我的网站上有一个表格,我从人们那里收到了大量的空邮件,我想我只是按发送而不实际填写表格,这有点烦人,我对 PHP 的了解非常有限,我很想知道我需要什么更改为停止接收空邮件。表单和PHP的代码如下。
<form method="post" action="contact.php">
<fieldset>
<legend>Contact us:</legend>
<input type="text" name="sender" placeholder="Name *">
<input type="text" name="senderEmail" placeholder="Email *">
<textarea name="message" placeholder="Message" rows="5" cols="95"></textarea>
</fieldset>
<input type="submit" value="Send" name="submit" />
</form>
<?php
if($_POST["submit"]) {
$recipient="example@example.com";
$subject="New email from form";
$sender=$_POST["sender"];
$senderEmail=$_POST["senderEmail"];
$message=$_POST["message"];
$mailBody="Name: $sender\nEmail: $senderEmail\n\n$message";
mail($recipient, $subject, $mailBody, "From: $sender <$senderEmail>");
$thankYou="<p>Thanks! Your message has been sent.</p>";
}