Jak na zdejší modicons.php

$src = imagecreatefromgif('ad.gif');
$src2 = imagecreatefromgif('af.gif');
$src3 = imagecreatefromgif('ae.gif');
$dest = imagecreatetruecolor(3 * 16 + 300, 11);

$red = imagecolorallocate($dest, 255, 255, 255);
imagefill($dest, 0, 0, $red);

// Copy
imagecopy($dest, $src, 0, 0, 0, 0, 16, 11);
imagecopy($dest, $src2, 26, 0, 0, 0, 16, 11);
imagecopy($dest, $src3, 52, 0, 0, 0, 16, 11);

// Output and free from memory
header('Content-Type: image/jpg');
imagejpeg($dest);

    
    // Return the requested graphic file to the browser
// or a 304 code to use the cached browser copy
function displayGraphicFile ($graphicFileName, $fileType='jpeg') {
  $fileModTime = filemtime($graphicFileName);
  // Getting headers sent by the client.
  $headers = getRequestHeaders();
  // Checking if the client is validating his cache and if it is current.
  if (isset($headers['If-Modified-Since']) && (strtotime($headers['If-Modified-Since']) == $fileModTime)) {

    // Client's cache IS current, so we just respond '304 Not Modified'.
    header('Last-Modified: '.gmdate('D, d M Y H:i:s', $fileModTime).' GMT', true, 304);
  } else {
    
    // Image not cached or cache outdated, we respond '200 OK' and output the image.
    header('Last-Modified: '.gmdate('D, d M Y H:i:s', $fileModTime).' GMT', true, 200);
    header('Content-type: image/'.$fileType);
    header('Content-transfer-encoding: binary');
    header('Content-length: '.filesize($graphicFileName));
    readfile($graphicFileName);
  }
}


// return the browser request header
// use built in apache ftn when PHP built as module,
// or query $_SERVER when cgi
function getRequestHeaders() {
  if (function_exists("apache_request_headers")) {
    if($headers = apache_request_headers()) {
      return $headers;

    }
  }
  $headers = array();
  // Grab the IF_MODIFIED_SINCE header
  if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
    $headers['If-Modified-Since'] = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
  }
  return $headers;
}