Title: WP_Http::buildCookieHeader
Published: April 25, 2014
Last modified: April 28, 2025

---

# WP_Http::buildCookieHeader( array $r )

## In this article

 * [Description](https://developer.wordpress.org/reference/classes/wp_http/buildcookieheader/?output_format=md#description)
 * [Parameters](https://developer.wordpress.org/reference/classes/wp_http/buildcookieheader/?output_format=md#parameters)
 * [Source](https://developer.wordpress.org/reference/classes/wp_http/buildcookieheader/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wp_http/buildcookieheader/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_http/buildcookieheader/?output_format=md#changelog)

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

Takes the arguments for a ::request() and checks for the cookie array.

## 󠀁[Description](https://developer.wordpress.org/reference/classes/wp_http/buildcookieheader/?output_format=md#description)󠁿

If it’s found, then it upgrades any basic name => value pairs to [WP_Http_Cookie](https://developer.wordpress.org/reference/classes/wp_http_cookie/)
instances, which are each parsed into strings and added to the Cookie: header (within
the arguments array).
Edits the array by reference.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wp_http/buildcookieheader/?output_format=md#parameters)󠁿

 `$r`arrayrequired

Full array of args passed into ::request()

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

    ```php
    public static function buildCookieHeader( &$r ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
    	if ( ! empty( $r['cookies'] ) ) {
    		// Upgrade any name => value cookie pairs to WP_HTTP_Cookie instances.
    		foreach ( $r['cookies'] as $name => $value ) {
    			if ( ! is_object( $value ) ) {
    				$r['cookies'][ $name ] = new WP_Http_Cookie(
    					array(
    						'name'  => $name,
    						'value' => $value,
    					)
    				);
    			}
    		}

    		$cookies_header = '';
    		foreach ( (array) $r['cookies'] as $cookie ) {
    			$cookies_header .= $cookie->getHeaderValue() . '; ';
    		}

    		$cookies_header         = substr( $cookies_header, 0, -2 );
    		$r['headers']['cookie'] = $cookies_header;
    	}
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/class-wp-http.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/class-wp-http.php#L805)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/class-wp-http.php#L805-L827)

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

| Uses | Description | 
| [WP_Http_Cookie::__construct()](https://developer.wordpress.org/reference/classes/wp_http_cookie/__construct/)`wp-includes/class-wp-http-cookie.php` |

Sets up this cookie object.

  |

| Used by | Description | 
| [WP_Http_Curl::request()](https://developer.wordpress.org/reference/classes/wp_http_curl/request/)`wp-includes/class-wp-http-curl.php` |

Send a HTTP request to a URI using cURL extension.

  | 
| [WP_Http_Streams::request()](https://developer.wordpress.org/reference/classes/wp_http_streams/request/)`wp-includes/class-wp-http-streams.php` |

Send a HTTP request to a URI using PHP Streams.

  |

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

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

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