I am using the shopify PHP client of "cmcdonaldca" - https://github.com/cmcdonaldca/ohShopify.php
On creating a webhook it gives the lexical error in response.here is the code.
$sc = new ShopifyClient($_SESSION['shop'], $_SESSION['token'], $api_key, $secret);
$b = '{"webhook":{"topic":"orders/create","address":"http://www.abc.com","format": "json"}}';
try
{
$webhooks = $sc->call('POST','/admin/webhooks.json',$b);
}
catch (ShopifyApiException $e)
{
var_dump($e->getResponse());
}