file.php

<?php
$par = isset($_POST['params'])?$_POST['params']:[];
print send_otrs($_POST['method'], $par);

function send_otrs($method, $data)
{

	$data['UserLogin'] = 'oktell';
	$data['Password'] = 'oktell';
	$ch = curl_init('http://192.168.5.101/otrs/nph-genericinterface.pl/Webservice/oktell/' . $method);

	$data_string = json_encode($data);
	curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
	curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_HTTPHEADER, array(
		'Content-Type: application/json',
		'Content-Length: ' . strlen($data_string))
	);

	$result = curl_exec($ch);
	return $result;
}