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<?php |
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/** |
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* Object Cache related functionalities |
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* |
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* @package PoweredCache |
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*/ |
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|
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namespace PoweredCache; |
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|
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// Exit if accessed directly |
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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/** |
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* Class ObjectCache |
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*/ |
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class ObjectCache { |
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|
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/** |
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* Return an instance of the current class |
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* |
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* @return ObjectCache |
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* @since 1.0 |
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*/ |
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public static function factory() { |
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|
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static $instance; |
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|
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if ( ! $instance ) { |
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$instance = new self(); |
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$instance->setup(); |
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} |
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|
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return $instance; |
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} |
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|
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|
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/** |
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* Setup hooks |
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* |
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* @since 1.0 |
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*/ |
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public function setup() { |
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$settings = \PoweredCache\Utils\get_settings(); |
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|
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if ( 'off' === $settings['object_cache'] ) { |
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return; |
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} |
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|
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add_action( 'admin_bar_menu', array( $this, 'admin_bar_menu' ) ); |
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add_action( 'admin_post_powered_cache_purge_object_cache', array( $this, 'purge_object_cache' ) ); |
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|
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add_action( 'added_option', array( $this, 'maybe_clear_alloptions_cache' ) ); |
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add_action( 'updated_option', array( $this, 'maybe_clear_alloptions_cache' ) ); |
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add_action( 'deleted_option', array( $this, 'maybe_clear_alloptions_cache' ) ); |
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} |
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|
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|
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/** |
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* Add purge button on admin bar |
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* |
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* @param object $wp_admin_bar Admin bar object |
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* |
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* @since 1.0 |
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*/ |
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public function admin_bar_menu( $wp_admin_bar ) { |
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if ( is_multisite() && ! current_user_can( 'manage_network' ) ) { |
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return; |
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} |
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|
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if ( ! current_user_can( 'manage_options' ) ) { |
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return; |
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} |
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|
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$wp_admin_bar->add_menu( |
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array( |
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'id' => 'object-cache-purge', |
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'title' => __( 'Purge Object Cache', 'powered-cache' ), |
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'href' => wp_nonce_url( admin_url( 'admin-post.php?action=powered_cache_purge_object_cache' ), 'powered_cache_purge_object_cache' ), |
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'parent' => 'powered-cache', |
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) |
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); |
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} |
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|
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|
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/** |
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* Purge object cache |
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* |
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* @since 1.0 |
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*/ |
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public function purge_object_cache() { |
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$nonce = isset( $_GET['_wpnonce'] ) ? sanitize_text_field( wp_unslash( $_GET['_wpnonce'] ) ) : ''; |
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if ( ! wp_verify_nonce( $nonce, 'powered_cache_purge_object_cache' ) ) { |
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wp_nonce_ays( '' ); |
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} |
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|
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if ( is_multisite() && ! current_user_can( 'manage_network' ) ) { |
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$redirect_url = add_query_arg( 'pc_action', 'flush_object_cache_err_permission', wp_get_referer() ); |
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wp_safe_redirect( esc_url_raw( $redirect_url ) ); |
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exit; |
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} |
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|
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if ( ! current_user_can( 'manage_options' ) ) { |
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$redirect_url = add_query_arg( 'pc_action', 'flush_object_cache_err_permission', wp_get_referer() ); |
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wp_safe_redirect( esc_url_raw( $redirect_url ) ); |
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exit; |
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} |
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|
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if ( function_exists( 'wp_cache_flush' ) ) { |
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wp_cache_flush(); |
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} |
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|
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$redirect_url = add_query_arg( 'pc_action', 'flush_object_cache', wp_get_referer() ); |
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wp_safe_redirect( esc_url_raw( $redirect_url ) ); |
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exit; |
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} |
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|
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|
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/** |
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* Fix a race condition in alloptions caching |
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* |
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* @param string $option option name |
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* |
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* @see https://github.com/skopco/powered-cache/issues/47 |
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* @see https://core.trac.wordpress.org/ticket/31245 |
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* |
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* |
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* Ported from https://core.trac.wordpress.org/ticket/31245#comment:57 |
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* @since 1.2.4 |
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*/ |
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public function maybe_clear_alloptions_cache( $option ) { |
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if ( ! wp_installing() ) { |
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$alloptions = wp_load_alloptions(); // alloptions should be cached at this point |
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|
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if ( isset( $alloptions[ $option ] ) ) { // only if option is among alloptions |
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wp_cache_delete( 'alloptions', 'options' ); |
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} |
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} |
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} |
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|
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} |
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|
