Multi-Line Text-To-Image

<?PHP
/**
 * PROJECT CLEVERWEB GENERAL LESSER LICENSE INFORMATION v3.1
 * ------------------------------------------------------------
 * Copyright (C) 2011-2012 Nicholas Jordon
 * All rights reserved
 * Package: Project CleverWeb
 * http://ProjectCleverWeb.com
 *
 * License:
 *   GNU LESSER GENERAL PUBLIC LICENSE VERSION 3
 *
 * This software is free software: you can redistribute it
 * and/or modify it under the terms of the GNU Lesser
 * General Public License as published by the Free Software
 * Foundation, version 3 of the License, You may not use this
 * software except in compliance with the license.
 *
 * You may obtain a copy of the license at:
 *   http://www.gnu.org/licenses/lgpl-3.0.html
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the license is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.
 *
 * Verfication Key: e450edcbe7703e40d9edcf19a18fb4bc
 */

/**
 * Multi-Line Text-To-Image Function
 * ---------------------------------------
 * Takes a text string and converts it to
 *   an image.
 * @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
  $height = bcmul($lheight,$linecount);
  $img = imagecreate($width,$height);
  function hextorgb($hex){
    $hex=str_replace('#','',$hex);
    preg_match("/^#{0,1}([0-9a-f]{1,6})$/i",$hex,$match);
    if(!isset($match[1])){return false;}
    if(strlen($match[1])==6){
      list($r, $g, $b) = array($hex[0].$hex[1],$hex[2].$hex[3],$hex[4].$hex[5]);
    }
    elseif(strlen($match[1])==3){
      list($r, $g, $b) = array($hex[0].$hex[0],$hex[1].$hex[1],$hex[2].$hex[2]);
    }
    else if(strlen($match[1])==2){
      list($r, $g, $b) = array($hex[0].$hex[1],$hex[0].$hex[1],$hex[0].$hex[1]);
    }
    else if(strlen($match[1])==1){
      list($r, $g, $b) = array($hex.$hex,$hex.$hex,$hex.$hex);
    }
    else {
      return false;
    }
    $color = array();
    $color['r'] = hexdec($r);
    $color['g'] = hexdec($g);
    $color['b'] = hexdec($b);
    return $color;
  }
  $font_color = hextorgb($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){
      $ypos = bcmul($key,$lheight);
    }
    imagestring($img,$font_size, 0,$ypos,$string, $color);
  }
  header("Content-Type: image/png"); // loads faster
  imagepng($img);
  imagedestroy($img);
}

// example
txtimg(
"This is your IP: ".$_SERVER['REMOTE_ADDR'].PHP_EOL.
"This is your User-Agent: ".$_SERVER['HTTP_USER_AGENT'],
4,'#ff0000','#444444');

?>