src/web/Session.php
public function bind($key, & $value) {
        $this->open();

        $this->_data[$key] =& $value;

        return $this;
    }
public function bind($key, & $value) {
        $this->open();

        $this->_data[$key] =& $value;

        return $this;
    }
Set a variable by reference.

$session->bind('foo', $foo);

@param   string $key variable name
@param   mixed $value referenced value
@return  $this