Use Steam API with PHP easily

<?php
include "api.php";
$useapi = new ISteamUser;
$variable = $useapi -> GetPlayerSummaries("your_api_key","steam_id","avatarfull");
echo $variable;
//This code gives user's full avatar.
?>

• Log in to your Steam Account on Browser
• Go to this link
• If there's no api key, create one

Or you can find your api key with Steam Client too.

⚠️ Don't share your api key ⚠️