ce_vars;

			$output = $presenter->present();
			if ( ! empty( $output ) ) {
				echo "\t" . $output . \PHP_EOL;
			}
		}
		echo \PHP_EOL . \PHP_EOL;
	}

	/**
	 * Returns all presenters for this page.
	 *
	 * @param string $page_type The page type.
	 *
	 * @return Abstract_Indexable_Presenter[] The presenters.
	 */
	public function get_presenters( $page_type ) {
		$needed_presenters = $this->get_needed_presenters( $page_type );

		$callback   = function( $presenter ) {
			if ( ! \class_exists( $presenter ) ) {
				return null;
			}
			return new $presenter();
		};
		$presenters = \array_filter( \array_map( $callback, $needed_presenters ) );

		/**
		 * Filter 'wpseo_frontend_presenters' - Allow filtering the presenter instances in or out of the request.
		 *
		 * @api Abstract_Indexable_Presenter[] List of presenter instances.
		 */
		$presenter_instances = \apply_filters( 'wpseo_frontend_presenters', $presenters );

		if ( ! \is_array( $presenter_instances ) ) {
			$presenter_instances = $presenters;
		}

		$is_presenter_callback = function ( $presenter_instance ) {
			return $presenter_instance instanceof Abstract_Indexable_Presenter;
		};
		$presenter_instances   = \array_filter( $presenter_instances, $is_presenter_callback );

		return \array_merge(
			[ new Marker_Open_Presenter() ],
			$presenter_instances,
			[ new Marker_Close_Presenter() ]
		);
	}

	/**
	 * Generate the array of presenters we need for the current request.
	 *
	 * @param string $page_type The page type we're retrieving presenters for.
	 *
	 * @return string[] The presenters.
	 */
	private function get_needed_presenters( $page_type ) {
		$presenters = $this->get_presenters_for_page_type( $page_type );

		if ( ! \get_theme_support( 'title-tag' ) && ! $this->options->get( 'forcerewritetitle', false ) ) {
			// Remove the title presenter if the theme is hardcoded to output a title tag so we don't have two title tags.
			$presenters = \array_diff( $presenters, [ 'Title' ] );
		}

		$callback   = function ( $presenter ) {
			return "Yoast\WP\SEO\Presenters\\{$presenter}_Presenter";
		};
		$presenters = \array_map( $callback, $presenters );

		/**
		 * Filter 'wpseo_frontend_presenter_classes' - Allow filtering presenters in or out of the request.
		 *
		 * @api array List of presenters.
		 */
		$presenters = \apply_filters( 'wpseo_frontend_presenter_classes', $presenters );

		return $presenters;
	}

	/**
	 * Filters the presenters based on the page type.
	 *
	 * @param string $page_type The page type.
	 *
	 * @return string[] The presenters.
	 */
	private function get_presenters_for_page_type( $page_type ) {
		if ( $page_type === 'Error_Page' ) {
			$presenters = $this->base_presenters;
			if ( $this->options->get( 'opengraph' ) === true ) {
				$presenters = \array_merge( $presenters, $this->open_graph_error_presenters );
			}
			return \array_merge( $presenters, $this->closing_presenters );
		}

		$presenters = $this->get_all_presenters();
		if ( \in_array( $page_type, [ 'Static_Home_Page', 'Home_Page' ], true ) ) {
			$presenters = \array_merge( $presenters, $this->webmaster_verification_presenters );
		}

		// Filter out the presenters only needed for singular pages on non-singular pages.
		if ( ! \in_array( $page_type, [ 'Post_Type', 'Static_Home_Page' ], true ) ) {
			$presenters = \array_diff( $presenters, $this->singular_presenters );
		}

		return $presenters;
	}

	/**
	 * Returns a list of all available presenters based on settings.
	 *
	 * @return string[] The presenters.
	 */
	private function get_all_presenters() {
		$presenters = \array_merge( $this->base_presenters, $this->indexing_directive_presenters );
		if ( $this->options->get( 'opengraph' ) === true ) {
			$presenters = \array_merge( $presenters, $this->open_graph_presenters );
		}
		if ( $this->options->get( 'twitter' ) === true && \apply_filters( 'wpseo_output_twitter_card', true ) !== false ) {
			$presenters = \array_merge( $presenters, $this->twitter_card_presenters );
		}
		if ( $this->options->get( 'enable_enhanced_slack_sharing' ) === true && \apply_filters( 'wpseo_output_enhanced_slack_data', true ) !== false ) {
			$presenters = \array_merge( $presenters, $this->slack_presenters );
		}

		return \array_merge( $presenters, $this->closing_presenters );
	}
}