form to email PHP script

I have this simple script I found online but it does not work. What am I missing?

<?php
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'];
$visitor_email = $_POST['email'];
$message = $_POST['message'];


$email_from = $visitor_email;
$email_subject = "New Message";
$email_body = "You have received a new message from $name.\n".
    "\n\n $message".

$to = "myemail@domain.com";
$headers = "From: $email_from \r\n";
$headers .= "Reply-To: $visitor_email \r\n";

try{
    mail($to,$email_subject,$email_body,$headers);
    //done. redirect to thank-you page.
    header('Location: thank-you.html');
} catch(Exception $e){
    //problem, redirect to sorry page
    header('Location: sorry.html');
}       
?>

I am always redirected to the thank-you page but I do not get any emails. All HTML stuff are correct.

Solution

Assuming you have a form similar to the following with named fields: (input fields must be named).

<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>

<form method="post" action="handler.php">

Name: 
<input type="text" name="name" /> <br/>

Your Email: 
<input type="text" name="email" /> <br/>

Message: <br>
<textarea id="body" name="message" cols="100" rows="20"></textarea><br/>
<input type="submit" name="submit" value="Send Email" />

</body>
</html>

This line would cause you problems because of the dot at the end of $message.

$email_body = "You have received a new message from $name.\n".
"\n\n $message".

The dot should be a semi-colon ; such as:

$email_body = "You have received a new message from $name.\n".
"\n\n $message";

In testing, the message I typed did not come through until changed to a semi-colon.

This line echo "error; you need to submit the form!"; should be a die() directive in order to stop executing.

Such as: die("Error. You need to submit the form."); or you could use exit; under your echo also.

Such as:

echo "error; you need to submit the form!";
exit;

PHP (handler.php)

Tested and working on my end using the form shown above.

<?php
if(!isset($_POST['submit']))
{
//This page should not be accessed directly. Need to submit the form.
// echo "Error. You need to submit the form.";
// exit;
    die("Error. You need to submit the form.");
}
$name = $_POST['name'];
$visitor_email = $_POST['email'];
$message = $_POST['message'];

$email_from = $visitor_email;
$email_subject = "New Message";
$email_body = "You have received a new message from $name.\n".
    "\n\n $message";

$to = "myemail@domain.com";
$headers = "From: $email_from \r\n";
$headers .= "Reply-To: $visitor_email \r\n";

try{
    mail($to,$email_subject,$email_body,$headers);
    //done. redirect to thank-you page.
// header('Location: thank-you.html');

echo "Success"; // My echo test

} catch(Exception $e){
    //problem, redirect to sorry page
// header('Location: sorry.html');

echo "Sorry"; // My echo test
}       
?>