=> $error_code,
					'api_message' => $api_message,
				],
			]
			);

		return false;
	}

	// HTTP 400 - Validation error like BAD_SITE_URL.
	if ( 400 === $http_code ) {
		$error_code  = isset( $json->error->code ) ? $json->error->code : 'UNKNOWN_ERROR';
		$api_message = isset( $json->error->message ) ? $json->error->message : null;

		Logger::error(
			'License validation failed.',
			[
				'license validation process',
				'http_code'  => 400,
				'error_code' => $error_code,
			]
		);

		// CL: Store error code for later translation in admin notice (after init hook).
		set_transient(
			'rocket_check_key_errors',
			[
				[
					'code'        => $error_code,
					'api_message' => $api_message,
				],
			] 
			);

		return false;
	}

	// HTTP 5xx - Server error, don't delete key.
	if ( $http_code >= 500 ) {
		Logger::error(
			'License validation failed. Server error.',
			[
				'license validation process',
				'http_code' => $http_code,
			]
		);

		// CL: Store error code for later translation in admin notice (after init hook).
		set_transient(
			'rocket_check_key_errors',
			[
				[
					'code'      => 'SERVER_ERROR',
					'http_code' => $http_code,
				],
			] 
			);

		return $return;
	}

	// HTTP 200 - Success.
	if ( 200 === $http_code && isset( $json->data->secret_key ) ) {
		delete_transient( 'wp_rocket_customer_data' );

		$rocket_options['secret_key'] = $json->data->secret_key;

		if ( ! get_rocket_option( 'license' ) ) {
			$rocket_options['license'] = '1';
		}

		Logger::info( 'License validation successful.', [ 'license validation process' ] );

		set_transient( rocket_get_constant( 'WP_ROCKET_SLUG' ), $rocket_options );
		delete_transient( 'rocket_check_key_errors' );
		rocket_delete_licence_data_file();
		update_option( 'wp_rocket_no_licence', 0 );

		return $rocket_options;
	}

	// Unexpected response.
	Logger::error(
		'License validation failed. Unexpected response.',
		[
			'license validation process',
			'http_code' => $http_code,
		]
	);

	// CL: Store error code for later translation in admin notice (after init hook).
	set_transient(
		'rocket_check_key_errors',
		[
			[
				'code'      => 'UNEXPECTED_RESPONSE',
				'http_code' => $http_code,
			],
		] 
		);

	return $return;
}

/**
 * Deletes the licence-data.php file if it exists
 *
 * @since 3.5
 * @author Remy Perona
 *
 * @return void
 */
function rocket_delete_licence_data_file() {
	// CL: Do not delete licence-data.php in non-standalone mode.
	if ( false === clsop_is_standalone() ) {
		return;
	}

	if ( is_multisite() ) {
		return;
	}

	$rocket_path = rocket_get_constant( 'WP_ROCKET_PATH' );

	if ( ! rocket_direct_filesystem()->exists( $rocket_path . 'licence-data.php' ) ) {
		return;
	}

	rocket_direct_filesystem()->delete( $rocket_path . 'licence-data.php' );
}

/**
 * Is WP a MultiSite and a subfolder install?
 *
 * @since  3.1.1
 * @author Grégory Viguier
 *
 * @return bool
 */
function rocket_is_subfolder_install() {
	global $wpdb;
	static $subfolder_install;

	if ( isset( $subfolder_install ) ) {
		return $subfolder_install;
	}

	if ( is_multisite() ) {
		$subfolder_install = ! is_subdomain_install();
	} elseif ( ! is_null( $wpdb->sitemeta ) ) {
		$subfolder_install = ! $wpdb->get_var( "SELECT meta_value FROM $wpdb->sitemeta WHERE site_id = 1 AND meta_key = 'subdomain_install'" );  // phpcs:ignore WordPress.DB.DirectDatabaseQuery
	} else {
		$subfolder_install = false;
	}

	return $subfolder_install;
}

/**
 * Get the name of the "home directory", in case the home URL is not at the domain's root.
 * It can be seen like the `RewriteBase` from the .htaccess file, but without the trailing slash.
 *
 * @since  3.1.1
 * @author Grégory Viguier
 *
 * @return string
 */
function rocket_get_home_dirname() {
	static $home_root;

	if ( isset( $home_root ) ) {
		return $home_root;
	}

	$home_root = wp_parse_url( rocket_get_main_home_url() );

	if ( ! empty( $home_root['path'] ) ) {
		$home_root = '/' . trim( $home_root['path'], '/' );
		$home_root = rtrim( $home_root, '/' );
	} else {
		$home_root = '';
	}

	return $home_root;
}

/**
 * Get the URL of the site's root. It corresponds to the main site's home page URL.
 *
 * @since  3.1.1
 * @author Grégory Viguier
 *
 * @return string
 */
function rocket_get_main_home_url() {
	static $root_url;

	if ( isset( $root_url ) ) {
		return $root_url;
	}

	if ( ! is_multisite() || is_main_site() ) {
		$root_url = rocket_get_home_url( '/' );
		return $root_url;
	}

	$current_network = get_network();

	if ( $current_network ) {
		$root_url = set_url_scheme( 'https://' . $current_network->domain . $current_network->path );
		$root_url = trailingslashit( $root_url );
	} else {
		$root_url = rocket_get_home_url( '/' );
	}

	return $root_url;
}