Script to convert small images into inline base64 in CSS

cssb64ifier.php

<?
$inputFile = "";
$outputFile = "";
$sizeLimit = 10 * 1024;
for ($x = 1; $x<count($argv); $x++) {
  switch ($argv[$x]) {
    case "--output":
    case "-o":
      {
        $outputFile = $argv[++$x];
      } break;
    case "--limit":
    case "-l":
      {
        $sizeLimit = (int)$argv[++$x];
      } break;
    default:
      {
        $inputFile = $argv[$x];
      } break;
  }
}
if (!file_exists($inputFile))
{
  die(print_r($argv));
}
if (!$outputFile)
  $outputFile = str_replace(".css",".b64.css",$inputFile);
  
$data = file_get_contents($argv[1]);

$data = preg_replace_callback("/url\((.*?)\)/",function($m){
  global $sizeLimit;
  $file = trim($m[1],"\"'");
  echo $file." ... ";
  if (!file_exists($file))
  {
    echo "file not found\n";
    return $m[0];
  }
  if (filesize($file) > $sizeLimit)
  {
    echo "file is ".(int)(filesize($file)/1024)."k, skipping\n";
    return $m[0];
  }
  list($width, $height, $type, $attr) = getimagesize($file);
  $sep = "\\\n    ";
  $data = "url('data:".image_type_to_mime_type($type).";base64,".$sep;
  $fileRaw = file_get_contents($file);
  $data .= trim(chunk_split(base64_encode($fileRaw),76,$sep),"\n \\");
  $data .= "')";
  echo "done\n";
  return $data;
},$data);

file_put_contents($outputFile,$data);
?>