How to send form data to multiple email addresses using PHP?
<form id="player" method="post" action="process.php">

    <label for="name">Your Name</label>
    <input type="text" name="name" title="Enter your name" class="required">

    <label for="phone">Daytime Phone</label>
    <input type="tel" name="phone" class="required">

    <label for="email">Email</label>
    <input type="email" name="email" title="Enter your e-mail address" class="required email">


    <input type="submit" name="submit" class="button" id="submit" value="I'd like to join Now" />

</form>

<?php
// Get Data
$name = strip_tags($_POST['name']);
$email = strip_tags($_POST['email']);
$phone = strip_tags($_POST['phone']);
$url = strip_tags($_POST['url']);
$message = strip_tags($_POST['message']);

// Send Message
mail( "you@youremail.com", "Contact Form Submission",
"Name: $namenEmail: $emailnPhone: $phonenWebsite: $urlnMessage: $messagen",
"From: Forms <forms@example.net>" );
?>

<?php
 // Get Data
 $name = strip_tags($_POST['name']);
 $email = strip_tags($_POST['email']);
 $phone = strip_tags($_POST['phone']);
 $url = strip_tags($_POST['url']);
 $message = strip_tags($_POST['message']);

 $headers .="From: Forms <forms@example.net>";
 $headers .="CC: Mail1 <Mail1@example.net>";
 $headers .=", Mail2 <Mail2@example.net>";

 // Send Message
 mail( "you@youremail.com", "Contact Form Submission",
 "Name: $namenEmail: $emailnPhone: $phonenWebsite: $urlnMessage: $messagen",
  $headers );
 ?>

mail('email1@example.com, email2@example.com', $subject, $message, $headers);

mail("you@youremail.com,somebody@domain.com,anotherone@domain.com", ...