Reply-to email in PHP error - php

Question

When a user inputs their email on a form on my site, I get an email with their info. I'd like to be able to reply to that email and have their email autofill in "To:" but I'm having trouble. I found this question and tried the solution: reply-to address in php contact form but it's not working for me, and I'm not sure why.
Here is my PHP:
<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
$to = 'amanda#myemail.com';
$headers = "BCC: clients#myemail.com\r\n";
$headers .= 'Reply-To: ' . $email . "\r\n";
$subject = '*** Quote Request';
$name = $_POST['name'];
$phone = $_POST['phone'];
$date = $_POST['date'];
$time = $_POST['time'];
$pickup = $_POST['pickup'];
$dropoff = $_POST['dropoff'];
$passengers = $_POST['passengers'];
$service = $_POST['service'];
$email = $_POST['email'];
$message = <<<EMAIL
Quote submission from: $name
Name: $name
Phone Number: $phone
Date: $date
Time: $time
Pickup Location: $pickup
Drop Off Location: $dropoff
Total Passengers: $passengers
Service needed: $service
Email: $email
EMAIL;
if($_POST) {
mail($to, $subject, $message, $headers);
}
header('Location: thankyou.html');
exit();
?>
And this is the error message I'm getting, summed up:
Undefined variable: email in /contact-form-handler.php on line 9 Warning: Cannot modify header information - headers already sent by (output started at /contact-form-handler.php:9) in /contact-form-handler.php on line 44
The problem is the variable $email because if I put a Reply-To and specify an email, it works. I thought maybe it was because the variable is defined after I call it in the header, but adding it to the bottom didn't work. I'm a rookie with PHP so I'm not sure why this variable isn't working.
I also tried:
$headers = "BCC: clients#myemail.com\r\n" .
'Reply-To: ' . $email . "\r\n" .
'X-Mailer: PHP/' . phpversion();
Any help would be appreciated!

Answer 1

You use a variable before you define it!
Move this block to the top of your script:
$name = $_POST['name'];
$phone = $_POST['phone'];
$date = $_POST['date'];
$time = $_POST['time'];
$pickup = $_POST['pickup'];
$dropoff = $_POST['dropoff'];
$passengers = $_POST['passengers'];
$service = $_POST['service'];
$email = $_POST['email'];
Like that:
<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
$name = $_POST['name'];
$phone = $_POST['phone'];
$date = $_POST['date'];
$time = $_POST['time'];
$pickup = $_POST['pickup'];
$dropoff = $_POST['dropoff'];
$passengers = $_POST['passengers'];
$service = $_POST['service'];
$email = $_POST['email'];
$to = 'amanda#myemail.com';
$headers = "BCC: clients#myemail.com\r\n";
$headers .= 'Reply-To: ' . $email . "\r\n";
$subject = '*** Quote Request';
$message = <<<EMAIL
Quote submission from: $name
Name: $name
Phone Number: $phone
Date: $date
Time: $time
Pickup Location: $pickup
Drop Off Location: $dropoff
Total Passengers: $passengers
Service needed: $service
Email: $email
EMAIL;
if($_POST) {
mail($to, $subject, $message, $headers);
}
header('Location: thankyou.html');
exit();
?>

Answer 2

seems like you don't receive $_POST['email']; from your contact form (re: "Undefined variable: email ")
check the name of your mail input field...