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<?php |
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if ( ! defined( 'ABSPATH' ) ) { |
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die( 'You are not allowed to call this page directly.' ); |
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} |
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|
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/** |
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* Finds and caches the posts that embed a form, for the Embeds column on the forms list. |
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* |
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* Locating an embed means searching post_content for a shortcode that can sit anywhere in the |
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* content, so the LIKE patterns are unanchored and no index applies. Two things keep that |
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* affordable: one query serves every form on a list page, and the cache is only invalidated |
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* when a save actually changes which forms a post embeds. |
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* |
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* @since 6.35 |
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*/ |
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class FrmFormEmbedsHelper { |
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|
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/** |
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* The transient name that stores data for which posts a form is embedded in. |
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* |
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* @since 6.35 |
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* |
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* @var string |
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*/ |
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const TRANSIENT_NAME = 'frm_posts_contain_form'; |
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|
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/** |
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* Embed posts keyed by form ID, read from the transient once per request. |
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* |
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* @since 6.35 |
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* |
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* @var array|null |
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*/ |
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private static $cached_posts; |
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|
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/** |
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* Every post that embeds any Formidable form, queried once per request. |
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* |
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* @since 6.35 |
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* |
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* @var array|null |
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*/ |
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private static $candidate_posts; |
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|
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/** |
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* Every post ID that appears in the cache, flattened once per request. |
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* |
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* @since 6.35 |
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* |
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* @var array|null |
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*/ |
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private static $cached_post_ids; |
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|
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/** |
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* Expanded affected form IDs, keyed by the embedded form IDs they came from. |
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* |
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* @since 6.35 |
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* |
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* @var array<string,array<int>> |
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*/ |
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private static $affected_form_ids = array(); |
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|
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/** |
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* Reads the embed posts cache, hitting the transient only once per request. |
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* |
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* @since 6.35 |
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* |
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* @return array |
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*/ |
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public static function get_cached_posts() { |
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if ( null === self::$cached_posts ) { |
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$cached_posts = get_transient( self::TRANSIENT_NAME ); |
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self::$cached_posts = is_array( $cached_posts ) ? $cached_posts : array(); |
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} |
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|
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return self::$cached_posts; |
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} |
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|
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/** |
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* Saves the embed posts cache. |
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* |
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* @since 6.35 |
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* |
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* @param array $cached_posts Embed posts keyed by form ID. |
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* |
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* @return void |
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*/ |
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public static function save_cached_posts( $cached_posts ) { |
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self::$cached_posts = $cached_posts; |
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self::$cached_post_ids = null; |
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set_transient( self::TRANSIENT_NAME, $cached_posts, DAY_IN_SECONDS ); |
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} |
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|
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/** |
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* Matches the candidate posts against the search strings of several forms at once. |
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* |
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* @since 6.35 |
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* |
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* @param array $search_map Search strings keyed by form ID. |
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* |
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* @return array Posts keyed by form ID. |
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*/ |
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public static function match_candidate_posts( $search_map ) { |
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$matched = array_fill_keys( array_keys( $search_map ), array() ); |
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|
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foreach ( self::get_candidate_posts() as $candidate ) { |
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foreach ( $search_map as $form_id => $search_strings ) { |
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foreach ( $search_strings as $search_string ) { |
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if ( ! str_contains( $candidate->post_content, $search_string ) ) { |
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continue; |
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} |
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|
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$matched[ $form_id ][] = (object) array( |
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'ID' => $candidate->ID, |
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'post_title' => $candidate->post_title, |
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'post_name' => $candidate->post_name, |
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); |
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break; |
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} |
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} |
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} |
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|
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return $matched; |
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} |
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|
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/** |
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* Reduces posts to the fields the Embeds column actually renders, before they are cached. |
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* |
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* The frm_get_posts_contain_form filter is free to return whole WP_Post objects, and the |
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* Landing Pages add-on does. Caching those stores post_content and every other column, and |
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* because the column JSON encodes this straight into a data-posts attribute it also puts |
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* full post content, drafts included, into the admin page markup. |
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* |
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* @since 6.35 |
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* |
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* @param array $posts Posts that embed a form. |
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* |
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* @return \stdClass[] |
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*/ |
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public static function slim_posts( $posts ) { |
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/** |
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* Filters the post fields kept in the embeds cache. |
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* |
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* Anything rendered by the Embeds dropdown has to be listed here to survive caching. |
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* |
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* @since 6.35 |
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* |
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* @param string[] $fields Property names to keep. |
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*/ |
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$fields = apply_filters( |
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'frm_embed_post_cached_fields', |
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array( 'ID', 'post_title', 'post_name', 'title_contains_html', 'permalink', 'edit_link' ) |
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); |
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|
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$slim = array(); |
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|
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foreach ( $posts as $post ) { |
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if ( ! is_object( $post ) || ! isset( $post->ID ) ) { |
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continue; |
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} |
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|
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$kept = array(); |
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|
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foreach ( $fields as $field ) { |
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if ( property_exists( $post, $field ) ) { |
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$kept[ $field ] = $post->$field; |
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} |
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} |
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|
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$slim[] = (object) $kept; |
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} |
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|
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return $slim; |
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} |
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|
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/** |
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* Adds the links and fallback titles the Embeds dropdown expects. |
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* |
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* @since 6.35 |
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* |
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* @param array $posts Posts that embed a form. |
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* |
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* @return array |
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*/ |
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public static function prepare_posts( $posts ) { |
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$prepared = array(); |
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|
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foreach ( $posts as $post ) { |
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// Copied so the derived values never end up back in the cached original. |
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$display = clone $post; |
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|
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if ( ! property_exists( $display, 'permalink' ) ) { |
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$display->permalink = get_permalink( $display->ID ); |
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} |
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|
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if ( ! property_exists( $display, 'edit_link' ) ) { |
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$display->edit_link = get_edit_post_link( $display->ID ); |
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} |
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|
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// Ensure post_name is not null or the string "null" |
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if ( ! isset( $display->post_name ) ) { |
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$display->post_name = ''; |
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} |
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|
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// Ensure post_title is not null or the string "null" |
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if ( ! isset( $display->post_title ) ) { |
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$display->post_title = ''; |
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} |
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|
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if ( '' === $display->post_title ) { |
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$display->post_title = __( '(no title)', 'formidable' ); |
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} |
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|
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$prepared[] = $display; |
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}//end foreach |
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|
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return $prepared; |
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} |
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|
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/** |
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* Gets the substrings that mark a post as embedding some Formidable form. |
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* |
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* Every string returned by FrmFormsListHelper::get_search_strings_for_form() has to contain |
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* at least one of these, because they are what narrows wp_posts to a candidate set in one |
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* query rather than one query per form. |
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* |
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* @since 6.35 |
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* |
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* @return string[] |
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*/ |
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private static function get_needles() { |
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/** |
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* @since 6.35 |
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* |
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* @param string[] $needles |
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*/ |
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$needles = apply_filters( |
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'frm_embed_post_needles', |
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array( |
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'[formidable ', |
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'wp:formidable/simple-form', |
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) |
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); |
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|
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$strings = array(); |
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|
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foreach ( (array) $needles as $needle ) { |
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if ( is_string( $needle ) && '' !== $needle ) { |
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$strings[] = $needle; |
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} |
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} |
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|
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return $strings; |
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} |
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|
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/** |
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* Queries once for every post or page that embeds any Formidable form. |
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* |
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* @since 6.35 |
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* |
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* @return array |
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*/ |
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private static function get_candidate_posts() { |
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if ( null !== self::$candidate_posts ) { |
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return self::$candidate_posts; |
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} |
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|
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global $wpdb; |
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|
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$needles = self::get_needles(); |
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|
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if ( ! $needles ) { |
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self::$candidate_posts = array(); |
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return self::$candidate_posts; |
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} |
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|
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$like_where = implode( ' OR ', array_fill( 0, count( $needles ), 'post_content LIKE %s' ) ); |
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$args = array( $wpdb->posts, 'post', 'page', 'auto-draft', 'trash' ); |
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|
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foreach ( $needles as $needle ) { |
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$args[] = '%' . $wpdb->esc_like( $needle ) . '%'; |
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} |
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|
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$sql = 'SELECT ID, post_title, post_name, post_content FROM %i' |
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. ' WHERE post_type IN ( %s, %s )' |
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. ' AND post_status NOT IN ( %s, %s )' |
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. ' AND ( ' . $like_where . ' )'; |
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|
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// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared -- $like_where is built from a placeholder count, not from input. |
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$posts = $wpdb->get_results( $wpdb->prepare( $sql, $args ) ); |
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|
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self::$candidate_posts = is_array( $posts ) ? $posts : array(); |
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|
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return self::$candidate_posts; |
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} |
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|
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/** |
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* Maybe clear the cache when a post is inserted. |
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* |
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* Updates go through maybe_clear_on_update(), which can compare the content before and |
| 301 |
* after the change. |
| 302 |
* |
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* @since 6.35 |
| 304 |
* |
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* @param int $post_id Post ID. |
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* @param WP_Post $post Post object. |
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* @param bool $update True when an existing post was updated rather than created. |
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* |
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* @return void |
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*/ |
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public static function maybe_clear_on_insert( $post_id, $post, $update = false ) { |
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if ( $update || ! self::post_can_embed_form( $post ) ) { |
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return; |
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} |
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|
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// A post that has only just been created cannot be in the cache yet, so its own content |
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// is the only thing worth checking. Anything heavier here gets paid once per row by a |
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// bulk insert or an import. |
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if ( ! self::content_has_embed( $post->post_content ) ) { |
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return; |
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} |
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|
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self::clear_for_forms( self::get_affected_form_ids( self::get_embedded_form_ids( $post->post_content ) ) ); |
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} |
| 325 |
|
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/** |
| 327 |
* Maybe clear the cache when a post is updated. |
| 328 |
* |
| 329 |
* @since 6.35 |
| 330 |
* |
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* @param int $post_id Post ID. |
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* @param WP_Post $post_after Post object after the update. |
| 333 |
* @param WP_Post $post_before Post object before the update. |
| 334 |
* |
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* @return void |
| 336 |
*/ |
| 337 |
public static function maybe_clear_on_update( $post_id, $post_after, $post_before ) { |
| 338 |
if ( ! self::post_can_embed_form( $post_after ) && ! self::post_can_embed_form( $post_before ) ) { |
| 339 |
return; |
| 340 |
} |
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|
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$before_ids = self::get_embedded_form_ids( $post_before->post_content ); |
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$after_ids = self::get_embedded_form_ids( $post_after->post_content ); |
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$status_changed = $post_before->post_status !== $post_after->post_status; |
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$embeds_changed = $before_ids !== $after_ids; |
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|
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// The dropdown lists the title and slug, so renaming a post makes the cached copy wrong. |
| 348 |
$label_changed = $post_before->post_title !== $post_after->post_title || $post_before->post_name !== $post_after->post_name; |
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|
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$form_ids = array(); |
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|
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if ( $embeds_changed || $status_changed ) { |
| 353 |
// The forms this post embeds changed, or a status change moved the post in or out |
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// of the embeds query. |
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$form_ids = self::get_affected_form_ids( array_merge( $before_ids, $after_ids ) ); |
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} |
| 357 |
|
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$filter_added = ! $before_ids && ! $after_ids && $post_before->post_content !== $post_after->post_content; |
| 359 |
|
| 360 |
if ( $label_changed || $status_changed || $filter_added ) { |
| 361 |
// A post the frm_get_posts_contain_form filter added is listed even though its own |
| 362 |
// content does not say so, so fall back to whichever rows actually list it. |
| 363 |
$form_ids = array_merge( $form_ids, self::get_cached_form_ids_for_post( $post_id ) ); |
| 364 |
} |
| 365 |
|
| 366 |
self::clear_for_forms( $form_ids ); |
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} |
| 368 |
|
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/** |
| 370 |
* Maybe clear the cache when a post is trashed, untrashed or deleted. |
| 371 |
* |
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* @since 6.35 |
| 373 |
* |
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* @param int $post_id Post ID. |
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* @param WP_Post|null $post Post object, when the hook provides one. |
| 376 |
* |
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* @return void |
| 378 |
*/ |
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public static function maybe_clear_for_post( $post_id, $post = null ) { |
| 380 |
if ( ! is_object( $post ) ) { |
| 381 |
$post = get_post( $post_id ); |
| 382 |
} |
| 383 |
|
| 384 |
if ( ! is_object( $post ) || ! in_array( $post->post_type, array( 'post', 'page' ), true ) ) { |
| 385 |
return; |
| 386 |
} |
| 387 |
|
| 388 |
$form_ids = self::get_affected_form_ids( self::get_embedded_form_ids( $post->post_content ) ); |
| 389 |
|
| 390 |
self::clear_for_forms( array_merge( $form_ids, self::get_cached_form_ids_for_post( $post_id ) ) ); |
| 391 |
} |
| 392 |
|
| 393 |
/** |
| 394 |
* Checks if a post is one the embeds query would look at. |
| 395 |
* |
| 396 |
* Revisions, autosaves and auto-drafts all fire wp_insert_post, and an active site creates |
| 397 |
* them constantly. Letting those clear the cache would keep it permanently cold. |
| 398 |
* |
| 399 |
* @since 6.35 |
| 400 |
* |
| 401 |
* @param WP_Post $post Post object. |
| 402 |
* |
| 403 |
* @return bool |
| 404 |
*/ |
| 405 |
private static function post_can_embed_form( $post ) { |
| 406 |
if ( ! $post instanceof WP_Post ) { |
| 407 |
return false; |
| 408 |
} |
| 409 |
|
| 410 |
if ( ! in_array( $post->post_type, array( 'post', 'page' ), true ) ) { |
| 411 |
return false; |
| 412 |
} |
| 413 |
|
| 414 |
return 'auto-draft' !== $post->post_status; |
| 415 |
} |
| 416 |
|
| 417 |
/** |
| 418 |
* Checks whether post content embeds a Formidable form. |
| 419 |
* |
| 420 |
* Deliberately two string searches and nothing more. This runs on every post save on the |
| 421 |
* site, so it is the gate that keeps the parsing off the hot path. |
| 422 |
* |
| 423 |
* @since 6.35 |
| 424 |
* |
| 425 |
* @param string $content Post content. |
| 426 |
* |
| 427 |
* @return bool |
| 428 |
*/ |
| 429 |
private static function content_has_embed( $content ) { |
| 430 |
if ( ! is_string( $content ) ) { |
| 431 |
return false; |
| 432 |
} |
| 433 |
|
| 434 |
return str_contains( $content, '[formidable ' ) || str_contains( $content, '<!-- wp:formidable/simple-form ' ); |
| 435 |
} |
| 436 |
|
| 437 |
/** |
| 438 |
* Extracts the IDs of the forms embedded in post content. |
| 439 |
* |
| 440 |
* Only id= shortcodes and the simple-form block are recognised, matching what |
| 441 |
* FrmFormsListHelper::get_base_search_strings_for_form() looks for. A key= shortcode is |
| 442 |
* deliberately not matched, because the Embeds column cannot find it either. |
| 443 |
* |
| 444 |
* @since 6.35 |
| 445 |
* |
| 446 |
* @param string $content Post content. |
| 447 |
* |
| 448 |
* @return array Sorted, unique form IDs. |
| 449 |
*/ |
| 450 |
private static function get_embedded_form_ids( $content ) { |
| 451 |
if ( ! is_string( $content ) || '' === $content ) { |
| 452 |
return array(); |
| 453 |
} |
| 454 |
|
| 455 |
$ids = array(); |
| 456 |
$matches = array(); |
| 457 |
|
| 458 |
// [formidable id=5], [formidable key="contact-form"], and every quoting of both. |
| 459 |
preg_match_all( '/\[formidable\b[^\]]*\b(?:id|key)=["\']?([A-Za-z0-9_\-]+)/', $content, $matches ); |
| 460 |
|
| 461 |
if ( $matches[1] ) { |
| 462 |
$ids = $matches[1]; |
| 463 |
} |
| 464 |
|
| 465 |
$matches = array(); |
| 466 |
|
| 467 |
// <!-- wp:formidable/simple-form {"formId":"5" ... -->. |
| 468 |
preg_match_all( '/wp:formidable\/simple-form\s*\{[^}]*"formId":"?(\d+)/', $content, $matches ); |
| 469 |
|
| 470 |
if ( $matches[1] ) { |
| 471 |
$ids = array_merge( $ids, $matches[1] ); |
| 472 |
} |
| 473 |
|
| 474 |
$form_ids = array(); |
| 475 |
|
| 476 |
foreach ( $ids as $id ) { |
| 477 |
// A key in either attribute resolves to the same form the shortcode would render. |
| 478 |
$form_ids[] = is_numeric( $id ) ? intval( $id ) : FrmForm::get_id_by_key( $id ); |
| 479 |
} |
| 480 |
|
| 481 |
$form_ids = array_filter( $form_ids ); |
| 482 |
|
| 483 |
$form_ids = array_unique( $form_ids ); |
| 484 |
sort( $form_ids ); |
| 485 |
|
| 486 |
return $form_ids; |
| 487 |
} |
| 488 |
|
| 489 |
/** |
| 490 |
* Expands the forms embedded in a post to every form whose cached list they affect. |
| 491 |
* |
| 492 |
* A form's embeds list can be matched by a shortcode for a different form. Pro's nested |
| 493 |
* forms are the case that matters: FrmProFormsListHelper::get_search_strings_for_form() |
| 494 |
* makes form G's list match [formidable id=P] whenever form P embeds form G, so a change to |
| 495 |
* a post embedding P has to invalidate G too. |
| 496 |
* |
| 497 |
* @since 6.35 |
| 498 |
* |
| 499 |
* @param array $form_ids Form IDs embedded in the post content. |
| 500 |
* |
| 501 |
* @return array |
| 502 |
*/ |
| 503 |
private static function get_affected_form_ids( $form_ids ) { |
| 504 |
if ( ! $form_ids ) { |
| 505 |
return array(); |
| 506 |
} |
| 507 |
|
| 508 |
$ids = array(); |
| 509 |
|
| 510 |
foreach ( $form_ids as $form_id ) { |
| 511 |
$ids[] = intval( $form_id ); |
| 512 |
} |
| 513 |
|
| 514 |
$form_ids = array_unique( $ids ); |
| 515 |
sort( $form_ids ); |
| 516 |
|
| 517 |
$key = implode( ',', $form_ids ); |
| 518 |
|
| 519 |
if ( isset( self::$affected_form_ids[ $key ] ) ) { |
| 520 |
// Listeners hit the database to work this out, so a bulk import of pages embedding |
| 521 |
// the same form must not pay for it once per page. |
| 522 |
return self::$affected_form_ids[ $key ]; |
| 523 |
} |
| 524 |
|
| 525 |
/** |
| 526 |
* Filters the forms whose cached embeds list is affected by a post embedding $form_ids. |
| 527 |
* |
| 528 |
* Anything that widens get_search_strings_for_form() has to widen this to match, or the |
| 529 |
* forms it added will keep a stale count. |
| 530 |
* |
| 531 |
* @since 6.35 |
| 532 |
* |
| 533 |
* @param array $affected_form_ids Form IDs whose cached lists are affected. |
| 534 |
* @param array $form_ids Form IDs embedded in the post content. |
| 535 |
*/ |
| 536 |
$affected = apply_filters( 'frm_form_ids_affected_by_embed', $form_ids, $form_ids ); |
| 537 |
|
| 538 |
if ( ! is_array( $affected ) ) { |
| 539 |
$affected = $form_ids; |
| 540 |
} |
| 541 |
|
| 542 |
$expanded = array(); |
| 543 |
|
| 544 |
foreach ( $affected as $form_id ) { |
| 545 |
$expanded[] = intval( $form_id ); |
| 546 |
} |
| 547 |
|
| 548 |
$expanded = array_values( array_unique( $expanded ) ); |
| 549 |
|
| 550 |
self::$affected_form_ids[ $key ] = $expanded; |
| 551 |
|
| 552 |
return $expanded; |
| 553 |
} |
| 554 |
|
| 555 |
/** |
| 556 |
* Flattens the cache into a lookup of the post IDs it lists. |
| 557 |
* |
| 558 |
* Built once per request, so a bulk operation reads the cache once and then answers each |
| 559 |
* post with an array lookup instead of walking every form's post list every time. |
| 560 |
* |
| 561 |
* @since 6.35 |
| 562 |
* |
| 563 |
* @return array |
| 564 |
*/ |
| 565 |
private static function get_cached_post_ids() { |
| 566 |
if ( null !== self::$cached_post_ids ) { |
| 567 |
return self::$cached_post_ids; |
| 568 |
} |
| 569 |
|
| 570 |
self::$cached_post_ids = array(); |
| 571 |
|
| 572 |
foreach ( self::get_cached_posts() as $posts ) { |
| 573 |
if ( ! is_array( $posts ) ) { |
| 574 |
continue; |
| 575 |
} |
| 576 |
|
| 577 |
foreach ( $posts as $post_data ) { |
| 578 |
if ( isset( $post_data->ID ) ) { |
| 579 |
self::$cached_post_ids[ intval( $post_data->ID ) ] = true; |
| 580 |
} |
| 581 |
} |
| 582 |
} |
| 583 |
|
| 584 |
return self::$cached_post_ids; |
| 585 |
} |
| 586 |
|
| 587 |
/** |
| 588 |
* Gets the cached forms that currently list a post. |
| 589 |
* |
| 590 |
* @since 6.35 |
| 591 |
* |
| 592 |
* @param int $post_id Post ID. |
| 593 |
* |
| 594 |
* @return array |
| 595 |
*/ |
| 596 |
private static function get_cached_form_ids_for_post( $post_id ) { |
| 597 |
$post_id = intval( $post_id ); |
| 598 |
|
| 599 |
if ( ! isset( self::get_cached_post_ids()[ $post_id ] ) ) { |
| 600 |
// Answers the overwhelming majority of saves without walking the cache. |
| 601 |
return array(); |
| 602 |
} |
| 603 |
|
| 604 |
$form_ids = array(); |
| 605 |
|
| 606 |
foreach ( self::get_cached_posts() as $form_id => $posts ) { |
| 607 |
if ( ! is_array( $posts ) ) { |
| 608 |
continue; |
| 609 |
} |
| 610 |
|
| 611 |
foreach ( $posts as $post_data ) { |
| 612 |
if ( isset( $post_data->ID ) && intval( $post_data->ID ) === $post_id ) { |
| 613 |
$form_ids[] = intval( $form_id ); |
| 614 |
break; |
| 615 |
} |
| 616 |
} |
| 617 |
} |
| 618 |
|
| 619 |
return $form_ids; |
| 620 |
} |
| 621 |
|
| 622 |
/** |
| 623 |
* Drops the given forms from the cache and keeps everything else. |
| 624 |
* |
| 625 |
* At 100k posts a rebuild costs seconds, so keeping the forms that did not change is worth |
| 626 |
* far more than the cost of writing the map back. |
| 627 |
* |
| 628 |
* @since 6.35 |
| 629 |
* |
| 630 |
* @param array $form_ids Form IDs to drop. |
| 631 |
* |
| 632 |
* @return void |
| 633 |
*/ |
| 634 |
private static function clear_for_forms( $form_ids ) { |
| 635 |
if ( ! $form_ids ) { |
| 636 |
return; |
| 637 |
} |
| 638 |
|
| 639 |
if ( ! self::can_target_forms() ) { |
| 640 |
self::clear(); |
| 641 |
return; |
| 642 |
} |
| 643 |
|
| 644 |
$cached_posts = self::get_cached_posts(); |
| 645 |
|
| 646 |
if ( array() === $cached_posts ) { |
| 647 |
return; |
| 648 |
} |
| 649 |
|
| 650 |
$dropped = false; |
| 651 |
|
| 652 |
foreach ( $form_ids as $form_id ) { |
| 653 |
if ( ! array_key_exists( $form_id, $cached_posts ) ) { |
| 654 |
continue; |
| 655 |
} |
| 656 |
|
| 657 |
unset( $cached_posts[ $form_id ] ); |
| 658 |
$dropped = true; |
| 659 |
} |
| 660 |
|
| 661 |
if ( ! $dropped ) { |
| 662 |
// None of the affected forms are cached, so every cached count is still accurate. |
| 663 |
return; |
| 664 |
} |
| 665 |
|
| 666 |
if ( array() === $cached_posts ) { |
| 667 |
self::clear(); |
| 668 |
return; |
| 669 |
} |
| 670 |
|
| 671 |
self::save_cached_posts( $cached_posts ); |
| 672 |
} |
| 673 |
|
| 674 |
/** |
| 675 |
* Checks whether the affected forms can be worked out precisely. |
| 676 |
* |
| 677 |
* Pro widens get_search_strings_for_form() for nested forms. A Pro old enough not to hook |
| 678 |
* frm_form_ids_affected_by_embed cannot tell us which extra forms a post reaches, so on |
| 679 |
* those installs the whole cache is cleared rather than risk leaving a stale count. |
| 680 |
* |
| 681 |
* @since 6.35 |
| 682 |
* |
| 683 |
* @return bool |
| 684 |
*/ |
| 685 |
private static function can_target_forms() { |
| 686 |
if ( has_filter( 'frm_form_ids_affected_by_embed' ) ) { |
| 687 |
return true; |
| 688 |
} |
| 689 |
|
| 690 |
return ! FrmAppHelper::pro_is_installed(); |
| 691 |
} |
| 692 |
|
| 693 |
/** |
| 694 |
* Clears the embed posts cache. |
| 695 |
* |
| 696 |
* @since 6.35 |
| 697 |
* |
| 698 |
* @return void |
| 699 |
*/ |
| 700 |
private static function clear() { |
| 701 |
self::$cached_post_ids = array(); |
| 702 |
|
| 703 |
if ( array() === self::get_cached_posts() ) { |
| 704 |
// Nothing left to delete. Without this, a bulk insert of pages that embed a form |
| 705 |
// would run a delete query once per page. |
| 706 |
// |
| 707 |
// Reading the memoized copy rather than the transient is safe because |
| 708 |
// save_cached_posts() is the only thing that writes this key, and it refreshes the |
| 709 |
// memo. Pro and Landing delete the key on activation, which can only leave the memo |
| 710 |
// stale in the harmless direction: one redundant delete. |
| 711 |
return; |
| 712 |
} |
| 713 |
|
| 714 |
self::$cached_posts = array(); |
| 715 |
|
| 716 |
delete_transient( self::TRANSIENT_NAME ); |
| 717 |
} |
| 718 |
} |
| 719 |
|
