100 lines
3.0 KiB
PHP
100 lines
3.0 KiB
PHP
<?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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* 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 = sanitize_text_field( $value );
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/**
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* Can be used to limit the length of front page meta description.
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*
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* @module seo-tools
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*
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* @since 4.4.0
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*
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* @param int Maximum length of front page meta description. Defaults to 300.
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*/
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$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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