metabox( $identifier );
		}

		return false;
	}

	/**
	 * Determines whether the plugin is active for the entire network.
	 *
	 * @return bool Whether or not the plugin is network-active.
	 */
	public static function is_plugin_network_active() {
		static $network_active = null;

		if ( ! is_multisite() ) {
			return false;
		}

		// If a cached result is available, bail early.
		if ( $network_active !== null ) {
			return $network_active;
		}

		$network_active_plugins = wp_get_active_network_plugins();

		// Consider MU plugins and network-activated plugins as network-active.
		$network_active = strpos( wp_normalize_path( WPSEO_FILE ), wp_normalize_path( WPMU_PLUGIN_DIR ) ) === 0
			|| in_array( WP_PLUGIN_DIR . '/' . WPSEO_BASENAME, $network_active_plugins, true );

		return $network_active;
	}

	/**
	 * Gets the type of the current post.
	 *
	 * @return string The post type, or an empty string.
	 */
	public static function get_post_type() {
		global $post;

		if ( isset( $post->post_type ) ) {
			return $post->post_type;
		}
		elseif ( isset( $_GET['post_type'] ) ) {
			return sanitize_text_field( wp_unslash( $_GET['post_type'] ) );
		}

		return '';
	}

	/**
	 * Gets the type of the current page.
	 *
	 * @return string Returns 'post' if the current page is a post edit page. Taxonomy in other cases.
	 */
	public static function get_page_type() {
		global $pagenow;
		if ( WPSEO_Metabox::is_post_edit( $pagenow ) ) {
			return 'post';
		}

		return 'taxonomy';
	}

	/**
	 * Getter for the Adminl10n array. Applies the wpseo_admin_l10n filter.
	 *
	 * @return array The Adminl10n array.
	 */
	public static function get_admin_l10n() {
		$post_type = self::get_post_type();
		$page_type = self::get_page_type();

		$label_object = false;
		$no_index     = false;

		if ( $page_type === 'post' ) {
			$label_object = get_post_type_object( $post_type );
			$no_index     = WPSEO_Options::get( 'noindex-' . $post_type, false );
		}
		else {
			$label_object = WPSEO_Taxonomy::get_labels();

			$taxonomy_slug = filter_input( INPUT_GET, 'taxonomy', FILTER_DEFAULT, [ 'options' => [ 'default' => '' ] ] );
			$no_index      = WPSEO_Options::get( 'noindex-tax-' . $taxonomy_slug, false );
		}

		$wpseo_admin_l10n = [
			'displayAdvancedTab'    => WPSEO_Capability_Utils::current_user_can( 'wpseo_edit_advanced_metadata' ) || ! WPSEO_Options::get( 'disableadvanced_meta' ),
			'noIndex'               => (bool) $no_index,
			'isPostType'            => (bool) get_post_type(),
			'postType'              => get_post_type(),
			'postTypeNamePlural'    => ( $page_type === 'post' ) ? $label_object->label : $label_object->name,
			'postTypeNameSingular'  => ( $page_type === 'post' ) ? $label_object->labels->singular_name : $label_object->singular_name,
			'isBreadcrumbsDisabled' => WPSEO_Options::get( 'breadcrumbs-enable', false ) !== true && ! current_theme_supports( 'yoast-seo-breadcrumbs' ),
			// phpcs:ignore Generic.ControlStructures.DisallowYodaConditions -- Bug: squizlabs/PHP_CodeSniffer#2962.
			'isPrivateBlog'         => ( (string) get_option( 'blog_public' ) ) === '0',
		];

		$additional_entries = apply_filters( 'wpseo_admin_l10n', [] );
		if ( is_array( $additional_entries ) ) {
			$wpseo_admin_l10n = array_merge( $wpseo_admin_l10n, $additional_entries );
		}

		return $wpseo_admin_l10n;
	}

	/**
	 * Retrieves the analysis worker log level. Defaults to errors only.
	 *
	 * Uses bool YOAST_SEO_DEBUG as flag to enable logging. Off equals ERROR.
	 * Uses string YOAST_SEO_DEBUG_ANALYSIS_WORKER as log level for the Analysis
	 * Worker. Defaults to INFO.
	 * Can be: TRACE, DEBUG, INFO, WARN or ERROR.
	 *
	 * @return string The log level to use.
	 */
	public static function get_analysis_worker_log_level() {
		if ( defined( 'YOAST_SEO_DEBUG' ) && YOAST_SEO_DEBUG ) {
			return defined( 'YOAST_SEO_DEBUG_ANALYSIS_WORKER' ) ? YOAST_SEO_DEBUG_ANALYSIS_WORKER : 'INFO';
		}

		return 'ERROR';
	}

	/**
	 * Returns the unfiltered home URL.
	 *
	 * In case WPML is installed, returns the original home_url and not the WPML version.
	 * In case of a multisite setup we return the network_home_url.
	 *
	 * @return string The home url.
	 *
	 * @codeCoverageIgnore
	 */
	public static function get_home_url() {

		/**
		 * Action: 'wpseo_home_url' - Allows overriding of the home URL.
		 */
		do_action( 'wpseo_home_url' );

		// If the plugin is network-activated, use the network home URL.
		if ( self::is_plugin_network_active() ) {
			return network_home_url();
		}

		return home_url();
	}

	/**
	 * Prepares data for outputting as JSON.
	 *
	 * @param array $data The data to format.
	 *
	 * @return false|string The prepared JSON string.
	 */
	public static function format_json_encode( $data ) {
		$flags = JSON_UNESCAPED_SLASHES;

		if ( self::is_development_mode() ) {
			$flags = ( $flags | JSON_PRETTY_PRINT );

			/**
			 * Filter the Yoast SEO development mode.
			 *
			 * @api array $data Allows filtering of the JSON data for debug purposes.
			 */
			$data = apply_filters( 'wpseo_debug_json_data', $data );
		}

		// phpcs:ignore Yoast.Yoast.AlternativeFunctions.json_encode_wp_json_encodeWithAdditionalParams -- This is the definition of format_json_encode.
		return wp_json_encode( $data, $flags );
	}

	/**
	 * Extends the allowed post tags with accessibility-related attributes.
	 *
	 * @param array $allowed_post_tags The allowed post tags.
	 * @codeCoverageIgnore
	 *
	 * @return array The allowed tags including post tags, input tags and select tags.
	 */
	public static function extend_kses_post_with_a11y( $allowed_post_tags ) {
		static $a11y_tags;

		if ( isset( $a11y_tags ) === false ) {
			$a11y_tags = [
				'button'   => [
					'aria-expanded' => true,
					'aria-controls' => true,
				],
				'div'      => [
					'tabindex' => true,
				],
				// Below are attributes that are needed for backwards compatibility (WP < 5.1).
				'span'     => [
					'aria-hidden' => true,
				],
				'input'    => [
					'aria-describedby' => true,
				],
				'select'   => [
					'aria-describedby' => true,
				],
				'textarea' => [
					'aria-describedby' => true,
				],
			];

			// Add the global allowed attributes to each html element.
			$a11y_tags = array_map( '_wp_add_global_attributes', $a11y_tags );
		}

		return array_merge_recursive( $allowed_post_tags, $a11y_tags );
	}

	/**
	 * Extends the allowed post tags with input, select and option tags.
	 *
	 * @param array $allowed_post_tags The allowed post tags.
	 * @codeCoverageIgnore
	 *
	 * @return array The allowed tags including post tags, input tags, select tags and option tags.
	 */
	public static function extend_kses_post_with_forms( $allowed_post_tags ) {
		static $input_tags;

		if ( isset( $input_tags ) === false ) {
			$input_tags = [
				'input' => [
					'accept'          => true,
					'accesskey'       => true,
					'align'           => true,
					'alt'             => true,
					'autocomplete'    => true,
					'autofocus'       => true,
					'checked'         => true,
					'contenteditable' => true,
					'dirname'         => true,
					'disabled'        => true,
					'draggable'       => true,
					'dropzone'        => true,
					'form'            => true,
					'formaction'      => true,
					'formenctype'     => true,
					'formmethod'      => true,
					'formnovalidate'  => true,
					'formtarget'      => true,
					'height'          => true,
					'hidden'          => true,
					'lang'            => true,
					'list'            => true,
					'max'             => true,
					'maxlength'       => true,
					'min'             => true,
					'multiple'        => true,
					'name'            => true,
					'pattern'         => true,
					'placeholder'     => true,
					'readonly'        => true,
					'required'        => true,
					'size'            => true,
					'spellcheck'      => true,
					'src'             => true,
					'step'            => true,
					'tabindex'        => true,
					'translate'       => true,
					'type'            => true,
					'value'           => true,
					'width'           => true,

					/*
					 * Below are attributes that are needed for backwards compatibility (WP < 5.1).
					 * They are used for the social media image in the metabox.
					 * These can be removed once we move to the React versions of the social previews.
					 */
					'data-target'     => true,
					'data-target-id'  => true,
				],
				'select' => [
					'accesskey'       => true,
					'autofocus'       => true,
					'contenteditable' => true,
					'disabled'        => true,
					'draggable'       => true,
					'dropzone'        => true,
					'form'            => true,
					'hidden'          => true,
					'lang'            => true,
					'multiple'        => true,
					'name'            => true,
					'onblur'          => true,
					'onchange'        => true,
					'oncontextmenu'   => true,
					'onfocus'         => true,
					'oninput'         => true,
					'oninvalid'       => true,
					'onreset'         => true,
					'onsearch'        => true,
					'onselect'        => true,
					'onsubmit'        => true,
					'required'        => true,
					'size'            => true,
					'spellcheck'      => true,
					'tabindex'        => true,
					'translate'       => true,
				],
				'option' => [
					'class'    => true,
					'disabled' => true,
					'id'       => true,
					'label'    => true,
					'selected' => true,
					'value'    => true,
				],
			];

			// Add the global allowed attributes to each html element.
			$input_tags = array_map( '_wp_add_global_attributes', $input_tags );
		}

		return array_merge_recursive( $allowed_post_tags, $input_tags );
	}

	/**
	 * Gets an array of enabled features.
	 *
	 * @return string[] The array of enabled features.
	 */
	public static function retrieve_enabled_features() {
		$enabled_features = [];
		if ( defined( 'YOAST_SEO_ENABLED_FEATURES' ) ) {
			$enabled_features = preg_split( '/,\W*/', YOAST_SEO_ENABLED_FEATURES );
		}
		// Make the array of enabled features filterable, so features can be enabled at will.
		$enabled_features = apply_filters( 'wpseo_enable_feature', $enabled_features );

		return $enabled_features;
	}

	/* ********************* DEPRECATED METHODS ********************* */

	/**
	 * List all the available user roles.
	 *
	 * @since 1.8.0
	 * @deprecated 15.0
	 * @codeCoverageIgnore
	 *
	 * @return array $roles
	 */
	public static function get_roles() {
		_deprecated_function( __METHOD__, '15.0', 'wp_roles()->get_names()' );
		$wp_roles = wp_roles();

		$roles = $wp_roles->get_names();

		return $roles;
	}

	/**
	 * Checks if the current installation supports MyYoast access tokens.
	 *
	 * @codeCoverageIgnore
	 *
	 * @return bool True if access_tokens are supported.
	 *
	 * @deprecated 15.0
	 */
	public static function has_access_token_support() {
		_deprecated_function( __METHOD__, 'WPSEO 15.0' );
		return false;
	}

	/**
	 * Standardize whitespace in a string.
	 *
	 * Replace line breaks, carriage returns, tabs with a space, then remove double spaces.
	 *
	 * @deprecated 15.2
	 * @codeCoverageIgnore
	 *
	 * @since 1.8.0
	 *
	 * @param string $string String input to standardize.
	 *
	 * @return string
	 */
	public static function standardize_whitespace( $string ) {
		_deprecated_function( __METHOD__, 'WPSEO 15.2' );

		return YoastSEO()->helpers->string->standardize_whitespace( $string );
	}

	/**
	 * First strip out registered and enclosing shortcodes using native WordPress strip_shortcodes function.
	 * Then strip out the shortcodes with a filthy regex, because people don't properly register their shortcodes.
	 *
	 * @deprecated 15.2
	 * @codeCoverageIgnore
	 *
	 * @since 1.8.0
	 *
	 * @param string $text Input string that might contain shortcodes.
	 *
	 * @return string $text String without shortcodes.
	 */
	public static function strip_shortcode( $text ) {
		_deprecated_function( __METHOD__, 'WPSEO 15.2' );

		return YoastSEO()->helpers->string->strip_shortcode( $text );
	}

	/**
	 * Retrieves the title separator.
	 *
	 * @deprecated 15.2
	 * @codeCoverageIgnore
	 *
	 * @since 3.0.0
	 *
	 * @return string
	 */
	public static function get_title_separator() {
		_deprecated_function( __METHOD__, 'WPSEO 15.2', 'Yoast\WP\SEO\Helpers\Options_Helper::get_title_separator' );

		return YoastSEO()->helpers->options->get_title_separator();
	}

	/**
	 * Flush W3TC cache after successful update/add of taxonomy meta option.
	 *
	 * @deprecated 15.3
	 * @codeCoverageIgnore
	 *
	 * @since 1.8.0
	 */
	public static function flush_w3tc_cache() {
		_deprecated_function( __METHOD__, 'WPSEO 15.3' );
	}

	/**
	 * Determines whether or not WooCommerce is active.
	 *
	 * @deprecated 15.3
	 * @codeCoverageIgnore
	 *
	 * @return bool Whether or not WooCommerce is active.
	 */
	public static function is_woocommerce_active() {
		_deprecated_function( __METHOD__, 'WPSEO 15.3' );

		return YoastSEO()->helpers->woocommerce->is_active();
	}

	/**
	 * Outputs a Schema blob.
	 *
	 * @deprecated 15.5
	 * @codeCoverageIgnore
	 *
	 * @param array  $graph The Schema graph array to output.
	 * @param string $class The (optional) class to add to the script tag.
	 *
	 * @return bool
	 */
	public static function schema_output( $graph, $class = 'yoast-schema-graph' ) {
		_deprecated_function( __METHOD__, 'WPSEO 15.5' );

		if ( ! is_array( $graph ) || empty( $graph ) ) {
			return false;
		}

		// phpcs:ignore WordPress.Security.EscapeOutput -- Escaping happens in WPSEO_Utils::schema_tag, which should be whitelisted.
		echo self::schema_tag( $graph, $class );
		return true;
	}

	/**
	 * Returns a script tag with Schema blob.
	 *
	 * @deprecated 15.5
	 * @codeCoverageIgnore
	 *
	 * @param array  $graph The Schema graph array to output.
	 * @param string $class The (optional) class to add to the script tag.
	 *
	 * @return false|string A schema blob with script tags.
	 */
	public static function schema_tag( $graph, $class = 'yoast-schema-graph' ) {
		_deprecated_function( __METHOD__, 'WPSEO 15.5' );

		if ( ! is_array( $graph ) || empty( $graph ) ) {
			return false;
		}

		$output = [
			'@context' => 'https://schema.org',
			'@graph'   => $graph,
		];
		return "<script type='application/ld+json' class='" . esc_attr( $class ) . "'>" . self::format_json_encode( $output ) . '</script>' . "\n";
	}

	/**
	 * Returns the SVG for the traffic light in the metabox.
	 *
	 * @deprecated 15.5
	 * @codeCoverageIgnore
	 *
	 * @return string
	 */
	public static function traffic_light_svg() {
		_deprecated_function( __METHOD__, 'WPSEO 15.5' );

		return <<<'SVG'
<svg class="yst-traffic-light init" version="1.1" xmlns="http://www.w3.org/2000/svg"
	 role="img" aria-hidden="true" focusable="false"
	 x="0px" y="0px" viewBox="0 0 30 47" enable-background="new 0 0 30 47" xml:space="preserve">
<g id="BG_1_">
</g>
<g id="traffic_light">
	<g>
		<g>
			<g>
				<path fill="#5B2942" d="M22,0H8C3.6,0,0,3.6,0,7.9v31.1C0,43.4,3.6,47,8,47h14c4.4,0,8-3.6,8-7.9V7.9C30,3.6,26.4,0,22,0z
					 M27.5,38.8c0,3.1-2.6,5.7-5.8,5.7H8.3c-3.2,0-5.8-2.5-5.8-5.7V8.3c0-1.5,0.6-2.9,1.7-4c1.1-1,2.5-1.6,4.1-1.6h13.4
					c1.5,0,3,0.6,4.1,1.6c1.1,1.1,1.7,2.5,1.7,4V38.8z"/>
			</g>
			<g class="traffic-light-color traffic-light-red">
				<ellipse fill="#C8C8C8" cx="15" cy="23.5" rx="5.7" ry="5.6"/>
				<ellipse fill="#DC3232" cx="15" cy="10.9" rx="5.7" ry="5.6"/>
				<ellipse fill="#C8C8C8" cx="15" cy="36.1" rx="5.7" ry="5.6"/>
			</g>
			<g class="traffic-light-color traffic-light-orange">
				<ellipse fill="#F49A00" cx="15" cy="23.5" rx="5.7" ry="5.6"/>
				<ellipse fill="#C8C8C8" cx="15" cy="10.9" rx="5.7" ry="5.6"/>
				<ellipse fill="#C8C8C8" cx="15" cy="36.1" rx="5.7" ry="5.6"/>
			</g>
			<g class="traffic-light-color traffic-light-green">
				<ellipse fill="#C8C8C8" cx="15" cy="23.5" rx="5.7" ry="5.6"/>
				<ellipse fill="#C8C8C8" cx="15" cy="10.9" rx="5.7" ry="5.6"/>
				<ellipse fill="#63B22B" cx="15" cy="36.1" rx="5.7" ry="5.6"/>
			</g>
			<g class="traffic-light-color traffic-light-empty">
				<ellipse fill="#C8C8C8" cx="15" cy="23.5" rx="5.7" ry="5.6"/>
				<ellipse fill="#C8C8C8" cx="15" cy="10.9" rx="5.7" ry="5.6"/>
				<ellipse fill="#C8C8C8" cx="15" cy="36.1" rx="5.7" ry="5.6"/>
			</g>
			<g class="traffic-light-color traffic-light-init">
				<ellipse fill="#C8C8C8" cx="15" cy="23.5" rx="5.7" ry="5.6"/>
				<ellipse fill="#C8C8C8" cx="15" cy="10.9" rx="5.7" ry="5.6"/>
				<ellipse fill="#C8C8C8" cx="15" cy="36.1" rx="5.7" ry="5.6"/>
			</g>
		</g>
	</g>
</g>
</svg>
SVG;
	}

	/**
	 * Gets the plugin name from file.
	 *
	 * @deprecated 15.5
	 * @codeCoverageIgnore
	 *
	 * @since 2.3.3
	 *
	 * @param string $plugin Plugin path relative to plugins directory.
	 *
	 * @return string|bool
	 */
	public static function get_plugin_name( $plugin ) {
		_deprecated_function( __METHOD__, 'WPSEO 15.5' );

		$plugin_details = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin );

		if ( $plugin_details['Name'] !== '' ) {
			return $plugin_details['Name'];
		}

		return false;
	}

	/**
	 * Returns a base64 URL for the svg for use in the menu.
	 *
	 * @deprecated 15.5
	 * @codeCoverageIgnore
	 *
	 * @since 3.3.0
	 *
	 * @param bool $base64 Whether or not to return base64'd output.
	 *
	 * @return string
	 */
	public static function get_icon_svg( $base64 = true ) {
		_deprecated_function( __METHOD__, 'WPSEO 15.5' );

		$svg = '<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xml:space="preserve" width="100%" height="100%" style="fill:#82878c" viewBox="0 0 512 512" role="img" aria-hidden="true" focusable="false"><g><g><g><g><path d="M203.6,395c6.8-17.4,6.8-36.6,0-54l-79.4-204h70.9l47.7,149.4l74.8-207.6H116.4c-41.8,0-76,34.2-76,76V357c0,41.8,34.2,76,76,76H173C189,424.1,197.6,410.3,203.6,395z"/></g><g><path d="M471.6,154.8c0-41.8-34.2-76-76-76h-3L285.7,365c-9.6,26.7-19.4,49.3-30.3,68h216.2V154.8z"/></g></g><path stroke-width="2.974" stroke-miterlimit="10" d="M338,1.3l-93.3,259.1l-42.1-131.9h-89.1l83.8,215.2c6,15.5,6,32.5,0,48c-7.4,19-19,37.3-53,41.9l-7.2,1v76h8.3c81.7,0,118.9-57.2,149.6-142.9L431.6,1.3H338z M279.4,362c-32.9,92-67.6,128.7-125.7,131.8v-45c37.5-7.5,51.3-31,59.1-51.1c7.5-19.3,7.5-40.7,0-60l-75-192.7h52.8l53.3,166.8l105.9-294h58.1L279.4,362z"/></g></g></svg>';

		if ( $base64 ) {
			//phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode -- This encoding is intended.
			return 'data:image/svg+xml;base64,' . base64_encode( $svg );
		}

		return $svg;
	}

	/**
	 * Checks whether the current user is allowed to access the configuration.
	 *
	 * @deprecated 15.5
	 * @codeCoverageIgnore
	 *
	 * @since 1.8.0
	 *
	 * @return boolean
	 */
	public static function grant_access() {
		_deprecated_function( __METHOD__, 'WPSEO 15.5' );

		if ( ! is_multisite() ) {
			return true;
		}

		$options = get_site_option( 'wpseo_ms' );

		if ( empty( $options['access'] ) || $options['access'] === 'admin' ) {
			return current_user_can( 'wpseo_manage_options' );
		}

		return is_super_admin();
	}
}