DropBox WebHook PHP Sample

dropbox-webhook.php

<?php
define ('SECRET', 'Your_secret_here');

if (isset($_GET['challenge'])) {
	echo $_GET['challenge'];
} else {
	$raw_data = file_get_contents('php://input');
	if ($raw_data) {
		$json = json_decode($raw_data);
		if (is_object($json)) {
			if (isset($json->list_folder)) {
				$headers = getallheaders();
				if (hash_hmac("sha256",$raw_data,SECRET) == $headers['X-Dropbox-Signature']) {
					// Do something
					 
					 
					exit();
				}
			}
		}
	}
	header('HTTP/1.0 403 Forbidden');
}


if (!function_exists('getallheaders')) { 
  function getallheaders()  { 
    $headers = ''; 
    foreach ($_SERVER as $name => $value)  { 
      if (substr($name, 0, 5) == 'HTTP_') { 
        $headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value; 
      } 
    } 
    return $headers; 
  }
}