PHP traverses the directory, generates the md5 value of each file in the directory and writes it to the result file

 array("';
    $content .= $fileSize;
    $content .= '","';
    $content .= $fileMd5;
    $content .= '"),';
    $content .= "\n";
      
    if (! fwrite ( $fileHandle, $content )) {
      print ($filePath . " can not be written!") ;
    }
  }
    
  /**
   * 在manifes文件中写入头信息
   *
   * @param unknown $fileHandle     
   */
  public static function writeMaifestHeader($fileHandle) {
    $header = "