(\r+)',
'(\t+)',
'(%0A+)',
'(%0D+)',
'(%08+)',
'(%09+)'
);
$inject = join('|', $injections);
$inject = "/$inject/i";
if(preg_match($inject,$str))
{
return true;
}
else
{
return false;
}
}
?>
Javascript：
$('#submit').submit(function() { // catch the form's submit event
$.ajax({ // create an AJAX call...
data: $(this).serialize(), // get the form data
type: $(this).attr('method'), // GET or POST
url: $(this).attr('action'), // the file to call
success: function(response) { // on success..
$('#emailform').html("<h2 style='text-align:center;'>Thank you!</h2><hr><p style='text-align:center;'>Thank you for submitting your purchase information.<br>We will send your free gifts soon!</p>"); // update the DIV
}
});
return false; // cancel original event to prevent form submitting
});