$postfields = array(
				"userid"=>$userid,
				"hash"=>$hash,
				"action"=>"applycredit",
				"invoiceid"=>"123"

				);
$result = connect_client_api_o2proxycom($postfields);

function connect_client_api_o2proxycom($postfields){
	 $url = "https://my.virty.io/includes/client_api/index.php"; # URL to o2proxy.com API
	 $ch = curl_init();
	 curl_setopt($ch, CURLOPT_URL, $url);
	 curl_setopt($ch, CURLOPT_POST, 1);
	 curl_setopt($ch, CURLOPT_TIMEOUT, 1000);
     curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
     curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
	 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	 curl_setopt($ch, CURLOPT_POSTFIELDS, $postfields);
	 $data = curl_exec($ch);
	 curl_close($ch);
	 return $data;
}