Symfony\Component\HttpFoundation\Cookie::__toString PHP Method

    public function __toString()
    {
        $str = ($this->isRaw() ? $this->getName() : urlencode($this->getName())).'=';

        if ('' === (string) $this->getValue()) {
            $str .= 'deleted; expires='.gmdate('D, d-M-Y H:i:s T', time() - 31536001).'; max-age=-31536001';
        } else {
            $str .= $this->isRaw() ? $this->getValue() : urlencode($this->getValue());

            if ($this->getExpiresTime() !== 0) {
                $str .= '; expires='.gmdate('D, d-M-Y H:i:s T', $this->getExpiresTime()).'; max-age='.$this->getMaxAge();
            }
        }

        if ($this->getPath()) {
            $str .= '; path='.$this->getPath();
        }

        if ($this->getDomain()) {
            $str .= '; domain='.$this->getDomain();
        }

        if (true === $this->isSecure()) {
            $str .= '; secure';
        }

        if (true === $this->isHttpOnly()) {
            $str .= '; httponly';
        }

        if (null !== $this->getSameSite()) {
            $str .= '; samesite='.$this->getSameSite();
        }

        return $str;
    }

 public function testToString()
 {
     $cookie = new Cookie('foo', 'bar', strtotime('Fri, 20-May-2011 15:25:52 GMT'), '/', '.myfoodomain.com', true);
     $this->assertEquals('foo=bar; expires=Fri, 20-May-2011 15:25:52 GMT; path=/; domain=.myfoodomain.com; secure; httponly', $cookie->__toString(), '->__toString() returns string representation of the cookie');
     $cookie = new Cookie('foo', null, 1, '/admin/', '.myfoodomain.com');
     $this->assertEquals('foo=deleted; expires=' . gmdate('D, d-M-Y H:i:s T', time() - 31536001) . '; path=/admin/; domain=.myfoodomain.com; httponly', $cookie->__toString(), '->__toString() returns string representation of a cleared cookie if value is NULL');
     $cookie = new Cookie('foo', 'bar', 0, '/', '');
     $this->assertEquals('foo=bar; path=/; httponly', $cookie->__toString());
 }