Eso es un ejemplo de como mandar un request sin JSON concatenado los varoles en la URL mediante GET.

getOrder_Shopify.php

<? php
function orderStatus($data_0, $data_1, $data_2, $data_3, $data_4, $data_5, $data_6, $data_7, $data_8, $data_9) {
	$payload = 'x_account_id=' . $data_1 . '&x_reference=' . $data_2 . '&x_currency=' . $data_3 . '&x_test=' . $data_4 . '&x_amount=' . $data_5 . '&x_gateway_reference=' . $data_6 . '&x_timestamp=' . $data_7 . '&x_result=' . $data_8 . '&x_signature=' . $data_9;
		
	$session = curl_init();
	curl_setopt($session, CURLOPT_URL, $data_0); // $putUrl
	curl_setopt($session, CURLOPT_CONNECTTIMEOUT, 30); 
	curl_setopt($session, CURLOPT_TIMEOUT, 30); 
	curl_setopt($session, CURLOPT_HEADER, true); 
	curl_setopt($session, CURLOPT_RETURNTRANSFER,true); 
	curl_setopt($session, CURLOPT_CUSTOMREQUEST, 'GET');
	curl_setopt($session, CURLOPT_HTTPHEADER, array('X-HTTP-Method-Override: GET'));
	curl_setopt($session, CURLOPT_POSTFIELDS, $payload);

	$shopify_response = curl_exec($session);
	curl_close($session);
	//echo $shopify_response;

}
?>