fference ] );
		}

		ksort( self::$dependency_api_data );
		// Remove empty elements.
		self::$dependency_api_data = array_filter( self::$dependency_api_data );
		set_site_transient( 'wp_plugin_dependencies_plugin_data', self::$dependency_api_data, 0 );

		return self::$dependency_api_data;
	}

	/**
	 * Gets plugin directory names.
	 *
	 * @since 6.5.0
	 *
	 * @return array An array of plugin directory names.
	 */
	protected static function get_plugin_dirnames() {
		if ( is_array( self::$plugin_dirnames ) ) {
			return self::$plugin_dirnames;
		}

		self::$plugin_dirnames = array();

		$plugin_files = array_keys( self::get_plugins() );
		foreach ( $plugin_files as $plugin_file ) {
			$slug                           = self::convert_to_slug( $plugin_file );
			self::$plugin_dirnames[ $slug ] = $plugin_file;
		}

		return self::$plugin_dirnames;
	}

	/**
	 * Gets circular dependency data.
	 *
	 * @since 6.5.0
	 *
	 * @return array[] An array of circular dependency pairings.
	 */
	protected static function get_circular_dependencies() {
		if ( is_array( self::$circular_dependencies_pairs ) ) {
			return self::$circular_dependencies_pairs;
		}

		if ( null === self::$dependencies ) {
			return array();
		}

		self::$circular_dependencies_slugs = array();

		self::$circular_dependencies_pairs = array();
		foreach ( self::$dependencies as $dependent => $dependencies ) {
			/*
			 * $dependent is in 'a/a.php' format. Dependencies are stored as slugs, i.e. 'a'.
			 *
			 * Convert $dependent to slug format for checking.
			 */
			$dependent_slug = self::convert_to_slug( $dependent );

			self::$circular_dependencies_pairs = array_merge(
				self::$circular_dependencies_pairs,
				self::check_for_circular_dependencies( array( $dependent_slug ), $dependencies )
			);
		}

		return self::$circular_dependencies_pairs;
	}

	/**
	 * Checks for circular dependencies.
	 *
	 * @since 6.5.0
	 *
	 * @param array $dependents   Array of dependent plugins.
	 * @param array $dependencies Array of plugins dependencies.
	 * @return array A circular dependency pairing, or an empty array if none exists.
	 */
	protected static function check_for_circular_dependencies( $dependents, $dependencies ) {
		$circular_dependencies_pairs = array();

		// Check for a self-dependency.
		$dependents_location_in_its_own_dependencies = array_intersect( $dependents, $dependencies );
		if ( ! empty( $dependents_location_in_its_own_dependencies ) ) {
			foreach ( $dependents_location_in_its_own_dependencies as $self_dependency ) {
				self::$circular_dependencies_slugs[] = $self_dependency;
				$circular_dependencies_pairs[]       = array( $self_dependency, $self_dependency );

				// No need to check for itself again.
				unset( $dependencies[ array_search( $self_dependency, $dependencies, true ) ] );
			}
		}

		/*
		 * Check each dependency to see:
		 * 1. If it has dependencies.
		 * 2. If its list of dependencies includes one of its own dependents.
		 */
		foreach ( $dependencies as $dependency ) {
			// Check if the dependency is also a dependent.
			$dependency_location_in_dependents = array_search( $dependency, self::$dependent_slugs, true );

			if ( false !== $dependency_location_in_dependents ) {
				$dependencies_of_the_dependency = self::$dependencies[ $dependency_location_in_dependents ];

				foreach ( $dependents as $dependent ) {
					// Check if its dependencies includes one of its own dependents.
					$dependent_location_in_dependency_dependencies = array_search(
						$dependent,
						$dependencies_of_the_dependency,
						true
					);

					if ( false !== $dependent_location_in_dependency_dependencies ) {
						self::$circular_dependencies_slugs[] = $dependent;
						self::$circular_dependencies_slugs[] = $dependency;
						$circular_dependencies_pairs[]       = array( $dependent, $dependency );

						// Remove the dependent from its dependency's dependencies.
						unset( $dependencies_of_the_dependency[ $dependent_location_in_dependency_dependencies ] );
					}
				}

				$dependents[] = $dependency;

				/*
				 * Now check the dependencies of the dependency's dependencies for the dependent.
				 *
				 * Yes, that does make sense.
				 */
				$circular_dependencies_pairs = array_merge(
					$circular_dependencies_pairs,
					self::check_for_circular_dependencies( $dependents, array_unique( $dependencies_of_the_dependency ) )
				);
			}
		}

		return $circular_dependencies_pairs;
	}

	/**
	 * Converts a plugin filepath to a slug.
	 *
	 * @since 6.5.0
	 *
	 * @param string $plugin_file The plugin's filepath, relative to the plugins directory.
	 * @return string The plugin's slug.
	 */
	protected static function convert_to_slug( $plugin_file ) {
		if ( 'hello.php' === $plugin_file ) {
			return 'hello-dolly';
		}
		return str_contains( $plugin_file, '/' ) ? dirname( $plugin_file ) : str_replace( '.php', '', $plugin_file );
	}
}
<br />
<b>Fatal error</b>:  require(): Failed opening required '/home/tourismg/public_html/wp-content/plugins/wordpress-seo/vendor/composer/autoload_static.php' (include_path='.:') in <b>/home/tourismg/public_html/wp-content/plugins/wordpress-seo/vendor/composer/autoload_real.php</b> on line <b>33</b><br />