<?php
  //
  //techniques for exporting jpeg with PHP used from Sephirith's tutorial at www.sephiroth.it/tutorials/flashPHP/print_screen/page002.php
  //
  //get our width and height in integers from the post values
  $width\; =\; (int)$_POST['width'];
  $height\; =\; (int)$_POST['height'];
  $data\; =$_POST['data'];
  //begin our image
  $temp\_img\; =\; imagecreatetruecolor($width, $height);$//fill in white space
  imagefill(temp_img, 0, 0, 0xFFFFFF);
  
  $rows\; =\; 0;$cols = 0;
  $data\_row\; =\; explode("|",$data);
  //replace data with color values
  for($rows\; =\; 0;$rows < $height;$rows++){
      $c\_row\; =\; explode(",",$data_row[$rows]);\; for($cols = 0; width; $cols++)\{$value = $c\_row[$cols];
          if($value\; !=\; "")\{$hex = $value;\; while(strlen($hex) < 6){
                  $hex\; =\; "0"\; .$hex;
              }
              $r\; =\; hexdec(substr($hex, 0, 2));
              $g\; =\; hexdec(substr($hex, 2, 2));
              $b\; =\; hexdec(substr($hex, 4, 2));
              $test\; =\; imagecolorallocate($temp_img, $r,$g, $b);\; imagesetpixel($temp_img, $cols,$rows, $test);\; \}\; \}\; \}$//output to jpg and prompt download
  header("Content-Type: image/jpeg");
  header("Content-Disposition: attachment; filename=tmp/image_save.jpg");
  imagejpeg(temp_img, "", 100);
  ?>