<?php
$curl_handle=curl_init();
curl_setopt($curl_handle, CURLOPT_URL,'http://steamcommunity.com/profiles/76561198337627631/inventory/json/730/2/');
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_USERAGENT, 'MOZILLA YOOO');
$page = curl_exec($curl_handle);
curl_close($curl_handle);
$f_handler = fopen('test.txt', 'w');
fwrite($f_handler, $page);