PHP Form Review - Cc and Bcc not working - php

Question

I have an html form the links to a PHP email. The form works well, but I am having trouble with the Cc and Bcc not coming through.
Here is the entire code. Please review and help me understand what I am getting wrong on the Cc and Bcc parts in the headers.
Thanks:
<?php
$emailFromName = $_POST['name'];
$emailFrom = $_POST['email'];
$emailFromPhone = $_POST['phone'];
$email9_11 = $_POST['9-10'];
$email10_11 = $_POST['10-11'];
$email11_12 = $_POST['11-12'];
$email12_1 = $_POST['12-1'];
if (empty($emailFromName)) {
echo 'Please enter your name.';
} elseif (!preg_match('/^([A-Z0-9\.\-_]+)#([A-Z0-9\.\-_]+)?([\.]{1})([A-Z]{2,6})$/i', $emailFrom) || empty($emailFrom)) {
echo 'The email address entered is invalid.';
} else {
$emailTo = "main#gmail.com" ;
$subject = "Family History Conference Registration";
if (!empty($emailFrom)) {
$headers = 'From: "' . $emailFromName . '" <' . $emailFrom . '>';
} else {
$headers = 'From: Family History Conference <noreply#domain.org>' . "\r\n";
$headers .= 'Cc: $emailFrom' . "\r\n";
$headers .= 'Bcc: myemail#domain.com' . "\r\n";
}
$body = "From: ".$emailFromName."\n";
$body .= "Email: ".$emailFrom."\n";
$body .= "Phone: ".$emailFromPhone."\n\n";
$body .= "I would like to attend the following classes.\n";
$body .= "9:10 to 10:00: ".$email9_11."\n";
$body .= "10:10 to 11:00: ".$email10_11."\n";
$body .= "11:10 to 12:00: ".$email11_12."\n";
$body .= "12:10 to 1:00: ".$email12_1."\n";
/* Send Email */
if (mail($emailTo, $subject, $body, $headers)) {
echo "<h2>Thank you for Registering</h2>
<h3>You have registered for the following classes</h3>
<p>9:10 to 10:00am: \"$email9_11\" <br />
10:10 to 11:00am: \"$email10_11\"<br />
11:10 to 12:00: \"$email11_12\"<br />
12:10 to 1:00: \"$email12_1\"</p>
<p>We look forward to seeing you October 31, 2010</p>";
} else {
echo 'There was an internal error while sending your email.<br>';
echo 'Please try again later.';
}
}
?>

Answer 1

You're using single quotes
$headers .= 'Cc: $emailFrom' . "\r\n";
PHP won't interpret variables inside single quotes, you must use double quotes
$headers .= "Cc: $emailFrom\r\n";