PHP消息发送“未定义”

Question

I have mail.php which sends out an email. This is the code I'm using.

<?php
if(isset($_POST['submit'])){
$to      = $_POST['email'];
$subject = 'Your Results!';
$message = $_POST['message'];    
$headers = 'From: [e-mail]' . "
" .
'Reply-To: [e-mail]' . "
" .
'X-Mailer: PHP/' . phpversion();

//mail($to, $subject, $message, $headers); 
//header("Location: thankyou.php");
echo $message;
}
?> 

The contents of the email is supposed to the .innerText of of a div I have on my index.php page. If I echo out the message, then the output appears the page (mail.php) but when I comment/uncomment the necessary parts to email myself the message I receive is just "undefined".

Is $message not defined?

Here is the form and javascript I'm using

<form action="mail.php" method="post" onsubmit="this.message.value = document.getElementById('box').innerText;">
<input type="email" name="email" required>
<input id="content" type="hidden" name="message" value="">   
<input type="submit" name="submit">    
</form>

Answer 1

Change .innerText to .textContent. .innerText is a nonstandard property that doesn't exist in Firefox.

I don't know why you didn't have the same problem when used echo $message in the PHP script, unless you tested that version of the script with a different browser (always try to minimize the number of differences when you're testing like this).