PHP mail sending duplicates with different timestamp
I've got a PHP/AJAX form on my site at http://www.brianrhea.com (click Request Project)
When I test the form from multiple computers, it works fine for me. However, I will sporadically receive a duplicate e-mail and have heard from at least one user who tried to submit that it gave them an alert error which I am unable to duplicate.
This is the PHP that I'm using. Is there anything that stands out as a potential issue?
<?php
//Retrieve form data.
//GET - user submitted data using AJAX
//POST - in case user does not support javascript, we'll use POST instead
$name = ($_GET['name']) ? $_GET['name'] : $_POST['name'];
$email = ($_GET['email']) ?$_GET['email'] : $_POST['email'];
$subject = ($_GET['subject']) ?$_GET['subject'] : $_POST['subject'];
$comments = ($_GET['comments']) ?$_GET['comments'] : $_POST['comments'];
//flag to indicate which method it uses. If POST set it to 1
if ($_POST) $post=1;
//Simple server side validation for POST data, of course, you should validate the email
if (!$name) $errors[count($errors)] = 'Please enter your name.';
if (!$email) $errors[count($errors)] = 'Please enter your email.';
if (!$subject) $errors[count($errors)] = 'Please choose a subject.';
if (!$comments) $errors[count($errors)] = 'Please enter your comments.';
//if the errors array is empty, send the mail
if (!$errors) {
//recipient
$to = '开发者_StackOverflow社区brianrhea@gmail.com';
//sender
$from = $name . ' <' . $email . '>';
//subject and the html message
$subject = 'Comment from ' . $name;
$message = '
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head></head>
<body>
<table>
<tr><td>Name</td><td>' . $name . '</td></tr>
<tr><td>Email</td><td>' . $email . '</td></tr>
<tr><td>Subject</td><td>' . $subject . '</td></tr>
<tr><td>Comments</td><td>' . nl2br($comments) . '</td></tr>
</table>
</body>
</html>';
//send the mail
$result = sendmail($to, $subject, $message, $from);
//if POST was used, display the message straight away
if ($_POST) {
if ($result) echo 'Thank you! We have received your message.';
else echo 'Please verify that you have entered a valid email address.';
//else if GET was used, return the boolean value so that
//ajax script can react accordingly
//1 means success, 0 means failed
} else {
echo $result;
}
//if the errors array has values
} else {
//display the errors message
for ($i=0; $i<count($errors); $i++) echo $errors[$i] . '<br/>';
echo '<a href="form.php">Back</a>';
exit;
}
//Simple mail function with HTML header
function sendmail($to, $subject, $message, $from) {
$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=iso-8859-1" . "\r\n";
$headers .= 'From: ' . $from . "\r\n";
$result = mail($to,$subject,$message,$headers);
if ($result) return 1;
else return 0;
}
?>
This code does not appear to send the mail twice.
- Try to search for other places in your application where this code/functions maybe called from.
- Check also if you have a refresh prevention - if you detect ajax requests send very close in time with the same data, or against of some sort of double click usage.
加载中,请稍侯......
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