public function isCached($key) {
    if (false != $this->_loadCache()) {
      $cachedData = $this->_loadCache();
      return isset($cachedData[$key]['data']);
    }
  }
public function isCached($key) {
    if (false != $this->_loadCache()) {
      $cachedData = $this->_loadCache();
      return isset($cachedData[$key]['data']);
    }
  }
public function isCached ( $ key ) { if ( false != $ this -> _loadCache ( ) ) { $ cachedData = $ this -> _loadCache ( ) ; return isset ( $ cachedData [ $ key ] [ 'data' ] ) ; } }
Check whether data accociated with a key

@param string $key
@return boolean
Check whether data accociated with a key