original_string: public function clear()
      {
          echo $path  = $this->getFilePath();
          $files = glob($path . '*' . $this->fileExtension);
  
          foreach ($files as $file)
          {
              // if cache file expire, delete cache file
              if ( time() > filemtime($file) )
              {
                  @unlink($file);
              }
          }
      }
code: public function clear()
      {
          echo $path  = $this->getFilePath();
          $files = glob($path . '*' . $this->fileExtension);
  
          foreach ($files as $file)
          {
              // if cache file expire, delete cache file
              if ( time() > filemtime($file) )
              {
                  @unlink($file);
              }
          }
      }
code_tokens: public function clear ( ) { echo $ path = $ this -> getFilePath ( ) ; $ files = glob ( $ path . '*' . $ this -> fileExtension ) ; foreach ( $ files as $ file ) { // if cache file expire, delete cache file
   if ( time ( ) > filemtime ( $ file ) ) { @ unlink ( $ file ) ; } } }
docstring: Clear expire cache file
  
  @return void
docstring_tokens: Clear expire cache file