­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ delete_transient(); * $cache->delete_all_transient(); * $cache->delete_all_transient_from_db(); * * if ( false === ( $results = $cache->get_transient() ) ) { * // It wasn't there, so regenerate the data and save the transient * $results = 'GENERATED DATA'; * $cache->set_transient( $results ); * } * * * echo $results; * * print_r( Woo_Variation_Swatches_Cache::get_transients() ); */ if ( ! class_exists( 'Woo_Variation_Swatches_Cache' ) ) { class Woo_Variation_Swatches_Cache { private $name; private $group_name; public static $transients = array(); public function __construct( $name, $group_name ) { $this->name = $name; $this->group_name = $group_name; if ( empty( self::$transients[ $this->group_name ] ) ) { self::$transients[ $this->group_name ] = array( $this->name ); } else { self::$transients[ $this->group_name ][] = $this->name; } return $this; } public static function get_transients() { return self::$transients; } public static function delete_transient_group( $group ) { $transient_name = $group . '-transient-version'; $transient_value = (string) time(); set_transient( $transient_name, $transient_value ); return $transient_value; } public static function delete_cache_group( $group ) { $prefix_key = 'woo_variation_swatches_'; $prefix_string = $prefix_key . $group . '_cache_prefix'; wp_cache_set( $prefix_string, microtime(), $group ); } public function get_transient_version( $group ) { $transient_name = $group . '-transient-version'; $transient_value = get_transient( $transient_name ); if ( false === $transient_value ) { $transient_value = (string) time(); set_transient( $transient_name, $transient_value ); } return $transient_value; } // Transient Cache public function get_transient_group() { return $this->get_transient_version( $this->group_name ); } public function get_cache_prefix( $group ) { $prefix_key = 'woo_variation_swatches_'; // Get cache key - uses cache key {woo_variation_swatches_products_cache_prefix} to invalidate when needed. $prefix_string = $prefix_key . $group . '_cache_prefix'; $prefix = wp_cache_get( $prefix_string, $group ); if ( false === $prefix ) { $prefix = microtime(); wp_cache_set( $prefix_string, $prefix, $group ); } return $prefix_key . '_cache_' . $prefix . '_'; } public function get_transient_name() { return $this->name; } // the name should be 172 characters or less in length public function set_transient( $value, $expiration = 0 ) { $transient_version = $this->get_transient_group(); $transient_value = array( 'version' => $transient_version, 'value' => $value, ); return set_transient( $this->get_transient_name(), $transient_value, $expiration ); } public function get_transient( $transient = false ) { $transient_name = $transient ? $transient : $this->get_transient_name(); $transient_version = $this->get_transient_group(); $transient_value = get_transient( $transient_name ); if ( isset( $transient_value['value'], $transient_value['version'] ) && $transient_value['version'] === $transient_version ) { return $transient_value['value']; } return false; } public function delete_transient( $transient = false ) { $transient_name = $transient ? $transient : $this->get_transient_name(); return delete_transient( $transient_name ); } public function delete_all_transient( $transient_group = false ) { $group_name = $transient_group ? $transient_group : $this->group_name; self::delete_transient_group( $group_name ); } public function delete_all_transient_from_db( $transient_name = false, $transient_group = false ) { if ( ! wp_using_ext_object_cache() ) { global $wpdb; $name = sprintf( '_transient_%s', ( $transient_name ? $transient_name : $this->name ) ); $group = sprintf( '_transient_%s-transient-version', ( $transient_group ? $transient_group : $this->group_name ) ); // Delete Version $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->options WHERE option_name LIKE %s LIMIT %d;", $group, 100 ) ); // Delete Name $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->options WHERE option_name LIKE %s LIMIT %d;", $name, 10 ) ); } } // Object cache public function get_cache_key( $name = false ) { return $this->get_cache_prefix( $this->group_name ) . ( $name ? $name : $this->name ); } public function set_cache( $value, $name = false ) { $cache_key = $this->get_cache_key( $name ); wp_cache_set( $cache_key, $value, $this->group_name ); } public function get_cache( $cache_key = false ) { $cache_key = $cache_key ? $cache_key : $this->get_cache_key( $cache_key ); return wp_cache_get( $cache_key, $this->group_name ); } public function delete_cache( $cache_key = false ) { $cache_key = $cache_key ? $cache_key : $this->get_cache_key( $cache_key ); return wp_cache_delete( $cache_key, $this->group_name ); } public function delete_all_cache( $group_name = false ) { $group = $group_name ? $group_name : $this->group_name; $prefix_key = 'woo_variation_swatches_'; $prefix_string = $prefix_key . $group . '_cache_prefix'; wp_cache_set( $prefix_string, microtime(), $group ); } // Support WP 6.1 public function delete_group_cache( $group_name = false ) { $name = $group_name ? $group_name : $this->group_name; if ( ! wp_cache_supports( 'flush_group' ) ) { _doing_it_wrong( __FUNCTION__, esc_html__( 'Your object cache implementation does not support flushing individual groups.', 'default' ), '6.1.0' ); return false; } wp_cache_flush_group( $name ); } } }