code: public function set(string $sName, $mValue, int $iFlag = 0, int $iExpire = false)
      {
          if ($iExpire === false) {
  
              return parent::set($sName, $mValue);
          }
          else {
  
              return parent::setex($sName, $iExpire, $mValue);
          }
      }
docs: set a value
  
  @access public
  @param  string $sName name of the session
  @param  mixed $mValue value of this sesion var
  @param  int $iFlag unused
  @param  int $iExpire expiration of cache
  @return \Venus\lib\Cache\Apc