Signature generation

<?php
    include("hub.php");
    if(!$_GET["key"]) echo "<form action=? method=GET>Enter a key: <input type=text name=key></form>";
    else {
        $key = strtolower(trim($_GET["key"]));
        $back_color = "255,255,255"; // white
        $text_color_passed = "0,0,0";

        if($_GET["back"]) $back_color = $_GET["back"];
        if($_GET["text"]) $text_color_passed = $_GET["text"];

        $back_array = explode(",",$back_color);
        $back_red = $back_array[0];
        $back_green = $back_array[1];
        $back_blue = $back_array[2];

        $text_array = explode(",",$text_color_passed);
        $text_red = $text_array[0];
        $text_green = $text_array[1];
        $text_blue = $text_array[2];

        $member_data = ParseMember($key);
        $stars = 0;

        $display_key = $member_data["general"]["key"];
        $joined = date("n/d/Y",strtotime($member_data["general"]["joined"]));
        $joined_year = date("Y",strtotime($member_data["general"]["joined"]));
        $friends = count($member_data["website"]["friends"]);
        $fans = count($member_data["website"]["fans"]);
        $member = $member_data["general"]["is_member"];
        if($member == "1") {$stars++; $member = "BYOND Member";}
        else $member = "";
        $gender = $member_data["general"]["gender"];
        $avatar = imagecreatefrompng("images/default_ava.png");
        $avatar_width = 64;
        $avatar_height = 64;
        if($member_data["general"]["icon"]) {
            $image_name = $member_data["general"]["icon"];
            if(endswith(strtolower($image_name),".png")) $avatar = @imagecreatefrompng($image_name);
            else if(endswith(strtolower($image_name),".jpg")||endswith($image_name,".jpeg")) $avatar = @imagecreatefromjpeg($image_name);
            else if(endswith(strtolower($image_name),".gif")) $avatar = @imagecreatefromgif($image_name);
            else if(endswith(strtolower($image_name),".bmp")) $avatar = @imagecreatefrombmp($image_name);
            list($avatar_width,$avatar_height) = getimagesize($image_name);
        }

        if($fans >= 1 && $fans <= 30) $stars += 0.5;
        else if($fans >= 31 && $fans <= 50) $stars += 1;
        else if($fans >= 51 && $fans <= 100) $stars += 1.5;
        else if($fans >= 101) $stars += 2;

        if($friends >= 1 && $friends <= 50) $stars += 0.5;
        if($friends >= 51 && $friends <= 120) $stars += 1;
        if($friends >= 121 && $friends <= 250) $stars += 1.5;
        else if($friends >= 251) $stars += 2;

        if($join_year <= 2001) $stars += 2;
        else if($join_year <= 2005) $stars += 1.5;
        else if($join_year <= 2009) $stars += 1;
        else if($join_year >= 2010) $stars += 0.5;
        if($stars >= 7) $stars = 7;

        $main_image = imagecreatetruecolor(310,70);
        $line_image = imagecreatefrompng("images/background.png");
        $logo_image = imagecreatefrompng("images/logo.png");
        $small_logo_image = imagecreatefrompng("images/small_logo.png");
        $text_image = imagecreatefrompng("images/background.png");

        $gender_image = imagecreatefrompng("images/$gender.png");


        $background_color = imagecolorallocate($main_image,$back_red,$back_green,$back_blue);
        $border_color = imagecolorallocate($main_image,0,0,0);
        $line_color = imagecolorallocatealpha($line_image,$back_red,$back_green,$back_blue,100);
        $text_color = imagecolorallocate($text_image,$text_red,$text_green,$text_blue);

        imagefilledrectangle($main_image,0,0,310,68,$background_color);

        for($y = 2;$y <= 68; $y += 2) {
            imageline($line_image,0,$y,310,$y,$line_color);
        }
        imagefilter($line_image,IMG_FILTER_NEGATE);

        imagecopy($main_image,$small_logo_image,65,5,0,0,200,62);
        imagecopy($main_image,$logo_image,270,0,0,0,310,75);
        imagecopy($main_image,$line_image,0,0,0,0,310,70);
        imagecopyresampled($main_image,$avatar,3,3,0,0,64,64,$avatar_width,$avatar_height);
        imagerectangle($main_image,0,0,309,69,$border_color);

        imagecopy($main_image,$gender_image,75,3,0,0,16,22);
        imagestring($text_image,12,95,5,"$display_key",$text_color);
        $star_x = 74;
        while($stars > 0) {
            $star_path = "images/star.png";
            if($stars == 0.5) $star_path = "images/hstar.png";
            $star_image = imagecreatefrompng($star_path);
            $star_white = imagecolorat($star_image,6,6);
            imagecolorset($star_image,$star_white,$text_red,$text_green,$text_blue);
            imagecopy($main_image,$star_image,$star_x,22,0,0,18,18);
            $star_x += 18;
            $stars--;
        }

        imagestring($text_image,3,80,40,"$member",$text_color);
        imagestring($text_image,3,80,52,"$joined",$text_color);
        imagestring($text_image,3,185,40,"Fans: $fans",$text_color);
        imagestring($text_image,3,185,52,"Friends: $friends",$text_color);

        imagecopy($main_image,$text_image,0,0,0,0,310,70);
        header("Content-type: image/png");
        imagepng($main_image);

    }
?>