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class-tielabs-wp-helper.php
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<?php /** * This file contains a bunch of helper functions that handle add caching to core WordPress functions. * */ defined( 'ABSPATH' ) || exit; // Exit if accessed directly if( ! class_exists( 'TIELABS_WP_HELPER' )){ class TIELABS_WP_HELPER { /** * Runs on class initialization. Adds filters and actions. */ function __construct() { // Properly clear get_term_by() cache when a term is updated add_action( 'edit_terms', array( $this, 'wp_flush_get_term_by_cache' ), 10, 2 ); // Properly clear get_term_by() cache when a term is updated add_action( 'edit_terms', array( $this, 'wp_flush_get_term_by_cache' ), 10, 2 ); // Properly clear term_exists() cache when a term is updated add_action( 'delete_term', array( $this, 'wp_flush_term_exists' ), 10, 4 ); // Flush the cache for published pages so we don't end up with stale data add_action( 'transition_post_status', array( $this, 'flush_get_page_by_path_cache' ), 10, 3 ); add_action( 'transition_post_status', array( $this, 'flush_get_page_by_title_cache' ), 10, 3 ); } /** * Cached version of get_term_by. * * Many calls to get_term_by (with name or slug lookup) across on a single pageload can easily add up the query count. * This function helps prevent that by adding a layer of caching. * * @param string $field Either 'slug', 'name', or 'id' * @param string|int $value Search for this term value * @param string $taxonomy Taxonomy Name * @param string $output Optional. Constant OBJECT, ARRAY_A, or ARRAY_N * @param string $filter Optional. Default is 'raw' or no WordPress defined filter will applied. * @return mixed|null|bool Term Row from database in the type specified by $filter. Will return false if $taxonomy does not exist or $term was not found. * @link http://vip.wordpress.com/documentation/uncached-functions/ Uncached Functions */ public static function get_term_by( $field, $value, $taxonomy, $output = OBJECT, $filter = 'raw' ){ // ID lookups are cached if ( 'id' == $field ) return get_term_by( $field, $value, $taxonomy, $output, $filter ); $cache_key = $field . '|' . $taxonomy . '|' . md5( $value ); $term_id = wp_cache_get( $cache_key, 'get_term_by' ); if ( false === $term_id ){ $term = get_term_by( $field, $value, $taxonomy ); if ( $term && ! is_wp_error( $term ) ) wp_cache_set( $cache_key, $term->term_id, 'get_term_by' ); else wp_cache_set( $cache_key, 0, 'get_term_by' ); // if we get an invalid value, let's cache it anyway } else { $term = get_term( $term_id, $taxonomy, $output, $filter ); } if ( is_wp_error( $term ) ) $term = false; return $term; } /** * Cached version of term_exists() * * Term exists calls can pile up on a single pageload. * This function adds a layer of caching to prevent lots of queries. * * @param int|string $term The term to check can be id, slug or name. * @param string $taxonomy The taxonomy name to use * @param int $parent Optional. ID of parent term under which to confine the exists search. * @return mixed Returns null if the term does not exist. Returns the term ID * if no taxonomy is specified and the term ID exists. Returns * an array of the term ID and the term taxonomy ID the taxonomy * is specified and the pairing exists. */ public static function term_exists( $term, $taxonomy = '', $parent = null ){ //If $parent is not null, let's skip the cache. if ( null !== $parent ){ return term_exists( $term, $taxonomy, $parent ); } if ( ! empty( $taxonomy ) ){ $cache_key = $term . '|' . $taxonomy; }else{ $cache_key = $term; } $cache_value = wp_cache_get( $cache_key, 'term_exists' ); //term_exists frequently returns null, but (happily) never false if ( false === $cache_value ){ $term_exists = term_exists( $term, $taxonomy ); wp_cache_set( $cache_key, $term_exists, 'term_exists' ); }else{ $term_exists = $cache_value; } if ( is_wp_error( $term_exists ) ) $term_exists = null; return $term_exists; } /** * Optimized version of get_term_link that adds caching for slug-based lookups. * * Returns permalink for a taxonomy term archive, or a WP_Error object if the term does not exist. * * @param int|string|object $term The term object / term ID / term slug whose link will be retrieved. * @param string $taxonomy The taxonomy slug. NOT required if you pass the term object in the first parameter * * @return string|WP_Error HTML link to taxonomy term archive on success, WP_Error if term does not exist. */ public static function get_term_link( $term, $taxonomy = null ){ // ID- or object-based lookups already result in cached lookups, so we can ignore those. if ( is_numeric( $term ) || is_object( $term ) ){ return get_term_link( $term, $taxonomy ); } $term_object = self::get_term_by( 'slug', $term, $taxonomy ); return get_term_link( $term_object ); } /** * Cached version of count_user_posts, which is uncached but doesn't always need to hit the db * * count_user_posts is generally fast, but it can be easy to end up with many redundant queries * if it's called several times per request. This allows bypassing the db queries in favor of * the cache */ public static function count_user_posts( $user_id ){ if ( ! is_numeric( $user_id ) ){ return 0; } $cache_key = 'vip_' . (int) $user_id; $cache_group = 'user_posts_count'; if ( false === ( $count = wp_cache_get( $cache_key, $cache_group ) ) ){ $count = count_user_posts( $user_id ); wp_cache_set( $cache_key, $count, $cache_group, 5 * MINUTE_IN_SECONDS ); } return $count; } /** * Properly clear get_term_by() cache when a term is updated */ function wp_flush_get_term_by_cache( $term_id, $taxonomy ){ $term = get_term_by( 'id', $term_id, $taxonomy ); if ( ! $term ){ return; } foreach( array( 'name', 'slug' ) as $field ){ $cache_key = $field . '|' . $taxonomy . '|' . md5( $term->$field ); $cache_group = 'get_term_by'; wp_cache_delete( $cache_key, $cache_group ); } } /** * Flush the cache for published pages so we don't end up with stale data * * @param string $new_status The post's new status * @param string $old_status The post's previous status * @param WP_Post $post The post * @link http://vip.wordpress.com/documentation/uncached-functions/ Uncached Functions */ function flush_get_page_by_title_cache( $new_status, $old_status, $post ){ if ( 'publish' == $new_status || 'publish' == $old_status ) wp_cache_delete( $post->post_type . '_' . sanitize_key( $post->post_title ), 'get_page_by_title' ); } /** * Flush the cache for published pages so we don't end up with stale data * * @param string $new_status The post's new status * @param string $old_status The post's previous status * @param WP_Post $post The post * * @link http://vip.wordpress.com/documentation/uncached-functions/ Uncached Functions */ function flush_get_page_by_path_cache( $new_status, $old_status, $post ){ if ( 'publish' === $new_status || 'publish' === $old_status ){ $page_path = get_page_uri( $post->ID ); wp_cache_delete( $post->post_type . '_' . sanitize_key( $page_path ), 'get_page_by_path' ); } } /** * Properly clear term_exists() cache when a term is updated */ function wp_flush_term_exists( $term, $tt_id, $taxonomy, $deleted_term ){ foreach( array( 'term_id', 'name', 'slug' ) as $field ){ $cache_key = $deleted_term->$field . '|' . $taxonomy ; $cache_group = 'term_exists'; wp_cache_delete( $cache_key, $cache_group ); } } } // Single instance. $TIELABS_WP_HELPER = new TIELABS_WP_HELPER(); }
/home/sudancam/.trash/jannah/./././framework/classes/class-tielabs-wp-helper.php