if ($sandbox != 0) {
	$serviceURL = 'https://sandbox.itunes.apple.com/verifyReceipt';
} else {
	$serviceURL = 'https://buy.itunes.apple.com/verifyReceipt';
}

$ch = curl_init ( $serviceURL );
curl_setopt ( $ch, CURLOPT_CUSTOMREQUEST, "POST" );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data );
curl_setopt ( $ch, CURLOPT_SSL_VERIFYPEER, false );
curl_setopt ( $ch, CURLOPT_SSL_VERIFYHOST, false );
curl_setopt ( $ch, CURLOPT_HTTPHEADER, array (
		'Content-Type:application/json',
		'Content-Length: ' . strlen ( $data ) 
) );
$result = curl_exec ( $ch );
$errorNo = curl_errno ( $ch );
curl_close ( $ch );