<?php
$data = $_GET;
$mac_provided = $data['mac'];  /* Get the MAC from the POST data*/
unset($data['mac']);  /* Remove the MAC key from the data. */
$ver = explode('.', phpversion());
$major = (int) $ver[0];
$minor = (int) $ver[1];
if($major >= 5 and $minor >= 4){
     ksort($data, SORT_STRING | SORT_FLAG_CASE);
}
else{
     uksort($data, 'strcasecmp');
}
/* You can get the 'salt' from Instamojo's developers page(make sure to log in first): https://www.instamojo.com/developers*/
/* Pass the 'salt' without the <>.*/
$mac_calculated = hash_hmac("sha1", implode("|", $data), "858b8dfc5d6a4fa9a677fcd6402fc2bb");

if($mac_provided == $mac_calculated){
   
    if($data['status'] == "Credit"){
       /* Payment was successful, mark it as completed in your database  */
                
                $to = 'vithlacs@gmail.com';
                $subject = 'Website Payment Request ' .$data['buyer_name'].'';
                $message = "<h1>Payment Details</h1>";
                $message .= "<hr>";
                $message .= '<p><b>ID:</b> '.$data['payment_id'].'</p>';
                $message .= '<p><b>Amount:</b> '.$data['amount'].'</p>';
                $message .= "<hr>";
                $message .= '<p><b>Name:</b> '.$data['buyer_name'].'</p>';
                $message .= '<p><b>Email:</b> '.$data['email'].'</p>';
                $message .= '<p><b>Phone:</b> '.$data['phone'].'</p>';
                $message .= "<hr>";
				$headers .= "MIME-Version: 1.0\r\n";
                $headers .= "Content-Type: text/html; charset=ISO-8859-1\r\n";
                /* send email*/
                mail($to, $subject, $message, $headers);
		}
    else{
       /* Payment was unsuccessful, mark it as failed in your database*/
    }
}
else{
    echo "Invalid MAC passed";
}
?>