get_headers - PHP code example

The php Function Get_Headers

PHP is a server-side scripting language created with web development in mind. It is free and open source, and it allows developers to create dynamic websites. It is written in a procedural style and uses a scalar variable to hold the information being processed by a program. It has a large set of libraries that provide the functionality required for developing web applications.

The php function get_headers is used to read HTTP request headers from the $_SERVER array. The optional format parameter determines whether the headers should be returned as an associative or indexed array. If the format is set to None, the associative array will return a list of headers; if the format is set to any non-zero value, the headers will be parsed and returned as an indexed array. The return value is an indexed or associative array with the headers, or false on failure.

In addition, if the URL is being redirected, this function will display a Warning on failure to fetch the headers. This is not a bug; it is simply how the function behaves when it encounters a redirect. For this reason, it is recommended to use the cURL functions if you need to fetch the headers for a redirecting URL.

Another thing to keep in mind is that if the $replacement and/or $http_response_code parameters are set, the return will include only those headers whose values match those parameters. For example, if you are redirecting to the same URL using two different 'Location' headers (note that the uppercase L is important), this function will return an associative array with both of these.

get_headers example

    /** * Converts the object to a WP_Http response array. * * @since 4.6.0 * * @return array WP_Http response array, per WP_Http::request(). */
    public function to_array() {
        return array(
            'headers'  => $this->get_headers(),
            'body'     => $this->get_data(),
            'response' => array(
                'code'    => $this->get_status(),
                'message' => get_status_header_desc( $this->get_status() ),
            ),
            'cookies'  => $this->get_cookies(),
            'filename' => $this->filename,
        );
    }
}

$path = $_SERVER['PATH_INFO'];
            } else {
                $path = '/';
            }
        }

        $request = new WP_REST_Request( $_SERVER['REQUEST_METHOD'], $path );

        $request->set_query_params( wp_unslash( $_GET ) );
        $request->set_body_params( wp_unslash( $_POST ) );
        $request->set_file_params( $_FILES );
        $request->set_headers( $this->get_headers( wp_unslash( $_SERVER ) ) );
        $request->set_body( self::get_raw_data() );

        /* * HTTP method override for clients that can't use PUT/PATCH/DELETE. First, we check * $_GET['_method']. If that is not set, we check for the HTTP_X_HTTP_METHOD_OVERRIDE * header. */
        if ( isset( $_GET['_method'] ) ) {
            $request->set_method( $_GET['_method'] );
        } elseif ( isset( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] ) ) {
            $request->set_method( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] );
        }

return $response;
    }

    /* * While WP_HTTP_Response is the base class of WP_REST_Response, it doesn't provide * all the required methods used in WP_REST_Server::dispatch(). */
    if ( $response instanceof WP_HTTP_Response ) {
        return new WP_REST_Response(
            $response->get_data(),
            $response->get_status(),
            $response->get_headers()
        );
    }

    return new WP_REST_Response( $response );
}

/** * Handles _deprecated_function() errors. * * @since 4.4.0 * * @param string $function_name The function that was called. * @param string $replacement The function that should have been called. * @param string $version Version. */

/** * Inserts the attachment post in the database. Does not update the attachment meta. * * @since 5.3.0 * * @param WP_REST_Request $request * @return array|WP_Error */
    protected function insert_attachment( $request ) {
        // Get the file via $_FILES or raw data.         $files   = $request->get_file_params();
        $headers = $request->get_headers();

        if ( ! empty( $files ) ) {
            $file = $this->upload_from_file( $files, $headers );
        } else {
            $file = $this->upload_from_data( $request->get_body(), $headers );
        }

        if ( is_wp_error( $file ) ) {
            return $file;
        }