Trying to create a sepia image...

No, I don't know who created that script but, what I do know is that you pass the image path e.g. :

$cm = new bw('/path/to/your/image.png');

ok, im lost,

so something like this?

PHP Code:

---

<?php
//Get the image
$image = $_GET['image'];

$cm = new bw($image);

// Get the dimensions
list($width, $height) = getimagesize($cm); 

// This class turns a color image into Sepia

class bw {
  
  var $_bw;
  var $_type;

  function printImage() {
    switch ($this->_type) {
        case IMAGETYPE_GIF : {
      header('Content-Type: image/gif');
      imagegif($this->_bw);
    } break;
    case IMAGETYPE_JPEG : {
      header('Content-Type: image/jpeg');
      imagejpeg($this->_bw);
    } break;
    case IMAGETYPE_PNG : {
      header('Content-Type: image/png');
      imagepng($this->_bw);
    } break;
    default : {
      header('Content-Type: image/jpeg');
      imagejpeg($this->_bw);
    } break;
    } // switch
    imagedestroy($this->_bw);
  }
  
  function bw($path) {
    // Let's find out what type is this image:
    if (@is_file($path)) {
      $this->_type = @exif_imagetype($path);
      switch ($this->_type) {
        case IMAGETYPE_GIF : {
      $img = @imagecreatefromgif($path);
    } break;
    case IMAGETYPE_JPEG : {
      $img = @imagecreatefromjpeg($path);
    } break;
    case IMAGETYPE_PNG : {
      $img = @imagecreatefrompng($path);
    } break;
    default : {
      $img =_errorImg();
    } break;
      } // switch ($this->_type)
      
      // If image was created successfully, do some magic stuff
      if ($img) {
    $this->_bw = $this->_toBW($img);
    imagedestroy($img);
      } // if ($this->_img)
    } // if (@is_file...)
    else {
      $this->_bw = $this->_errorImg();
    }
  }
  function _errorImg() {
    return imagecreate($width, $height);
  }
  
  function _toBW($src){
    $x = imagesx($src);
    $y = imagesy($src);

    $dest = imagecreatetruecolor($x, $y);

    for ($i=0;$i<$x;$i++) {
      for ($j=0;$j<$y;$j++) {
        $oldcolor = imagecolorsforindex($src, imagecolorat($src, $i, $j));
    $newcolor = (int)(($oldcolor['red'] + $oldcolor['green'] + $oldcolor['blue']) / 3);
    $sepia = array(
            "red" => 145,
            "green" => 65,
            "blue" => 10
             );
    $mix = array(
                "o" => 0.7,
            "d" => 0.3
             );
        $newr = ($newcolor*$mix['o'] + $sepia['red']*$mix['d'])>255?255:($newcolor*$mix['o'] + $sepia['red']*$mix['d']);
        $newg = ($newcolor*$mix['o'] + $sepia['green']*$mix['d'])>255?255:($newcolor*$mix['o'] + $sepia['green']*$mix['d']);
        $newb = ($newcolor*$mix['o'] + $sepia['blue']*$mix['d'])>255?255:($newcolor*$mix['o'] + $sepia['blue']*$mix['d']);
    imagesetpixel($dest, $i, $j, imagecolorallocate($dest, $newr, $newg, $newb ));
      } // for($j
    } // for ($i
    
    return $dest;
  }
}

import_request_variables('g','bw_');

$bw = new bw($bw_im);
$bw->printImage();

?>

---

Take a look at the filter I mentioned, IMG_FILTER_COLORIZE. That would probably be easier.

True, why don't you try using image filters since they are easier than hard coding everything? However if it doesn't work out for you, you can always go back to that code and if anything goes wrong, we'll be here for you. :p