Updates

wp-includes/cache.php

@@ -2,7 +2,7 @@
 /**
  * Object Cache API
  *
- * @link http://codex.wordpress.org/Function_Reference/WP_Cache
+ * @link https://codex.wordpress.org/Function_Reference/WP_Cache
  *
  * @package WordPress
  * @subpackage Cache
@@ -103,7 +103,7 @@ function wp_cache_flush() {
  * @param int|string $key What the contents in the cache are called
  * @param string $group Where the cache contents are grouped
  * @param bool $force Whether to force an update of the local cache from the persistent cache (default is false)
- * @param &bool $found Whether key was found in the cache. Disambiguates a return of false, a storable value.
+ * @param bool &$found Whether key was found in the cache. Disambiguates a return of false, a storable value.
  * @return bool|mixed False on failure to retrieve contents or the cache
  *		contents on success
  */
@@ -217,7 +217,6 @@ function wp_cache_add_global_groups( $groups ) {
  */
 function wp_cache_add_non_persistent_groups( $groups ) {
 	// Default cache doesn't persist so nothing to do here.
-	return;
 }
 
 /**
@@ -306,6 +305,15 @@ class WP_Object_Cache {
 	 */
 	private $blog_prefix;
 
+	/**
+	 * Holds the value of `is_multisite()`
+	 *
+	 * @var bool
+	 * @access private
+	 * @since 3.5.0
+	 */
+	private $multisite;
+
 	/**
 	 * Make private properties readable for backwards compatibility.
 	 *
@@ -664,6 +672,9 @@ class WP_Object_Cache {
 	 * @since 3.4.0
 	 *
 	 * @access protected
+	 * @param string $key
+	 * @param string $group
+	 * @return bool
 	 */
 	protected function _exists( $key, $group ) {
 		return isset( $this->cache[ $group ] ) && ( isset( $this->cache[ $group ][ $key ] ) || array_key_exists( $key, $this->cache[ $group ] ) );
@@ -673,7 +684,6 @@ class WP_Object_Cache {
 	 * Sets up object properties; PHP 5 style constructor
 	 *
 	 * @since 2.0.8
-	 * @return null|WP_Object_Cache If cache is disabled, returns null.
 	 */
 	public function __construct() {
 		global $blog_id;