1 <?php

     2 

     3 /*

     4  * This file is part of the Symfony package.

     5  *

     6  * (c) Fabien Potencier <fabien@symfony.com>

     7  *

     8  * For the full copyright and license information, please view the LICENSE

     9  * file that was distributed with this source code.

    10  */

    11 

    12 namespace Symfony\Component\DependencyInjection;

    13 

    14 /**

    15  * Parameter represents a parameter reference.

    16  *

    17  * @author Fabien Potencier <fabien@symfony.com>

    18  *

    19  * @api

    20  */

    21 class Parameter

    22 {

    23     private $id;

    24 

    25     /**

    26      * Constructor.

    27      *

    28      * @param string $id The parameter key

    29      */

    30     public function __construct($id)

    31     {

    32         $this->id = $id;

    33     }

    34 

    35     /**

    36      * __toString.

    37      *

    38      * @return string The parameter key

    39      */

    40     public function __toString()

    41     {

    42         return (string) $this->id;

    43     }

    44 }