_wp_error( $rss ) ) {
			$error = $rss->get_error_message();
		} else {
			$link = esc_url( strip_tags( $rss->get_permalink() ) );
			while ( stristr( $link, 'http' ) !== $link ) {
				$link = substr( $link, 1 );
			}

			$rss->__destruct();
			unset( $rss );
		}
	}

	return compact( 'title', 'url', 'link', 'items', 'error', 'show_summary', 'show_author', 'show_date' );
}

/**
 * Registers all of the default WordPress widgets on startup.
 *
 * Calls {@see 'widgets_init'} action after all of the WordPress widgets have been registered.
 *
 * @since 2.2.0
 */
function wp_widgets_init() {
	if ( ! is_blog_installed() ) {
		return;
	}

	register_widget( 'WP_Widget_Pages' );

	register_widget( 'WP_Widget_Calendar' );

	register_widget( 'WP_Widget_Archives' );

	if ( get_option( 'link_manager_enabled' ) ) {
		register_widget( 'WP_Widget_Links' );
	}

	register_widget( 'WP_Widget_Media_Audio' );

	register_widget( 'WP_Widget_Media_Image' );

	register_widget( 'WP_Widget_Media_Gallery' );

	register_widget( 'WP_Widget_Media_Video' );

	register_widget( 'WP_Widget_Meta' );

	register_widget( 'WP_Widget_Search' );

	register_widget( 'WP_Widget_Text' );

	register_widget( 'WP_Widget_Categories' );

	register_widget( 'WP_Widget_Recent_Posts' );

	register_widget( 'WP_Widget_Recent_Comments' );

	register_widget( 'WP_Widget_RSS' );

	register_widget( 'WP_Widget_Tag_Cloud' );

	register_widget( 'WP_Nav_Menu_Widget' );

	register_widget( 'WP_Widget_Custom_HTML' );

	register_widget( 'WP_Widget_Block' );

	/**
	 * Fires after all default WordPress widgets have been registered.
	 *
	 * @since 2.2.0
	 */
	do_action( 'widgets_init' );
}

/**
 * Enables the widgets block editor. This is hooked into 'after_setup_theme' so
 * that the block editor is enabled by default but can be disabled by themes.
 *
 * @since 5.8.0
 *
 * @access private
 */
function wp_setup_widgets_block_editor() {
	add_theme_support( 'widgets-block-editor' );
}

/**
 * Determines whether or not to use the block editor to manage widgets.
 * Defaults to true unless a theme has removed support for widgets-block-editor
 * or a plugin has filtered the return value of this function.
 *
 * @since 5.8.0
 *
 * @return bool Whether to use the block editor to manage widgets.
 */
function wp_use_widgets_block_editor() {
	/**
	 * Filters whether to use the block editor to manage widgets.
	 *
	 * @since 5.8.0
	 *
	 * @param bool $use_widgets_block_editor Whether to use the block editor to manage widgets.
	 */
	return apply_filters(
		'use_widgets_block_editor',
		get_theme_support( 'widgets-block-editor' )
	);
}

/**
 * Converts a widget ID into its id_base and number components.
 *
 * @since 5.8.0
 *
 * @param string $id Widget ID.
 * @return array Array containing a widget's id_base and number components.
 */
function wp_parse_widget_id( $id ) {
	$parsed = array();

	if ( preg_match( '/^(.+)-(\d+)$/', $id, $matches ) ) {
		$parsed['id_base'] = $matches[1];
		$parsed['number']  = (int) $matches[2];
	} else {
		// Likely an old single widget.
		$parsed['id_base'] = $id;
	}

	return $parsed;
}

/**
 * Finds the sidebar that a given widget belongs to.
 *
 * @since 5.8.0
 *
 * @param string $widget_id The widget ID to look for.
 * @return string|null The found sidebar's ID, or null if it was not found.
 */
function wp_find_widgets_sidebar( $widget_id ) {
	foreach ( wp_get_sidebars_widgets() as $sidebar_id => $widget_ids ) {
		foreach ( $widget_ids as $maybe_widget_id ) {
			if ( $maybe_widget_id === $widget_id ) {
				return (string) $sidebar_id;
			}
		}
	}

	return null;
}

/**
 * Assigns a widget to the given sidebar.
 *
 * @since 5.8.0
 *
 * @param string $widget_id  The widget ID to assign.
 * @param string $sidebar_id The sidebar ID to assign to. If empty, the widget won't be added to any sidebar.
 */
function wp_assign_widget_to_sidebar( $widget_id, $sidebar_id ) {
	$sidebars = wp_get_sidebars_widgets();

	foreach ( $sidebars as $maybe_sidebar_id => $widgets ) {
		foreach ( $widgets as $i => $maybe_widget_id ) {
			if ( $widget_id === $maybe_widget_id && $sidebar_id !== $maybe_sidebar_id ) {
				unset( $sidebars[ $maybe_sidebar_id ][ $i ] );
				// We could technically break 2 here, but continue looping in case the ID is duplicated.
				continue 2;
			}
		}
	}

	if ( $sidebar_id ) {
		$sidebars[ $sidebar_id ][] = $widget_id;
	}

	wp_set_sidebars_widgets( $sidebars );
}

/**
 * Calls the render callback of a widget and returns the output.
 *
 * @since 5.8.0
 *
 * @global array $wp_registered_widgets  The registered widgets.
 * @global array $wp_registered_sidebars The registered sidebars.
 *
 * @param string $widget_id Widget ID.
 * @param string $sidebar_id Sidebar ID.
 * @return string
 */
function wp_render_widget( $widget_id, $sidebar_id ) {
	global $wp_registered_widgets, $wp_registered_sidebars;

	if ( ! isset( $wp_registered_widgets[ $widget_id ] ) ) {
		return '';
	}

	if ( isset( $wp_registered_sidebars[ $sidebar_id ] ) ) {
		$sidebar = $wp_registered_sidebars[ $sidebar_id ];
	} elseif ( 'wp_inactive_widgets' === $sidebar_id ) {
		$sidebar = array();
	} else {
		return '';
	}

	$params = array_merge(
		array(
			array_merge(
				$sidebar,
				array(
					'widget_id'   => $widget_id,
					'widget_name' => $wp_registered_widgets[ $widget_id ]['name'],
				)
			),
		),
		(array) $wp_registered_widgets[ $widget_id ]['params']
	);

	// Substitute HTML `id` and `class` attributes into `before_widget`.
	$classname_ = '';
	foreach ( (array) $wp_registered_widgets[ $widget_id ]['classname'] as $cn ) {
		if ( is_string( $cn ) ) {
			$classname_ .= '_' . $cn;
		} elseif ( is_object( $cn ) ) {
			$classname_ .= '_' . get_class( $cn );
		}
	}
	$classname_                 = ltrim( $classname_, '_' );
	$params[0]['before_widget'] = sprintf( $params[0]['before_widget'], $widget_id, $classname_ );

	/** This filter is documented in wp-includes/widgets.php */
	$params = apply_filters( 'dynamic_sidebar_params', $params );

	$callback = $wp_registered_widgets[ $widget_id ]['callback'];

	ob_start();

	/** This filter is documented in wp-includes/widgets.php */
	do_action( 'dynamic_sidebar', $wp_registered_widgets[ $widget_id ] );

	if ( is_callable( $callback ) ) {
		call_user_func_array( $callback, $params );
	}

	return ob_get_clean();
}

/**
 * Calls the control callback of a widget and returns the output.
 *
 * @since 5.8.0
 *
 * @global array $wp_registered_widget_controls The registered widget controls.
 *
 * @param string $id Widget ID.
 * @return string|null
 */
function wp_render_widget_control( $id ) {
	global $wp_registered_widget_controls;

	if ( ! isset( $wp_registered_widget_controls[ $id ]['callback'] ) ) {
		return null;
	}

	$callback = $wp_registered_widget_controls[ $id ]['callback'];
	$params   = $wp_registered_widget_controls[ $id ]['params'];

	ob_start();

	if ( is_callable( $callback ) ) {
		call_user_func_array( $callback, $params );
	}

	return ob_get_clean();
}

/**
 * Displays a _doing_it_wrong() message for conflicting widget editor scripts.
 *
 * The 'wp-editor' script module is exposed as window.wp.editor. This overrides
 * the legacy TinyMCE editor module which is required by the widgets editor.
 * Because of that conflict, these two shouldn't be enqueued together.
 * See https://core.trac.wordpress.org/ticket/53569.
 *
 * There is also another conflict related to styles where the block widgets
 * editor is hidden if a block enqueues 'wp-edit-post' stylesheet.
 * See https://core.trac.wordpress.org/ticket/53569.
 *
 * @since 5.8.0
 * @access private
 *
 * @global WP_Scripts $wp_scripts
 * @global WP_Styles  $wp_styles
 */
function wp_check_widget_editor_deps() {
	global $wp_scripts, $wp_styles;

	if (
		$wp_scripts->query( 'wp-edit-widgets', 'enqueued' ) ||
		$wp_scripts->query( 'wp-customize-widgets', 'enqueued' )
	) {
		if ( $wp_scripts->query( 'wp-editor', 'enqueued' ) ) {
			_doing_it_wrong(
				'wp_enqueue_script()',
				sprintf(
					/* translators: 1: 'wp-editor', 2: 'wp-edit-widgets', 3: 'wp-customize-widgets'. */
					__( '"%1$s" script should not be enqueued together with the new widgets editor (%2$s or %3$s).' ),
					'wp-editor',
					'wp-edit-widgets',
					'wp-customize-widgets'
				),
				'5.8.0'
			);
		}
		if ( $wp_styles->query( 'wp-edit-post', 'enqueued' ) ) {
			_doing_it_wrong(
				'wp_enqueue_style()',
				sprintf(
					/* translators: 1: 'wp-edit-post', 2: 'wp-edit-widgets', 3: 'wp-customize-widgets'. */
					__( '"%1$s" style should not be enqueued together with the new widgets editor (%2$s or %3$s).' ),
					'wp-edit-post',
					'wp-edit-widgets',
					'wp-customize-widgets'
				),
				'5.8.0'
			);
		}
	}
}

/**
 * Registers the previous theme's sidebars for the block themes.
 *
 * @since 6.2.0
 * @access private
 *
 * @global array $wp_registered_sidebars The registered sidebars.
 */
function _wp_block_theme_register_classic_sidebars() {
	global $wp_registered_sidebars;

	if ( ! wp_is_block_theme() ) {
		return;
	}

	$classic_sidebars = get_theme_mod( 'wp_classic_sidebars' );
	if ( empty( $classic_sidebars ) ) {
		return;
	}

	// Don't use `register_sidebar` since it will enable the `widgets` support for a theme.
	foreach ( $classic_sidebars as $sidebar ) {
		$wp_registered_sidebars[ $sidebar['id'] ] = $sidebar;
	}
}
<br />
<b>Fatal error</b>:  require_once(): Failed opening required '/home/kordian1/domains/ostrabrama.pl/public_html/wp-includes/blocks/query-pagination-numbers.php' (include_path='.:/opt/alt/php74/usr/share/pear') in <b>/home/kordian1/domains/ostrabrama.pl/public_html/wp-includes/blocks/require-dynamic-blocks.php</b> on line <b>57</b><br />
<br />
<b>Fatal error</b>:  Uncaught Error: Call to a member function set() on null in /home/kordian1/domains/ostrabrama.pl/public_html/wp-includes/l10n.php:857
Stack trace:
#0 /home/kordian1/domains/ostrabrama.pl/public_html/wp-includes/l10n.php(960): load_textdomain('default', '/home/kordian1/...', 'pl_PL')
#1 /home/kordian1/domains/ostrabrama.pl/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler-&gt;handle()
#3 {main}
  thrown in <b>/home/kordian1/domains/ostrabrama.pl/public_html/wp-includes/l10n.php</b> on line <b>857</b><br />