mail.php

<?php
if(isset($_POST['email'])) {
 
    // EDIT THE 2 LINES BELOW AS REQUIRED
    $email_to = "sae.nitdgp1@gmail.com";
    $email_subject = "Suggestions From SAE-Website";
 
    function died($error) {
         header("Location:index.php");
        // echo $error."<br /><br />";
        // echo "Please go back and fix these errors.<br /><br />";
        die();
    }
 
 
    // validation expected data exists
    if(!isset($_POST['name']) ||
        !isset($_POST['email']) ||
        !isset($_POST['college']) ||
        !isset($_POST['message'])) {
        died('We are sorry, but there appears to be a problem with the form you submitted.');       
    }
 
     
 
    $name = $_POST['name']; // required
    $email_from = $_POST['email']; // required
    $college = $_POST['college']; // not required
    $message = $_POST['message']; // required
 
    $error_message = "";
    $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';
 
  if(!preg_match($email_exp,$email_from)) {
    $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
  }
 
  if(strlen($error_message) > 0) {
    died($error_message);
  }
 
    $email_message = "Form details below.\n\n";
 
     
    function clean_string($string) {
      $bad = array("content-type","bcc:","to:","cc:","href");
      return str_replace($bad,"",$string);
    }
 
     
 
    $email_message .= "Name: ".clean_string($name)."\n";
    $email_message .= "Email: ".clean_string($email_from)."\n";
    $email_message .= "College: ".clean_string($college)."\n";
    $email_message .= "Message: ".clean_string($message)."\n";
 
// create email headers
$headers = 'From: '.$email_from."\r\n".
'Reply-To: '.$email_from."\r\n" .
'X-Mailer: PHP/' . phpversion();
mail($email_to, $email_subject, $email_message, $headers) or die("Failure");
header("Location:redirect.php#contact");
?>
<?php
}
?>