Title: IXR_Server::setCapabilities
Published: July 6, 2022
Last modified: August 20, 2026

---

# IXR_Server::setCapabilities()

## In this article

 * [Source](https://developer.wordpress.org/reference/classes/ixr_server/setcapabilities/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/ixr_server/setcapabilities/?output_format=md#related)

[ Back to top](https://developer.wordpress.org/reference/classes/ixr_server/setcapabilities/?output_format=md#wp--skip-link--target)

## 󠀁[Source](https://developer.wordpress.org/reference/classes/ixr_server/setcapabilities/?output_format=md#source)󠁿

    ```php
    function setCapabilities()
    {
        // Initialises capabilities array
        $this->capabilities = array(
            'xmlrpc' => array(
                'specUrl' => 'https://xmlrpc.com/spec.md',
                'specVersion' => 1
        ),
            'faults_interop' => array(
                'specUrl' => 'https://web.archive.org/web/20240416231938/https://xmlrpc-epi.sourceforge.net/specs/rfc.fault_codes.php',
                'specVersion' => 20010516
        ),
            'system.multicall' => array(
                'specUrl' => 'https://web.archive.org/web/20060624230303/http://www.xmlrpc.com/discuss/msgReader$1208?mode=topic',
                'specVersion' => 1
        ),
        );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/ixr/class-ixr-server.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.1/src/wp-includes/IXR/class-IXR-server.php#L159)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/IXR/class-IXR-server.php#L159-L176)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/ixr_server/setcapabilities/?output_format=md#related)󠁿

| Used by | Description | 
| [IXR_Server::__construct()](https://developer.wordpress.org/reference/classes/ixr_server/__construct/)`wp-includes/IXR/class-IXR-server.php` |

PHP5 constructor.

  |

## User Contributed Notes

You must [log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fdeveloper.wordpress.org%2Freference%2Fclasses%2Fixr_server%2Fsetcapabilities%2F)
before being able to contribute a note or feedback.