Changeset 41963 for trunk/src/wp-includes/option.php

Timestamp:

10/21/2017 01:21:24 PM (8 years ago)

Author:

dd32

Message:

Transients: Clear expired transients from the database in a daily cron task.

Fixes #41699

File:

• trunk/src/wp-includes/option.php (modified) (1 diff)

trunk/src/wp-includes/option.php

@@ -818 +818 @@
 
 /**
+ * Deletes all expired transients.
+ *
+ * The multi-table delete syntax is used to delete the transient record
+ * from table a, and the corresponding transient_timeout record from table b.                           +
+ *
+ * @since 4.9.0
+ *
+ * @param bool $force_db Optional. Force cleanup to run against the database even when an external object cache is used.
+ */
+function delete_expired_transients( $force_db = false) {
+    global $wpdb;
+
+    if ( ! $force_db && wp_using_ext_object_cache() ) {
+        return;
+    }
+
+    $wpdb->query( $wpdb->prepare(
+        "DELETE a, b FROM {$wpdb->options} a, {$wpdb->options} b
+            WHERE a.option_name LIKE %s
+            AND a.option_name NOT LIKE %s
+            AND b.option_name = CONCAT( '_transient_timeout_', SUBSTRING( a.option_name, 12 ) )
+            AND b.option_value < %d",
+        $wpdb->esc_like( '_transient_' ) . '%',
+        $wpdb->esc_like( '_transient_timeout_' ) . '%',
+        time()
+    ) );
+
+    if ( ! is_multisite() ) {
+        // non-Multisite stores site transients in the options table.
+        $wpdb->query( $wpdb->prepare(
+            "DELETE a, b FROM {$wpdb->options} a, {$wpdb->options} b
+                WHERE a.option_name LIKE %s
+                AND a.option_name NOT LIKE %s
+                AND b.option_name = CONCAT( '_site_transient_timeout_', SUBSTRING( a.option_name, 17 ) )
+                AND b.option_value < %d",
+            $wpdb->esc_like( '_site_transient_' ) . '%',
+            $wpdb->esc_like( '_site_transient_timeout_' ) . '%',
+            time()
+        ) );
+    } elseif ( is_multisite() && is_main_site() && is_main_network() ) {
+        // Multisite stores site transients in the sitemeta table.
+        $wpdb->query( $wpdb->prepare(
+            "DELETE a, b FROM {$wpdb->sitemeta} a, {$wpdb->sitemeta} b
+                WHERE a.meta_key LIKE %s
+                AND a.meta_key NOT LIKE %s
+                AND b.meta_key = CONCAT( '_site_transient_timeout_', SUBSTRING( a.meta_key, 17 ) )
+                AND b.meta_value < %d",
+            $wpdb->esc_like( '_site_transient_' ) . '%',
+            $wpdb->esc_like( '_site_transient_timeout_' ) . '%',
+            time()
+        ) );
+    }
+}
+
+/**
  * Saves and restores user interface settings stored in a cookie.
  *