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<?php |
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/** |
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* Class containing utility static methods that other SEO tools are relying on. |
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*/ |
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class Jetpack_SEO_Utils { |
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/** |
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* Site option name used to store front page meta description. |
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*/ |
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const FRONT_PAGE_META_OPTION = 'advanced_seo_front_page_description'; |
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/** |
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* Initially setting the front page meta description was for all sites, then the feature was grouped to a paid plan. |
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* The LEGACY_META_OPTION was added at that time to support legacy usage. Later on, a decision was made to have |
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* the JP seo-tools features for all JP sites (paid plan or not). |
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*/ |
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const LEGACY_META_OPTION = 'seo_meta_description'; |
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/** |
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* Used to check whether SEO tools are enabled for given site. |
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* |
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* @return bool True if SEO tools are enabled, false otherwise. |
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*/ |
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public static function is_enabled_jetpack_seo() { |
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/** |
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* Can be used by SEO plugin authors to disable the conflicting output of SEO Tools. |
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* |
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* @module seo-tools |
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* |
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* @since 5.0.0 |
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* |
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* @param bool True if SEO Tools should be disabled, false otherwise. |
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*/ |
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if ( apply_filters( 'jetpack_disable_seo_tools', false ) ) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Returns front page meta description for current site. |
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* |
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* @return string Front page meta description string or empty string. |
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*/ |
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public static function get_front_page_meta_description() { |
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$front_page_meta = get_option( self::FRONT_PAGE_META_OPTION ); |
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if ( empty( $front_page_meta ) ) { |
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$legacy_meta_option = get_option( self::LEGACY_META_OPTION ); |
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if ( ! empty( $legacy_meta_option ) ) { |
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return self::update_front_page_meta_description( $legacy_meta_option, true ); |
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} |
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} |
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return $front_page_meta; |
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} |
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/** |
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* Sanitizes the custom front page meta description input. |
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* |
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* @param string $value Front page meta string. |
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* |
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* @return string The sanitized string. |
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*/ |
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public static function sanitize_front_page_meta_description( $value ) { |
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return wp_strip_all_tags( $value ); |
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} |
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/** |
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* Updates the site option value for front page meta description. |
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* |
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* @param string $value New value for front page meta description. |
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* @param bool $delete_legacy_meta_option Delete the LEGACY_META_OPTION if true. |
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* |
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* @return string Saved value, or empty string if no update was performed. |
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*/ |
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public static function update_front_page_meta_description( $value, $delete_legacy_meta_option = false ) { |
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$front_page_description = self::sanitize_front_page_meta_description( $value ); |
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/** |
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* Can be used to limit the length of front page meta description. |
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* |
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* @module seo-tools |
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* |
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* @since 4.4.0 |
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* |
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* @param int Maximum length of front page meta description. Defaults to 300. |
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*/ |
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$description_max_length = apply_filters( 'jetpack_seo_front_page_description_max_length', 300 ); |
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if ( function_exists( 'mb_substr' ) ) { |
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$front_page_description = mb_substr( $front_page_description, 0, $description_max_length ); |
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} else { |
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$front_page_description = substr( $front_page_description, 0, $description_max_length ); |
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} |
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$did_update = update_option( self::FRONT_PAGE_META_OPTION, $front_page_description ); |
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if ( $delete_legacy_meta_option && $did_update ) { |
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delete_option( 'seo_meta_description' ); |
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} |
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if ( $did_update ) { |
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return $front_page_description; |
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} |
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return ''; |
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} |
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} |
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Automattic /
jetpack
