original_string: protected function prescan_keys() {
          $files = glob($this->glob_keys_pattern(), GLOB_MARK | GLOB_NOSORT);
          if (is_array($files)) {
              foreach ($files as $filename) {
                  $this->keys[basename($filename)] = filemtime($filename);
              }
          }
      }
code: protected function prescan_keys() {
          $files = glob($this->glob_keys_pattern(), GLOB_MARK | GLOB_NOSORT);
          if (is_array($files)) {
              foreach ($files as $filename) {
                  $this->keys[basename($filename)] = filemtime($filename);
              }
          }
      }
code_tokens: protected function prescan_keys ( ) { $ files = glob ( $ this -> glob_keys_pattern ( ) , GLOB_MARK | GLOB_NOSORT ) ; if ( is_array ( $ files ) ) { foreach ( $ files as $ filename ) { $ this -> keys [ basename ( $ filename ) ] = filemtime ( $ filename ) ; } } }
docstring: Pre-scan the cache to see which keys are present.
docstring_tokens: Pre - scan the cache to see which keys are present .