head.php

<?php
    /*
    *   Usage: head.php?nick=Notch&size=48
    *   Dimensions will be size px width and size px height
    */

    if(!isset($_GET['nick'])) {
        $_GET['nick'] = 'char';
    }
    if(!isset($_GET['size'])) {
        $_GET['size'] = 8;
    }

    $cache_file = 'cache_head/'.$_GET['nick'].'_'.$_GET['size'].'.png';
    $cache_life = '86400';
    $filemtime = @filemtime($cache_file);

    if (!$filemtime or (time() - $filemtime >= $cache_life)) {

        $width = $_GET['size'];
        $height = $_GET['size'];

        $img=imagecreatetruecolor($width,$height);
        imagealphablending($img, false);
        $transparent = imagecolorallocatealpha($img, 0, 0, 0, 127);
        imagefill($img, 0, 0, $transparent);
        imagesavealpha($img,true);
        imagealphablending($img, true);

        $im = @imagecreatefrompng('http://s3.amazonaws.com/MinecraftSkins/'.$_GET['nick'].'.png');

        if(!$im) {
            $im = @imagecreatefrompng('http://s3.amazonaws.com/MinecraftSkins/char.png');
        }

        imagealphablending($im, true);
        imagecopyresampled($img, $im, 0, 0, 0, 0, $width, $height, 8, 8);

        header("Content-type: image/png");

        imagepng($img);
        imagepng($img, $cache_file);
        imagedestroy($img);
        imagedestroy($im);
    } else {
        readfile($cache_file);
    }

?>