WordPress REST user Basic auth example

wp-rest-basic-auth-example.php

//Send request to http(s)://yourdomain.com/wp-json/test/v1/test

class WP_REST {

    function __construct() {
        add_action( 'rest_api_init', array( $this, 'routes' ) );
    }

    function auth_user( $request ) {
		
      $valid = false;

      $headers = $request->get_headers();

      if( isset( $headers['authorization'] ) && isset( $headers['authorization'][0] ) ) {
        $auth = str_replace('Basic ', '', $headers['authorization'][0]);
        $auth = base64_decode( $auth );
        $auth = explode( ':', $auth );
        $user = isset( $auth[0] ) && isset( $auth[1] ) ? wp_authenticate( $auth[0], $auth[1] ) : null;
        if( ! is_wp_error( $user ) && isset( $user->caps['administrator'] ) ) {
          $valid = true;
        }
      }

      return $valid;

    }

    function routes() {

        $namespace = 'test/v1';

        register_rest_route( $namespace, '/test', array( // This one needs to be in the plugin
            'methods'  => WP_REST_Server::READABLE,
            'callback' => array( $this, 'callback' ),
            'permission_callback' => function ( $request ) {
              return $this->auth_user( $request );
            },
            'args' => array()
        ) );

    }

    function callback( $request ) {

        return new \WP_REST_Response( array(
			
        ), 200 );

    }

}