<?php

$api_key = '.......';							//Steam API Key, Required to work
$lines = file('parse.txt');  						//reads in the file with the list of user numbers
$game_id = 550;										//Steam Game ID, 440 is TF2
foreach ($lines as $usernumber) { 					 //loops line by line
$link = 'http://api.steampowered.com/IPlayerService/GetOwnedGames/v0001/?key=' . $api_key . '&steamid=' . $usernumber . '&format=json';
$json = file_get_contents($link);					//Reads link (this ^)
$data = json_decode($json);
foreach ($data->response->games as $game) {
    if ($game->appid == $game_id) {
        echo 'Playtime for ', $usernumber, ' is ' . $game->playtime_forever."<br>";
   		}
	}
}
?>