Ever wanted to search and replace inside a zip container with PHP?

# this will replace every 'a' by 'A' inside every html file inside file.zip
replaceinzip("file.zip", '/a/', 'A', "/.+?html/");
exit();

function replaceinzip($zipfile, $search, $replace, $filefilter) {
   
   # extract to random temp folder
   $tempfolder=md5(mt_rand());
   $zip = new ZipArchive;
   if ($zip->open($zipfile) === TRUE) {
      $zip->extractTo('./'.$tempfolder.'/');
      $zip->close();
   } else {
      trigger_error(htmlentities("not a zip error"), E_USER_ERROR);
   }


   # replace in files
   $files=rsearch($tempfolder, $filefilter);
   foreach ($files as $file) {
      $file_content = file_get_contents($file);
      $file_content = preg_replace($search, $replace, $file_content);
      file_put_contents($file,$file_content);   
   }

   # create new temp zip
   $zip = new ZipArchive();
   if($zip->open($zipfile.'_temp', ZIPARCHIVE::OVERWRITE) !== true) {
         return false;
   }
   
   # add files to new temp zip without foldername
   $files=rsearch($tempfolder, "/.*/");
   # add mimetype first to overcome epub checking errors
   $zip->addFile($tempfolder.'/mimetype', "mimetype");   
   foreach($files as $file) {
      $zip_filename = substr($file, strpos($file,'/') + 1);
      if (file_exists($file) && is_file($file) && $zip_filename!="mimetype") $zip->addFile($file, $zip_filename);
   }
   
   $zip->close();
   
   # rename new zip to old zip
   rename($zipfile.'_temp', $zipfile);
   
   # remove temp folder and files
   delete($tempfolder);
   
   return true;
   
}

# http://stackoverflow.com/questions/17160696/php-glob-scan-in-subfolders-for-a-file#17161106
function rsearch($folder, $pattern) {
    $dir = new RecursiveDirectoryIterator($folder);
    $ite = new RecursiveIteratorIterator($dir);
    $files = new RegexIterator($ite, $pattern, RegexIterator::GET_MATCH);
    $fileList = array();
    foreach($files as $file) {
        $fileList = array_merge($fileList, $file);
    }
    return $fileList;
}

#http://stackoverflow.com/questions/1334398/how-to-delete-a-folder-with-contents-using-php/1334425#1334425
function delete($path) {
    if (is_dir($path) === true) {
        $files = array_diff(scandir($path), array('.', '..'));
        foreach ($files as $file) {
            delete(realpath($path) . '/' . $file);
        }
        return rmdir($path);
    } else if (is_file($path) === true) {
        return unlink($path);
    }
    return false;
}