Multi-Line Text-To-Image Function v2

<?PHP
/**
 * PROJECT CLEVERWEB GENERAL LESSER LICENSE INFORMATION v2
 * ------------------------------------------------------------
 * Copyright (C) 2012 Nicholas Jordon
 * http://projcleverweb.com
 *
 * Licenses:
 *   GNU LESSER GENERAL PUBLIC LICENSE VERSION 3
 *   APACHE LICENSE, VERSION 2.0
 *
 * This software is free software: you can redistribute it
 * and/or modify it under both the terms of the GNU Lesser
 * General Public License as published by the Free Software
 * Foundation, version 3 of the License, and the Apache
 * License, version 2.0 of the License; you may not use this
 * software except in compliance with both licenses.
 *
 * You may obtain a copy of the licenses at:
 * @Apache v2.0: http://www.apache.org/licenses/LICENSE-2.0
 * @GNU LGPL v3: http://www.gnu.org/licenses/lgpl-3.0.html
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the licenses is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the licenses for the
 * specific language governing permissions and other details.
 *
 * Verfication Key: e450edcbe7703e40d9edcf19a18fb4bc
 */

/**
 * Multi-Line Text-To-Image Function v2
 * ---------------------------------------
 * Summery: Takes a text string and
 *   converts it to an image.
 * Notice: Converts \r to \n regardless
 *   if it is actual EOL delimiter.
 *
 * @Param: (string) $string
 *   The string to be converted.
 * @Param: (int) $font_size
 *   Size of the output text.
 * @Param: (int) $font_color
 *   Hexdecimal color of the font.
 * @Param: (int) $bg_color
 *   Hexdecimal color of the background.
 */

function txtimg($string,$font_size=5,$font_color='0',$bg_color='f'){
  if(strpos($string,"\r")){ // unix/windows compatible
    $string = str_replace("\r","\n",$string);
  }
  $lines=explode("\n",$string);
  foreach($lines as $key=>$line){
    $linecount++;
    if(strlen($line)>strlen($longest)){
      $longest = $line;
    }
    // now lets make it easier to work with
    $linearray[$key]=array('txt'=>$line,'len'=>strlen($line));
  }
  $width = imagefontwidth($font_size)*strlen($longest);
  $lheight = imagefontheight($font_size)+2; // 2px between each line
  $height = $lheight*$linecount;
  $img = imagecreate($width,$height);
  function hextorgb($hex){
    $hex=str_replace('#','',$hex);
    $length = strlen($hex);
    if(!$length){return false;} // if null return false
    switch($length){ // full
      case 6:
        $r=$hex[0].$hex[1];$g=$hex[2].$hex[3];$b=$hex[4].$hex[5];
        break;
      case 3: // 1/2
        $r=$hex[0].$hex[0];$g=$hex[1].$hex[1];$b=$hex[2].$hex[2];
        break;
      case 2: // partial
        $r=$hex[0].$hex[1];$g=$hex[0].$hex[1];$b=$hex[0].$hex[1];
        break;
      case 1: // single
        $r=$hex.$hex;$g=$hex.$hex;$b=$hex.$hex;
        break;
    default:
      return false; // if incorrect # of char return false
    }
    return array('r'=>hexdec($r),'g'=>hexdec($g),'b'=>hexdec($b));
  }
  $font_color = hextorgb($font_color);
  $bg_color = hextorgb($bg_color);
  $bg = imagecolorallocate($img,$bg_color['r'],$bg_color['g'],$bg_color['b']);
  $color = imagecolorallocate($img,$font_color['r'],$font_color['g'],$font_color['b']);
  foreach($linearray as $key=>$value){
    $len = $value['len'];
    $string = $value['txt'];
    $ypos = 0;
    if($key){
      $ypos = $key*$lheight;
    }
    imagestring($img,$font_size, 0,$ypos,$string, $color);
  }
  header("Content-Type: image/png"); // loads faster
  imagepng($img);
  imagedestroy($img);
}

// example
foreach($_SERVER as $key => $value){
  $str .= $key." = ".$value.PHP_EOL;
}
txtimg($str,4,'#ff0000');

?>