public function getVariable($name, $default = NULL) {
    return isset($this->conf[$name]) ? $this->conf[$name] : $default;
  }
public function getVariable($name, $default = NULL) {
    return isset($this->conf[$name]) ? $this->conf[$name] : $default;
  }
public function getVariable ( $ name , $ default = NULL ) { return isset ( $ this -> conf [ $ name ] ) ? $ this -> conf [ $ name ] : $ default ; }
Returns a persistent variable.

To avoid problems, always use lower case for persistent variable names.

@param $name
The name of the variable to return.
@param $default
The default value to use if this variable has never been set.

@return
The value of the variable.
Returns a persistent variable .