Title: WP_HTTP_Proxy::authentication_header
Published: April 25, 2014
Last modified: April 28, 2025

---

# WP_HTTP_Proxy::authentication_header(): string

## In this article

 * [Return](https://developer.wordpress.org/reference/classes/wp_http_proxy/authentication_header/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wp_http_proxy/authentication_header/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wp_http_proxy/authentication_header/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_http_proxy/authentication_header/?output_format=md#changelog)

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

Retrieve header string for proxy authentication.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wp_http_proxy/authentication_header/?output_format=md#return)󠁿

 string

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

    ```php
    public function authentication_header() {
    	return 'Proxy-Authorization: Basic ' . base64_encode( $this->authentication() );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/class-wp-http-proxy.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/class-wp-http-proxy.php#L155)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/class-wp-http-proxy.php#L155-L157)

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

| Uses | Description | 
| [WP_HTTP_Proxy::authentication()](https://developer.wordpress.org/reference/classes/wp_http_proxy/authentication/)`wp-includes/class-wp-http-proxy.php` |

Retrieve authentication string for proxy authentication.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wp_http_proxy/authentication_header/?output_format=md#changelog)󠁿

| Version | Description | 
| [2.8.0](https://developer.wordpress.org/reference/since/2.8.0/) | Introduced. |

## User Contributed Notes

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