original_string: protected function _id($id)
      {
          if (($id !== null) && isset($this->_options['cache_id_prefix'])) {
              return $this->_options['cache_id_prefix'] . $id; // return with prefix
          }
          return $id; // no prefix, just return the $id passed
      }
code: protected function _id($id)
      {
          if (($id !== null) && isset($this->_options['cache_id_prefix'])) {
              return $this->_options['cache_id_prefix'] . $id; // return with prefix
          }
          return $id; // no prefix, just return the $id passed
      }
code_tokens: protected function _id ( $ id ) { if ( ( $ id !== null ) && isset ( $ this -> _options [ 'cache_id_prefix' ] ) ) { return $ this -> _options [ 'cache_id_prefix' ] . $ id ; // return with prefix } return $ id ; // no prefix, just return the $id passed }
docstring: Make and return a cache id
  
  Checks 'cache_id_prefix' and returns new id with prefix or simply the id if null
  
  @param  string $id Cache id
  @return string Cache id (with or without prefix)
docstring_tokens: Make and return a cache id