Shopify Webhook to read customer registration

gistfile1.txt

<?php

$webhookContent = "";

$webhook = fopen('php://input' , 'rb');
while (!feof($webhook)) {
    $webhookContent .= fread($webhook, 4096);
}
fclose($webhook);

error_log($webhookContent);

$user = json_decode($webhookContent, true);


if($user[note] != ''){
$to = "[email protected]";
$subject = "New wholesaler signed up on society-plus.com";
$txt = "Hi, A new user ( Name : ". $user[first_name] . " " . $user[last_name] . " , Email : " . $user[email] . ") Just registered to the store and want to be a wholesaler. Below is his/her details ( ". $user[note] ." )";
$headers = "From: [email protected]" . "\r\n" .
"CC: [email protected]";

mail($to,$subject,$txt,$headers);
}
?>