Get avatar of Yahoo! Messenger user

<?php
    $nick = $_GET["nick"];
    if ($nick == "") $nick = "codjng";
    $fp = @fsockopen("img.msg.yahoo.com", 80, $errno, $errstr, 5);
    if (!$fp) {
    header("Content-Type: image/gif");
    readfile("avatar.gif");
    } else {
     $out = "GET /avatar.php?yids=$nick HTTP/1.1\r\n";
     $out .= "Host: img.msg.yahoo.com\r\n";
     $out .= "Connection: Close\r\n\r\n";

     fwrite($fp, $out);
     $src = "";
     while (!feof($fp)) {
     $src .= fgets($fp, 256);
     }
    
     if (strpos($src, "‰PNG") === false) {
         header("Content-Type: image/gif");
        readfile("avatar.gif");
     } else {
            $src = substr($src, strpos($src, "‰PNG"));
            fclose($fp);
            if (strlen($src) != 710)
             @file_put_contents("avatar/$nick.png", $src);
         header("Content-Type: image/png");
         echo $src;
     }
    }
    
    if (!function_exists("file_put_contents")) {
        function file_put_contents($filename, $contents) {
            $fh = fopen($filename, 'w');
            fwrite($fh, $contents);
            fclose($fh);
        }
    }
?>