r   Error information retrieved from `error_get_last()`.
	 * @param true|WP_Error $handled Whether Recovery Mode handled the fatal error.
	 */
	protected function display_error_template( $error, $handled ) {
		if ( defined( 'WP_CONTENT_DIR' ) ) {
			// Load custom PHP error template, if present.
			$php_error_pluggable = WP_CONTENT_DIR . '/php-error.php';
			if ( is_readable( $php_error_pluggable ) ) {
				require_once $php_error_pluggable;

				return;
			}
		}

		// Otherwise, display the default error template.
		$this->display_default_error_template( $error, $handled );
	}

	/**
	 * Displays the default PHP error template.
	 *
	 * This method is called conditionally if no 'php-error.php' drop-in is available.
	 *
	 * It calls {@see wp_die()} with a message indicating that the site is experiencing technical difficulties and a
	 * login link to the admin backend. The {@see 'wp_php_error_message'} and {@see 'wp_php_error_args'} filters can
	 * be used to modify these parameters.
	 *
	 * @since 5.2.0
	 * @since 5.3.0 The `$handled` parameter was added.
	 *
	 * @param array         $error   Error information retrieved from `error_get_last()`.
	 * @param true|WP_Error $handled Whether Recovery Mode handled the fatal error.
	 */
	protected function display_default_error_template( $error, $handled ) {
		if ( ! function_exists( '__' ) ) {
			wp_load_translations_early();
		}

		if ( ! function_exists( 'wp_die' ) ) {
			require_once ABSPATH . WPINC . '/functions.php';
		}

		if ( ! class_exists( 'WP_Error' ) ) {
			require_once ABSPATH . WPINC . '/class-wp-error.php';
		}

		if ( true === $handled && wp_is_recovery_mode() ) {
			$message = __( 'There has been a critical error on this website, putting it in recovery mode. Please check the Themes and Plugins screens for more details. If you just installed or updated a theme or plugin, check the relevant page for that first.' );
		} elseif ( is_protected_endpoint() ) {
			$message = __( 'There has been a critical error on this website. Please check your site admin email inbox for instructions.' );
		} else {
			$message = __( 'There has been a critical error on this website.' );
		}

		$message = sprintf(
			'<p>%s</p><p><a href="%s">%s</a></p>',
			$message,
			/* translators: Documentation about troubleshooting. */
			__( 'https://wordpress.org/support/article/faq-troubleshooting/' ),
			__( 'Learn more about troubleshooting WordPress.' )
		);

		$args = array(
			'response' => 500,
			'exit'     => false,
		);

		/**
		 * Filters the message that the default PHP error template displays.
		 *
		 * @since 5.2.0
		 *
		 * @param string $message HTML error message to display.
		 * @param array  $error   Error information retrieved from `error_get_last()`.
		 */
		$message = apply_filters( 'wp_php_error_message', $message, $error );

		/**
		 * Filters the arguments passed to {@see wp_die()} for the default PHP error template.
		 *
		 * @since 5.2.0
		 *
		 * @param array $args Associative array of arguments passed to `wp_die()`. By default these contain a
		 *                    'response' key, and optionally 'link_url' and 'link_text' keys.
		 * @param array $error Error information retrieved from `error_get_last()`.
		 */
		$args = apply_filters( 'wp_php_error_args', $args, $error );

		$wp_error = new WP_Error(
			'internal_server_error',
			$message,
			array(
				'error' => $error,
			)
		);

		wp_die( $wp_error, '', $args );
	}
}
efine( 'MINUTE_IN_SECONDS', 60 );
	define( 'HOUR_IN_SECONDS', 60 * MINUTE_IN_SECONDS );
	define( 'DAY_IN_SECONDS', 24 * HOUR_IN_SECONDS );
	define( 'WEEK_IN_SECONDS', 7 * DAY_IN_SECONDS );
	define( 'MONTH_IN_SECONDS', 30 * DAY_IN_SECONDS );
	define( 'YEAR_IN_SECONDS', 365 * DAY_IN_SECONDS );
	/**#@-*/
}

/**
 * Defines plugin directory WordPress constants.
 *
 * Defines must-use plugin directory constants, which may be overridden in the sunrise.php drop-in.
 *
 * @since 3.0.0
 */
function wp_plugin_directory_constants() {
	if ( ! defined( 'WP_CONTENT_URL' ) ) {
		define( 'WP_CONTENT_URL', get_option( 'siteurl' ) . '/wp-content' ); // Full URL - WP_CONTENT_DIR is defined further up.
	}

	/**
	 * Allows for the plugins directory to be moved from the default location.
	 *
	 * @since 2.6.0
	 */
	if ( ! defined( 'WP_PLUGIN_DIR' ) ) {
		define( 'WP_PLUGIN_DIR', WP_CONTENT_DIR . '/plugins' ); // Full path, no trailing slash.
	}

	/**
	 * Allows for the plugins directory to be moved from the default location.
	 *
	 * @since 2.6.0
	 */
	if ( ! defined( 'WP_PLUGIN_URL' ) ) {
		define( 'WP_PLUGIN_URL', WP_CONTENT_URL . '/plugins' ); // Full URL, no trailing slash.
	}

	/**
	 * Allows for the plugins directory to be moved from the default location.
	 *
	 * @since 2.1.0
	 * @deprecated
	 */
	if ( ! defined( 'PLUGINDIR' ) ) {
		define( 'PLUGINDIR', 'wp-content/plugins' ); // Relative to ABSPATH. For back compat.
	}

	/**
	 * Allows for the mu-plugins directory to be moved from the default location.
	 *
	 * @since 2.8.0
	 */
	if ( ! defined( 'WPMU_PLUGIN_DIR' ) ) {
		define( 'WPMU_PLUGIN_DIR', WP_CONTENT_DIR . '/mu-plugins' ); // Full path, no trailing slash.
	}

	/**
	 * Allows for the mu-plugins directory to be moved from the default location.
	 *
	 * @since 2.8.0
	 */
	if ( ! defined( 'WPMU_PLUGIN_URL' ) ) {
		define( 'WPMU_PLUGIN_URL', WP_CONTENT_URL . '/mu-plugins' ); // Full URL, no trailing slash.
	}

	/**
	 * Allows for the mu-plugins directory to be moved from the default location.
	 *
	 * @since 2.8.0
	 * @deprecated
	 */
	if ( ! defined( 'MUPLUGINDIR' ) ) {
		define( 'MUPLUGINDIR', 'wp-content/mu-plugins' ); // Relative to ABSPATH. For back compat.
	}
}

/**
 * Defines cookie-related WordPress constants.
 *
 * Defines constants after multisite is loaded.
 *
 * @since 3.0.0
 */
function wp_cookie_constants() {
	/**
	 * Used to guarantee unique hash cookies.
	 *
	 * @since 1.5.0
	 */
	if ( ! defined( 'COOKIEHASH' ) ) {
		$siteurl = get_site_option( 'siteurl' );
		if ( $siteurl ) {
			define( 'COOKIEHASH', md5( $siteurl ) );
		} else {
			define( 'COOKIEHASH', '' );
		}
	}

	/**
	 * @since 2.0.0
	 */
	if ( ! defined( 'USER_COOKIE' ) ) {
		define( 'USER_COOKIE', 'wordpressuser_' . COOKIEHASH );
	}

	/**
	 * @since 2.0.0
	 */
	if ( ! defined( 'PASS_COOKIE' ) ) {
		define( 'PASS_COOKIE', 'wordpresspass_' . COOKIEHASH );
	}

	/**
	 * @since 2.5.0
	 */
	if ( ! defined( 'AUTH_COOKIE' ) ) {
		define( 'AUTH_COOKIE', 'wordpress_' . COOKIEHASH );
	}

	/**
	 * @since 2.6.0
	 */
	if ( ! defined( 'SECURE_AUTH_COOKIE' ) ) {
		define( 'SECURE_AUTH_COOKIE', 'wordpress_sec_' . COOKIEHASH );
	}

	/**
	 * @since 2.6.0
	 */
	if ( ! defined( 'LOGGED_IN_COOKIE' ) ) {
		define( 'LOGGED_IN_COOKIE', 'wordpress_logged_in_' . COOKIEHASH );
	}

	/**
	 * @since 2.3.0
	 */
	if ( ! defined( 'TEST_COOKIE' ) ) {
		define( 'TEST_COOKIE', 'wordpress_test_cookie' );
	}

	/**
	 * @since 1.2.0
	 */
	if ( ! defined( 'COOKIEPATH' ) ) {
		define( 'COOKIEPATH', preg_replace( '|https?://[^/]+|i', '', get_option( 'home' ) . '/' ) );
	}

	/**
	 * @since 1.5.0
	 */
	if ( ! defined( 'SITECOOKIEPATH' ) ) {
		define( 'SITECOOKIEPATH', preg_replace( '|https?://[^/]+|i', '', get_option( 'siteurl' ) . '/' ) );
	}

	/**
	 * @since 2.6.0
	 */
	if ( ! defined( 'ADMIN_COOKIE_PATH' ) ) {
		define( 'ADMIN_COOKIE_PATH', SITECOOKIEPATH . 'wp-admin' );
	}

	/**
	 * @since 2.6.0
	 */
	if ( ! defined( 'PLUGINS_COOKIE_PATH' ) ) {
		define( 'PLUGINS_COOKIE_PATH', preg_replace( '|https?://[^/]+|i', '', WP_PLUGIN_URL ) );
	}

	/**
	 * @since 2.0.0
	 */
	if ( ! defined( 'COOKIE_DOMAIN' ) ) {
		define( 'COOKIE_DOMAIN', false );
	}

	if ( ! defined( 'RECOVERY_MODE_COOKIE' ) ) {
		/**
		 * @since 5.2.0
		 */
		define( 'RECOVERY_MODE_COOKIE', 'wordpress_rec_' . COOKIEHASH );
	}
}

/**
 * Defines SSL-related WordPress constants.
 *
 * @since 3.0.0
 */
function wp_ssl_constants() {
	/**
	 * @since 2.6.0
	 */
	if ( ! defined( 'FORCE_SSL_ADMIN' ) ) {
		if ( 'https' === parse_url( get_option( 'siteurl' ), PHP_URL_SCHEME ) ) {
			define( 'FORCE_SSL_ADMIN', true );
		} else {
			define( 'FORCE_SSL_ADMIN', false );
		}
	}
	force_ssl_admin( FORCE_SSL_ADMIN );

	/**
	 * @since 2.6.0
	 * @deprecated 4.0.0
	 */
	if ( defined( 'FORCE_SSL_LOGIN' ) && FORCE_SSL_LOGIN ) {
		force_ssl_admin( true );
	}
}

/**
 * Defines functionality-related WordPress constants.
 *
 * @since 3.0.0
 */
function wp_functionality_constants() {
	/**
	 * @since 2.5.0
	 */
	if ( ! defined( 'AUTOSAVE_INTERVAL' ) ) {
		define( 'AUTOSAVE_INTERVAL', MINUTE_IN_SECONDS );
	}

	/**
	 * @since 2.9.0
	 */
	if ( ! defined( 'EMPTY_TRASH_DAYS' ) ) {
		define( 'EMPTY_TRASH_DAYS', 30 );
	}

	if ( ! defined( 'WP_POST_REVISIONS' ) ) {
		define( 'WP_POST_REVISIONS', true );
	}

	/**
	 * @since 3.3.0
	 */
	if ( ! defined( 'WP_CRON_LOCK_TIMEOUT' ) ) {
		define( 'WP_CRON_LOCK_TIMEOUT', MINUTE_IN_SECONDS );
	}
}

/**
 * Defines templating-related WordPress constants.
 *
 * @since 3.0.0
 */
function wp_templating_constants() {
	/**
	 * Filesystem path to the current active template directory.
	 *
	 * @since 1.5.0
	 */
	define( 'TEMPLATEPATH', get_template_directory() );

	/**
	 * Filesystem path to the current active template stylesheet directory.
	 *
	 * @since 2.1.0
	 */
	define( 'STYLESHEETPATH', get_stylesheet_directory() );

	/**
	 * Slug of the default theme for this installation.
	 * Used as the default theme when installing new sites.
	 * It will be used as the fallback if the current theme doesn't exist.
	 *
	 * @since 3.0.0
	 *
	 * @see WP_Theme::get_core_default_theme()
	 */
	if ( ! defined( 'WP_DEFAULT_THEME' ) ) {
		define( 'WP_DEFAULT_THEME', 'twentytwentyone' );
	}

}