From bf0a8ca7ea0e372b5b4975d0224823f067b1fafa Mon Sep 17 00:00:00 2001
From: mustafauysal <m_uysl@hotmail.com>
Date: Sat, 2 May 2020 01:07:45 +0300
Subject: [PATCH 1/6] Ensure proper escaping around the stats method

---
 object-cache.php | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/object-cache.php b/object-cache.php
index 3700bcf..332f4ca 100644
--- a/object-cache.php
+++ b/object-cache.php
@@ -2,8 +2,8 @@
 /*
 Plugin Name: Memcached Redux
 Description: The real Memcached (not Memcache) backend for the WP Object Cache.
-Version: 0.1.6
-Plugin URI: http://wordpress.org/extend/plugins/memcached-redux/
+Version: 0.1.7
+Plugin URI: https://github.com/Ipstenu/memcached-redux
 Author: Scott Taylor - uses code from Ryan Boren, Denis de Bernardy, Matt Martz, Mike Schroder, Mika Epstein
 
 Install this file to wp-content/object-cache.php
@@ -387,15 +387,15 @@ function colorize_debug_line( $line ) {
 
 		$cmd = substr( $line, 0, strpos( $line, ' ' ) );
 
-		$cmd2 = "<span style='color:{$colors[$cmd]}'>$cmd</span>";
+		$cmd2 = "<span style='color:" . esc_attr( $colors[ $cmd ] ) . "'>" . esc_html( $cmd ) . "</span>";
 
-		return $cmd2 . substr( $line, strlen( $cmd ) ) . "\n";
+		return $cmd2 . esc_html( substr( $line, strlen( $cmd ) ) ) . "\n";
 	}
 
 	function stats() {
 		echo "<p>\n";
 		foreach ( $this->stats as $stat => $n ) {
-			echo "<strong>$stat</strong> $n";
+			echo "<strong>" . esc_html( $stat ) . "</strong> " . esc_html( $n );
 			echo "<br/>\n";
 		}
 		echo "</p>\n";
@@ -403,9 +403,8 @@ function stats() {
 		foreach ( $this->group_ops as $group => $ops ) {
 			if ( !isset( $_GET['debug_queries'] ) && 500 < count( $ops ) ) {
 				$ops = array_slice( $ops, 0, 500 );
-				echo "<big>Too many to show! <a href='" . add_query_arg( 'debug_queries', 'true' ) . "'>Show them anyway</a>.</big>\n";
-			}
-			echo "<h4>$group commands</h4>";
+				echo "<big>Too many to show! <a href='" . esc_url( add_query_arg( 'debug_queries', 'true' ) ) . "'>Show them anyway</a>.</big>\n";			}
+			echo "<h4>" . esc_html( $group ) . " commands</h4>";
 			echo "<pre>\n";
 			$lines = array();
 			foreach ( $ops as $op ) {

From 89edbd956d95af99020ce9e2ac8a507cb8965e78 Mon Sep 17 00:00:00 2001
From: Mustafa Uysal <m_uysl@hotmail.com>
Date: Thu, 6 Apr 2023 15:35:25 +0300
Subject: [PATCH 2/6] Update object-cache.php

Add *_multiple support
---
 object-cache.php | 862 ++++++++++++++++++++++++++++-------------------
 1 file changed, 509 insertions(+), 353 deletions(-)

diff --git a/object-cache.php b/object-cache.php
index 332f4ca..7eb7d72 100644
--- a/object-cache.php
+++ b/object-cache.php
@@ -2,7 +2,7 @@
 /*
 Plugin Name: Memcached Redux
 Description: The real Memcached (not Memcache) backend for the WP Object Cache.
-Version: 0.1.7
+Version: 0.1.8
 Plugin URI: https://github.com/Ipstenu/memcached-redux
 Author: Scott Taylor - uses code from Ryan Boren, Denis de Bernardy, Matt Martz, Mike Schroder, Mika Epstein
 
@@ -15,475 +15,631 @@
 
 if ( class_exists( 'Memcached' ) ):
 
-function wp_cache_add( $key, $data, $group = '', $expire = 0 ) {
-	global $wp_object_cache;
+	function wp_cache_add( $key, $data, $group = '', $expire = 0 ) {
+		global $wp_object_cache;
 
-	return $wp_object_cache->add( $key, $data, $group, $expire );
-}
-
-function wp_cache_incr( $key, $n = 1, $group = '' ) {
-	global $wp_object_cache;
-
-	return $wp_object_cache->incr( $key, $n, $group );
-}
+		return $wp_object_cache->add( $key, $data, $group, $expire );
+	}
 
-function wp_cache_decr( $key, $n = 1, $group = '' ) {
-	global $wp_object_cache;
+	function wp_cache_add_multiple( array $data, $group = '', $expire = 0 ) {
+		global $wp_object_cache;
 
-	return $wp_object_cache->decr( $key, $n, $group );
-}
+		return $wp_object_cache->add_multiple( $data, $group, $expire );
+	}
 
-function wp_cache_close() {
-	global $wp_object_cache;
+	function wp_cache_incr( $key, $n = 1, $group = '' ) {
+		global $wp_object_cache;
 
-	return $wp_object_cache->close();
-}
+		return $wp_object_cache->incr( $key, $n, $group );
+	}
 
-function wp_cache_delete( $key, $group = '' ) {
-	global $wp_object_cache;
+	function wp_cache_decr( $key, $n = 1, $group = '' ) {
+		global $wp_object_cache;
 
-	return $wp_object_cache->delete( $key, $group );
-}
+		return $wp_object_cache->decr( $key, $n, $group );
+	}
 
-function wp_cache_flush() {
-	global $wp_object_cache;
+	function wp_cache_close() {
+		global $wp_object_cache;
 
-	return $wp_object_cache->flush();
-}
+		return $wp_object_cache->close();
+	}
 
-function wp_cache_get( $key, $group = '', $force = false, &$found = null ) {
-	global $wp_object_cache;
+	function wp_cache_delete( $key, $group = '' ) {
+		global $wp_object_cache;
 
-	return $wp_object_cache->get( $key, $group, $force, $found );
-}
+		return $wp_object_cache->delete( $key, $group );
+	}
 
-/**
- * $keys_and_groups = array(
- *      array( 'key', 'group' ),
- *      array( 'key', '' ),
- *      array( 'key', 'group' ),
- *      array( 'key' )
- * );
- *
- */
-function wp_cache_get_multi( $key_and_groups, $bucket = 'default' ) {
-	global $wp_object_cache;
-
-	return $wp_object_cache->get_multi( $key_and_groups, $bucket );
-}
+	function wp_cache_delete_multiple( array $keys, $group = '' ) {
+		global $wp_object_cache;
 
-/**
- * $items = array(
- *      array( 'key', 'data', 'group' ),
- *      array( 'key', 'data' )
- * );
- *
- */
-function wp_cache_set_multi( $items, $expire = 0, $group = 'default' ) {
-	global $wp_object_cache;
-
-	return $wp_object_cache->set_multi( $items, $expire = 0, $group = 'default' );
-}
+		return $wp_object_cache->delete_multiple( $keys, $group );
+	}
 
-function wp_cache_init() {
-	global $wp_object_cache;
+	function wp_cache_flush() {
+		global $wp_object_cache;
 
-	$wp_object_cache = new WP_Object_Cache();
-}
+		return $wp_object_cache->flush();
+	}
 
-function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) {
-	global $wp_object_cache;
+	function wp_cache_get( $key, $group = '', $force = false, &$found = null ) {
+		global $wp_object_cache;
 
-	return $wp_object_cache->replace( $key, $data, $group, $expire );
-}
+		return $wp_object_cache->get( $key, $group, $force, $found );
+	}
 
-function wp_cache_set( $key, $data, $group = '', $expire = 0 ) {
-	global $wp_object_cache;
+	function wp_cache_get_multiple( $keys, $group = '' ) {
+		global $wp_object_cache;
 
-	if ( defined( 'WP_INSTALLING' ) == false )
-		return $wp_object_cache->set( $key, $data, $group, $expire );
-	else
-		return $wp_object_cache->delete( $key, $group );
-}
+		return $wp_object_cache->get_multiple( $keys, $group );
+	}
 
-function wp_cache_add_global_groups( $groups ) {
-	global $wp_object_cache;
+	/**
+	 * $keys_and_groups = array(
+	 *      array( 'key', 'group' ),
+	 *      array( 'key', '' ),
+	 *      array( 'key', 'group' ),
+	 *      array( 'key' )
+	 * );
+	 */
+	function wp_cache_get_multi( $key_and_groups, $bucket = 'default' ) {
+		global $wp_object_cache;
+
+		return $wp_object_cache->get_multi( $key_and_groups, $bucket );
+	}
 
-	$wp_object_cache->add_global_groups( $groups );
-}
+	function wp_cache_set_multiple( array $data, $group = '', $expire = 0 ) {
+		global $wp_object_cache;
 
-function wp_cache_add_non_persistent_groups( $groups ) {
-	global $wp_object_cache;
+		return $wp_object_cache->set_multiple( $data, $group, $expire );
+	}
 
-	$wp_object_cache->add_non_persistent_groups( $groups );
-}
+	/**
+	 * $items = array(
+	 *      array( 'key', 'data', 'group' ),
+	 *      array( 'key', 'data' )
+	 * );
+	 */
+	function wp_cache_set_multi( $items, $expire = 0, $group = 'default' ) {
+		global $wp_object_cache;
 
-class WP_Object_Cache {
-	var $global_groups = array();
+		return $wp_object_cache->set_multi( $items, $expire = 0, $group = 'default' );
+	}
 
-	var $no_mc_groups = array();
+	function wp_cache_init() {
+		global $wp_object_cache;
 
-	var $cache = array();
-	var $mc = array();
-	var $stats = array();
-	var $group_ops = array();
+		$wp_object_cache = new WP_Object_Cache();
+	}
 
-	var $cache_enabled = true;
-	var $default_expiration = 0;
+	function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) {
+		global $wp_object_cache;
 
-	function add( $id, $data, $group = 'default', $expire = 0 ) {
-		$key = $this->key( $id, $group );
+		return $wp_object_cache->replace( $key, $data, $group, $expire );
+	}
 
-		if ( is_object( $data ) )
-			$data = clone $data;
+	function wp_cache_set( $key, $data, $group = '', $expire = 0 ) {
+		global $wp_object_cache;
 
-		if ( in_array( $group, $this->no_mc_groups ) ) {
-			$this->cache[$key] = $data;
-			return true;
-		} elseif ( isset( $this->cache[$key] ) && $this->cache[$key] !== false ) {
-			return false;
+		if ( defined( 'WP_INSTALLING' ) == false ) {
+			return $wp_object_cache->set( $key, $data, $group, $expire );
+		} else {
+			return $wp_object_cache->delete( $key, $group );
 		}
+	}
 
-		$mc =& $this->get_mc( $group );
-		$expire = ( $expire == 0) ? $this->default_expiration : $expire;
-		$result = $mc->add( $key, $data, $expire );
-
-		if ( false !== $result ) {
-			++$this->stats['add'];
-			$this->group_ops[$group][] = "add $id";
-			$this->cache[$key] = $data;
-		}
+	function wp_cache_add_global_groups( $groups ) {
+		global $wp_object_cache;
 
-		return $result;
+		$wp_object_cache->add_global_groups( $groups );
 	}
 
-	function add_global_groups( $groups ) {
-		if ( ! is_array( $groups ) )
-			$groups = (array) $groups;
+	function wp_cache_add_non_persistent_groups( $groups ) {
+		global $wp_object_cache;
 
-		$this->global_groups = array_merge( $this->global_groups, $groups );
-		$this->global_groups = array_unique( $this->global_groups );
+		$wp_object_cache->add_non_persistent_groups( $groups );
 	}
 
-	function add_non_persistent_groups( $groups ) {
-		if ( ! is_array( $groups ) )
-			$groups = (array) $groups;
+	class WP_Object_Cache {
+		var $global_groups = array();
 
-		$this->no_mc_groups = array_merge( $this->no_mc_groups, $groups );
-		$this->no_mc_groups = array_unique( $this->no_mc_groups );
-	}
+		var $no_mc_groups = array();
 
-	function incr( $id, $n = 1, $group = 'default' ) {
-		$key = $this->key( $id, $group );
-		$mc =& $this->get_mc( $group );
-		$this->cache[ $key ] = $mc->increment( $key, $n );
-		return $this->cache[ $key ];
-	}
+		var $cache = array();
+		var $mc = array();
+		var $stats = array();
+		var $group_ops = array();
 
-	function decr( $id, $n = 1, $group = 'default' ) {
-		$key = $this->key( $id, $group );
-		$mc =& $this->get_mc( $group );
-		$this->cache[ $key ] = $mc->decrement( $key, $n );
-		return $this->cache[ $key ];
-	}
+		var $cache_enabled = true;
+		var $default_expiration = 0;
 
-	function close() {
-		// Silence is Golden.
-	}
+		function add( $id, $data, $group = 'default', $expire = 0 ) {
+			$key = $this->key( $id, $group );
 
-	function delete( $id, $group = 'default' ) {
-		$key = $this->key( $id, $group );
+			if ( is_object( $data ) ) {
+				$data = clone $data;
+			}
 
-		if ( in_array( $group, $this->no_mc_groups ) ) {
-			unset( $this->cache[$key] );
-			return true;
-		}
+			if ( in_array( $group, $this->no_mc_groups ) ) {
+				$this->cache[ $key ] = $data;
 
-		$mc =& $this->get_mc( $group );
+				return true;
+			} elseif ( isset( $this->cache[ $key ] ) && $this->cache[ $key ] !== false ) {
+				return false;
+			}
+
+			$mc     =& $this->get_mc( $group );
+			$expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
+			$result = $mc->add( $key, $data, $expire );
 
-		$result = $mc->delete( $key );
+			if ( false !== $result ) {
+				++ $this->stats['add'];
+				$this->group_ops[ $group ][] = "add $id";
+				$this->cache[ $key ]         = $data;
+			}
 
-		if ( false !== $result ) {
-			++$this->stats['delete'];
-			$this->group_ops[$group][] = "delete $id";
-			unset( $this->cache[$key] );
+			return $result;
 		}
 
-		return $result;
-	}
+		function add_global_groups( $groups ) {
+			if ( ! is_array( $groups ) ) {
+				$groups = (array) $groups;
+			}
 
-	function flush() {
-		// Don't flush if multi-blog.
-		if ( function_exists( 'is_site_admin' ) || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) )
-			return true;
+			$this->global_groups = array_merge( $this->global_groups, $groups );
+			$this->global_groups = array_unique( $this->global_groups );
+		}
 
-		$ret = true;
-		foreach ( array_keys( $this->mc ) as $group )
-			$ret &= $this->mc[$group]->flush();
-		return $ret;
-	}
+		public function add_multiple( array $data, $group = '', $expire = 0 ) {
+			$values = array();
 
-	function get( $id, $group = 'default', $force = false, &$found = null ) {
-		$key = $this->key( $id, $group );
-		$mc =& $this->get_mc( $group );
-		$found = false;
-
-		if ( isset( $this->cache[$key] ) && ( !$force || in_array( $group, $this->no_mc_groups ) ) ) {
-			$found = true;
-			if ( is_object( $this->cache[$key] ) )
-				$value = clone $this->cache[$key];
-			else
-				$value = $this->cache[$key];
-		} else if ( in_array( $group, $this->no_mc_groups ) ) {
-			$this->cache[$key] = $value = false;
-		} else {
-			$value = $mc->get( $key );
-			if ( empty( $value ) || ( is_integer( $value ) && -1 == $value ) ){
-				$value = false;
-				$found = $mc->getResultCode() !== Memcached::RES_NOTFOUND;
-			} else {
-				$found = true;
+			foreach ( $data as $key => $value ) {
+				$values[ $key ] = $this->add( $key, $value, $group, $expire );
 			}
-			$this->cache[$key] = $value;
+
+			return $values;
 		}
 
-		if ( $found ) {
-			++$this->stats['get'];
-			$this->group_ops[$group][] = "get $id";
-		} else {
-			++$this->stats['miss'];
+
+		function add_non_persistent_groups( $groups ) {
+			if ( ! is_array( $groups ) ) {
+				$groups = (array) $groups;
+			}
+
+			$this->no_mc_groups = array_merge( $this->no_mc_groups, $groups );
+			$this->no_mc_groups = array_unique( $this->no_mc_groups );
 		}
 
-		if ( 'checkthedatabaseplease' === $value ) {
-			unset( $this->cache[$key] );
-			$value = false;
+		function incr( $id, $n = 1, $group = 'default' ) {
+			$key                 = $this->key( $id, $group );
+			$mc                  =& $this->get_mc( $group );
+			$this->cache[ $key ] = $mc->increment( $key, $n );
+
+			return $this->cache[ $key ];
 		}
 
-		return $value;
-	}
+		function decr( $id, $n = 1, $group = 'default' ) {
+			$key                 = $this->key( $id, $group );
+			$mc                  =& $this->get_mc( $group );
+			$this->cache[ $key ] = $mc->decrement( $key, $n );
 
-	function get_multi( $keys, $group = 'default' ) {
-		$return = array();
-		$gets = array();
-		foreach ( $keys as $i => $values ) {
-			$mc =& $this->get_mc( $group );
-			$values = (array) $values;
-			if ( empty( $values[1] ) )
-				$values[1] = 'default';
+			return $this->cache[ $key ];
+		}
 
-			list( $id, $group ) = (array) $values;
+		function close() {
+			// Silence is Golden.
+		}
+
+		function delete( $id, $group = 'default' ) {
 			$key = $this->key( $id, $group );
 
-			if ( isset( $this->cache[$key] ) ) {
+			if ( in_array( $group, $this->no_mc_groups ) ) {
+				unset( $this->cache[ $key ] );
 
-				if ( is_object( $this->cache[$key] ) )
-					$return[$key] = clone $this->cache[$key];
-				else
-					$return[$key] = $this->cache[$key];
+				return true;
+			}
 
-			} else if ( in_array( $group, $this->no_mc_groups ) ) {
-				$return[$key] = false;
+			$mc =& $this->get_mc( $group );
 
-			} else {
-				$gets[$key] = $key;
+			$result = $mc->delete( $key );
+
+			if ( false !== $result ) {
+				++ $this->stats['delete'];
+				$this->group_ops[ $group ][] = "delete $id";
+				unset( $this->cache[ $key ] );
 			}
+
+			return $result;
 		}
 
-		if ( !empty( $gets ) ) {
-			$results = $mc->getMulti( $gets, $null, Memcached::GET_PRESERVE_ORDER );
-			$joined = array_combine( array_keys( $gets ), array_values( $results ) );
-			$return = array_merge( $return, $joined );
+		public function delete_multiple( array $keys, $group = '' ) {
+			$values = array();
+
+			foreach ( $keys as $key ) {
+				$values[ $key ] = $this->delete( $key, $group );
+			}
+
+			return $values;
 		}
 
-		++$this->stats['get_multi'];
-		$this->group_ops[$group][] = "get_multi $id";
-		$this->cache = array_merge( $this->cache, $return );
-		return array_values( $return );
-	}
+		function flush() {
+			// Don't flush if multi-blog.
+			if ( function_exists( 'is_site_admin' ) || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) ) {
+				return true;
+			}
+
+			$ret = true;
+			foreach ( array_keys( $this->mc ) as $group ) {
+				$ret &= $this->mc[ $group ]->flush();
+			}
 
-	function key( $key, $group ) {
-		if ( empty( $group ) )
-			$group = 'default';
+			return $ret;
+		}
 
-		if ( false !== array_search( $group, $this->global_groups ) )
-			$prefix = $this->global_prefix;
-		else
-			$prefix = $this->blog_prefix;
+		function get( $id, $group = 'default', $force = false, &$found = null ) {
+			$key   = $this->key( $id, $group );
+			$mc    =& $this->get_mc( $group );
+			$found = false;
 
-		return preg_replace( '/\s+/', '', WP_CACHE_KEY_SALT . "$prefix$group:$key" );
-	}
+			if ( isset( $this->cache[ $key ] ) && ( ! $force || in_array( $group, $this->no_mc_groups ) ) ) {
+				$found = true;
+				if ( is_object( $this->cache[ $key ] ) ) {
+					$value = clone $this->cache[ $key ];
+				} else {
+					$value = $this->cache[ $key ];
+				}
+			} else if ( in_array( $group, $this->no_mc_groups ) ) {
+				$this->cache[ $key ] = $value = false;
+			} else {
+				$value = $mc->get( $key );
+				if ( empty( $value ) || ( is_integer( $value ) && - 1 == $value ) ) {
+					$value = false;
+					$found = $mc->getResultCode() !== Memcached::RES_NOTFOUND;
+				} else {
+					$found = true;
+				}
+				$this->cache[ $key ] = $value;
+			}
+
+			if ( $found ) {
+				++ $this->stats['get'];
+				$this->group_ops[ $group ][] = "get $id";
+			} else {
+				++ $this->stats['miss'];
+			}
+
+			if ( 'checkthedatabaseplease' === $value ) {
+				unset( $this->cache[ $key ] );
+				$value = false;
+			}
 
-	function replace( $id, $data, $group = 'default', $expire = 0 ) {
-		$key = $this->key( $id, $group );
-		$expire = ( $expire == 0) ? $this->default_expiration : $expire;
-		$mc =& $this->get_mc( $group );
+			return $value;
+		}
 
-		if ( is_object( $data ) )
-			$data = clone $data;
+		public function get_multiple( $keys, $group = 'default' ) {
+			$return = array();
+			$gets   = array();
+			foreach ( $keys as $i => $values ) {
+				$mc     =& $this->get_mc( $group );
+				$values = (array) $values;
+				if ( empty( $values[1] ) ) {
+					$values[1] = 'default';
+				}
+
+				list( $id, $group ) = (array) $values;
+				$key = $this->key( $id, $group );
+
+				if ( isset( $this->cache[ $key ] ) ) {
+
+					if ( is_object( $this->cache[ $key ] ) ) {
+						$return[ $key ] = clone $this->cache[ $key ];
+					} else {
+						$return[ $key ] = $this->cache[ $key ];
+					}
+
+				} else if ( in_array( $group, $this->no_mc_groups ) ) {
+					$return[ $key ] = false;
+
+				} else {
+					$gets[ $key ] = $key;
+				}
+			}
 
-		$result = $mc->replace( $key, $data, $expire );
-		if ( false !== $result )
-			$this->cache[$key] = $data;
-		return $result;
-	}
+			if ( ! empty( $gets ) ) {
+				$results = $mc->getMulti( $gets, $null, Memcached::GET_PRESERVE_ORDER );
+				$joined  = array_combine( array_keys( $gets ), array_values( $results ) );
+				$return  = array_merge( $return, $joined );
+			}
 
-	function set( $id, $data, $group = 'default', $expire = 0 ) {
-		$key = $this->key( $id, $group );
-		if ( isset( $this->cache[$key] ) && ( 'checkthedatabaseplease' === $this->cache[$key] ) )
-			return false;
+			++ $this->stats['get_multi'];
+			$this->group_ops[ $group ][] = "get_multi $id";
+			$this->cache                 = array_merge( $this->cache, $return );
 
-		if ( is_object( $data) )
-			$data = clone $data;
+			return array_values( $return );
+		}
 
-		$this->cache[$key] = $data;
+		function get_multi( $keys, $group = 'default' ) {
+			$return = array();
+			$gets   = array();
+			foreach ( $keys as $i => $values ) {
+				$mc     =& $this->get_mc( $group );
+				$values = (array) $values;
+				if ( empty( $values[1] ) ) {
+					$values[1] = 'default';
+				}
+
+				list( $id, $group ) = (array) $values;
+				$key = $this->key( $id, $group );
+
+				if ( isset( $this->cache[ $key ] ) ) {
+
+					if ( is_object( $this->cache[ $key ] ) ) {
+						$return[ $key ] = clone $this->cache[ $key ];
+					} else {
+						$return[ $key ] = $this->cache[ $key ];
+					}
+
+				} else if ( in_array( $group, $this->no_mc_groups ) ) {
+					$return[ $key ] = false;
+
+				} else {
+					$gets[ $key ] = $key;
+				}
+			}
 
-		if ( in_array( $group, $this->no_mc_groups ) )
-			return true;
+			if ( ! empty( $gets ) ) {
+				$results = $mc->getMulti( $gets, $null, Memcached::GET_PRESERVE_ORDER );
+				$joined  = array_combine( array_keys( $gets ), array_values( $results ) );
+				$return  = array_merge( $return, $joined );
+			}
 
-		$expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
-		$mc =& $this->get_mc( $group );
-		$result = $mc->set( $key, $data, $expire );
+			++ $this->stats['get_multi'];
+			$this->group_ops[ $group ][] = "get_multi $id";
+			$this->cache                 = array_merge( $this->cache, $return );
 
-		return $result;
-	}
+			return array_values( $return );
+		}
+
+		function key( $key, $group ) {
+			if ( empty( $group ) ) {
+				$group = 'default';
+			}
+
+			if ( false !== array_search( $group, $this->global_groups ) ) {
+				$prefix = $this->global_prefix;
+			} else {
+				$prefix = $this->blog_prefix;
+			}
+
+			return preg_replace( '/\s+/', '', WP_CACHE_KEY_SALT . "$prefix$group:$key" );
+		}
 
-	function set_multi( $items, $expire = 0, $group = 'default' ) {
-		$sets = array();
-		$mc =& $this->get_mc( $group );
-		$expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
+		function replace( $id, $data, $group = 'default', $expire = 0 ) {
+			$key    = $this->key( $id, $group );
+			$expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
+			$mc     =& $this->get_mc( $group );
+
+			if ( is_object( $data ) ) {
+				$data = clone $data;
+			}
 
-		foreach ( $items as $i => $item ) {
-			if ( empty( $item[2] ) )
-				$item[2] = 'default';
+			$result = $mc->replace( $key, $data, $expire );
+			if ( false !== $result ) {
+				$this->cache[ $key ] = $data;
+			}
 
-			list( $id, $data, $group ) = $item;
+			return $result;
+		}
 
+		function set( $id, $data, $group = 'default', $expire = 0 ) {
 			$key = $this->key( $id, $group );
-			if ( isset( $this->cache[$key] ) && ( 'checkthedatabaseplease' === $this->cache[$key] ) )
-				continue;
+			if ( isset( $this->cache[ $key ] ) && ( 'checkthedatabaseplease' === $this->cache[ $key ] ) ) {
+				return false;
+			}
 
-			if ( is_object( $data) )
+			if ( is_object( $data ) ) {
 				$data = clone $data;
+			}
 
-			$this->cache[$key] = $data;
+			$this->cache[ $key ] = $data;
 
-			if ( in_array( $group, $this->no_mc_groups ) )
-				continue;
+			if ( in_array( $group, $this->no_mc_groups ) ) {
+				return true;
+			}
+
+			$expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
+			$mc     =& $this->get_mc( $group );
+			$result = $mc->set( $key, $data, $expire );
 
-			$sets[$key] = $data;
+			return $result;
 		}
 
-		if ( !empty( $sets ) )
-			$mc->setMulti( $sets, $expire );
-	}
+		function set_multiple( $items, $group = 'default', $expire = 0 ) {
+			$sets   = array();
+			$mc     =& $this->get_mc( $group );
+			$expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
 
-	function colorize_debug_line( $line ) {
-		$colors = array(
-			'get'   => 'green',
-			'set'   => 'purple',
-			'add'   => 'blue',
-			'delete'=> 'red'
-		);
+			foreach ( $items as $i => $item ) {
+				if ( empty( $item[2] ) ) {
+					$item[2] = 'default';
+				}
 
-		$cmd = substr( $line, 0, strpos( $line, ' ' ) );
+				list( $id, $data, $group ) = $item;
 
-		$cmd2 = "<span style='color:" . esc_attr( $colors[ $cmd ] ) . "'>" . esc_html( $cmd ) . "</span>";
+				$key = $this->key( $id, $group );
+				if ( isset( $this->cache[ $key ] ) && ( 'checkthedatabaseplease' === $this->cache[ $key ] ) ) {
+					continue;
+				}
 
-		return $cmd2 . esc_html( substr( $line, strlen( $cmd ) ) ) . "\n";
-	}
+				if ( is_object( $data ) ) {
+					$data = clone $data;
+				}
+
+				$this->cache[ $key ] = $data;
 
-	function stats() {
-		echo "<p>\n";
-		foreach ( $this->stats as $stat => $n ) {
-			echo "<strong>" . esc_html( $stat ) . "</strong> " . esc_html( $n );
-			echo "<br/>\n";
+				if ( in_array( $group, $this->no_mc_groups ) ) {
+					continue;
+				}
+
+				$sets[ $key ] = $data;
+			}
+
+			if ( ! empty( $sets ) ) {
+				$mc->setMulti( $sets, $expire );
+			}
 		}
-		echo "</p>\n";
-		echo "<h3>Memcached:</h3>";
-		foreach ( $this->group_ops as $group => $ops ) {
-			if ( !isset( $_GET['debug_queries'] ) && 500 < count( $ops ) ) {
-				$ops = array_slice( $ops, 0, 500 );
-				echo "<big>Too many to show! <a href='" . esc_url( add_query_arg( 'debug_queries', 'true' ) ) . "'>Show them anyway</a>.</big>\n";			}
-			echo "<h4>" . esc_html( $group ) . " commands</h4>";
-			echo "<pre>\n";
-			$lines = array();
-			foreach ( $ops as $op ) {
-				$lines[] = $this->colorize_debug_line( $op );
-			}
-			print_r( $lines );
-			echo "</pre>\n";
+
+		function set_multi( $items, $expire = 0, $group = 'default' ) {
+			$sets   = array();
+			$mc     =& $this->get_mc( $group );
+			$expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
+
+			foreach ( $items as $i => $item ) {
+				if ( empty( $item[2] ) ) {
+					$item[2] = 'default';
+				}
+
+				list( $id, $data, $group ) = $item;
+
+				$key = $this->key( $id, $group );
+				if ( isset( $this->cache[ $key ] ) && ( 'checkthedatabaseplease' === $this->cache[ $key ] ) ) {
+					continue;
+				}
+
+				if ( is_object( $data ) ) {
+					$data = clone $data;
+				}
+
+				$this->cache[ $key ] = $data;
+
+				if ( in_array( $group, $this->no_mc_groups ) ) {
+					continue;
+				}
+
+				$sets[ $key ] = $data;
+			}
+
+			if ( ! empty( $sets ) ) {
+				$mc->setMulti( $sets, $expire );
+			}
 		}
 
-		if ( !empty( $this->debug ) && $this->debug )
-			var_dump( $this->memcache_debug );
-	}
+		function colorize_debug_line( $line ) {
+			$colors = array(
+				'get'    => 'green',
+				'set'    => 'purple',
+				'add'    => 'blue',
+				'delete' => 'red'
+			);
 
-	function &get_mc( $group ) {
-		if ( isset( $this->mc[$group] ) )
-			return $this->mc[$group];
-		return $this->mc['default'];
-	}
+			$cmd = substr( $line, 0, strpos( $line, ' ' ) );
+
+			$cmd2 = "<span style='color:" . esc_attr( $colors[ $cmd ] ) . "'>" . esc_html( $cmd ) . "</span>";
+
+			return $cmd2 . esc_html( substr( $line, strlen( $cmd ) ) ) . "\n";
+		}
 
-	function __construct() {
-
-		$this->stats = array(
-			'get'        => 0,
-			'get_multi'  => 0,
-			'add'        => 0,
-			'set'        => 0,
-			'delete'     => 0,
-			'miss'       => 0,
-		);
-		
-		global $memcached_servers;
-
-		if ( isset( $memcached_servers ) )
-			$buckets = $memcached_servers;
-		else
-			$buckets = array( '127.0.0.1' );
-
-		reset( $buckets );
-		if ( is_int( key( $buckets ) ) )
-			$buckets = array( 'default' => $buckets );
-
-		foreach ( $buckets as $bucket => $servers ) {
-			$this->mc[$bucket] = new Memcached();
-
-			$instances = array();
-			foreach ( $servers as $server ) {
-				@list( $node, $port ) = explode( ':', $server );
-				if ( empty( $port ) )
-					$port = ini_get( 'memcache.default_port' );
-				$port = intval( $port );
-				if ( !$port )
-					$port = 11211;
-
-				$instances[] = array( $node, $port, 1 );
-			}
-			$this->mc[$bucket]->addServers( $instances );
+		function stats() {
+			echo "<p>\n";
+			foreach ( $this->stats as $stat => $n ) {
+				echo "<strong>" . esc_html( $stat ) . "</strong> " . esc_html( $n );
+				echo "<br/>\n";
+			}
+			echo "</p>\n";
+			echo "<h3>Memcached:</h3>";
+			foreach ( $this->group_ops as $group => $ops ) {
+				if ( ! isset( $_GET['debug_queries'] ) && 500 < count( $ops ) ) {
+					$ops = array_slice( $ops, 0, 500 );
+					echo "<big>Too many to show! <a href='" . esc_url( add_query_arg( 'debug_queries', 'true' ) ) . "'>Show them anyway</a>.</big>\n";
+				}
+				echo "<h4>" . esc_html( $group ) . " commands</h4>";
+				echo "<pre>\n";
+				$lines = array();
+				foreach ( $ops as $op ) {
+					$lines[] = $this->colorize_debug_line( $op );
+				}
+				print_r( $lines );
+				echo "</pre>\n";
+			}
+
+			if ( ! empty( $this->debug ) && $this->debug ) {
+				var_dump( $this->memcache_debug );
+			}
 		}
 
-		global $blog_id, $table_prefix;
-		$this->global_prefix = '';
-		$this->blog_prefix = '';
-		if ( function_exists( 'is_multisite' ) ) {
-			$this->global_prefix = ( is_multisite() || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) ) ? '' : $table_prefix;
-			$this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ) . ':';
+		function &get_mc( $group ) {
+			if ( isset( $this->mc[ $group ] ) ) {
+				return $this->mc[ $group ];
+			}
+
+			return $this->mc['default'];
 		}
 
-		$this->cache_hits =& $this->stats['get'];
-		$this->cache_misses =& $this->stats['miss'];
+		function __construct() {
+
+			$this->stats = array(
+				'get'       => 0,
+				'get_multi' => 0,
+				'add'       => 0,
+				'set'       => 0,
+				'delete'    => 0,
+				'miss'      => 0,
+			);
+
+			global $memcached_servers;
+
+			if ( isset( $memcached_servers ) ) {
+				$buckets = $memcached_servers;
+			} else {
+				$buckets = array( '127.0.0.1:11211' );
+			}
+
+			reset( $buckets );
+			if ( is_int( key( $buckets ) ) ) {
+				$buckets = array( 'default' => $buckets );
+			}
+
+			foreach ( $buckets as $bucket => $servers ) {
+				$this->mc[ $bucket ] = new Memcached();
+
+				$instances = array();
+				foreach ( $servers as $server ) {
+					@list( $node, $port ) = explode( ':', $server );
+					if ( empty( $port ) ) {
+						$port = ini_get( 'memcache.default_port' );
+					}
+					$port = intval( $port );
+					if ( ! $port ) {
+						$port = 11211;
+					}
+
+					$instances[] = array( $node, $port, 1 );
+				}
+				$this->mc[ $bucket ]->addServers( $instances );
+			}
+
+			global $blog_id, $table_prefix;
+			$this->global_prefix = '';
+			$this->blog_prefix   = '';
+			if ( function_exists( 'is_multisite' ) ) {
+				$this->global_prefix = ( is_multisite() || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) ) ? '' : $table_prefix;
+				$this->blog_prefix   = ( is_multisite() ? $blog_id : $table_prefix ) . ':';
+			}
+
+			$this->cache_hits   =& $this->stats['get'];
+			$this->cache_misses =& $this->stats['miss'];
+		}
 	}
-}
 else: // No Memcached
 
 	// In 3.7+, we can handle this smoothly
 	if ( function_exists( 'wp_using_ext_object_cache' ) ) {
 		wp_using_ext_object_cache( false );
 
-	// In earlier versions, there isn't a clean bail-out method.
+		// In earlier versions, there isn't a clean bail-out method.
 	} else {
 		wp_die( 'Memcached class not available.' );
 	}
 
-endif;
\ No newline at end of file
+endif;

From 8f74747f04f8cfbbdb9e4606e5de8aa00c890f55 Mon Sep 17 00:00:00 2001
From: mustafauysal <me@uysalmustafa.com>
Date: Mon, 8 May 2023 17:06:35 +0300
Subject: [PATCH 3/6] Add wp_cache_supports

---
 object-cache.php | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/object-cache.php b/object-cache.php
index 7eb7d72..20e7a6d 100644
--- a/object-cache.php
+++ b/object-cache.php
@@ -2,7 +2,7 @@
 /*
 Plugin Name: Memcached Redux
 Description: The real Memcached (not Memcache) backend for the WP Object Cache.
-Version: 0.1.8
+Version: 0.1.9
 Plugin URI: https://github.com/Ipstenu/memcached-redux
 Author: Scott Taylor - uses code from Ryan Boren, Denis de Bernardy, Matt Martz, Mike Schroder, Mika Epstein
 
@@ -15,6 +15,30 @@
 
 if ( class_exists( 'Memcached' ) ):
 
+	/**
+	 * Determines whether the object cache implementation supports a particular feature.
+	 *
+	 * @param string $feature Name of the feature to check for. Possible values include:
+	 *                        'add_multiple', 'set_multiple', 'get_multiple', 'delete_multiple',
+	 *                        'flush_runtime', 'flush_group'.
+	 *
+	 * @return bool True if the feature is supported, false otherwise.
+	 * @since 0.1.9
+	 *
+	 */
+	function wp_cache_supports( $feature ) {
+		switch ( $feature ) {
+			case 'add_multiple':
+			case 'set_multiple':
+			case 'get_multiple':
+			case 'delete_multiple':
+				return true;
+
+			default:
+				return false;
+		}
+	}
+
 	function wp_cache_add( $key, $data, $group = '', $expire = 0 ) {
 		global $wp_object_cache;
 

From 855a76ee764d6bed90c17592b67848ad5e3b7a4c Mon Sep 17 00:00:00 2001
From: mustafauysal <me@uysalmustafa.com>
Date: Wed, 10 May 2023 14:01:25 +0300
Subject: [PATCH 4/6] Update memcached redux

---
 object-cache.php | 64 ++++++++++++++++++------------------------------
 1 file changed, 24 insertions(+), 40 deletions(-)

diff --git a/object-cache.php b/object-cache.php
index 20e7a6d..84997cc 100644
--- a/object-cache.php
+++ b/object-cache.php
@@ -2,7 +2,7 @@
 /*
 Plugin Name: Memcached Redux
 Description: The real Memcached (not Memcache) backend for the WP Object Cache.
-Version: 0.1.9
+Version: 0.2
 Plugin URI: https://github.com/Ipstenu/memcached-redux
 Author: Scott Taylor - uses code from Ryan Boren, Denis de Bernardy, Matt Martz, Mike Schroder, Mika Epstein
 
@@ -30,6 +30,7 @@ function wp_cache_supports( $feature ) {
 		switch ( $feature ) {
 			case 'add_multiple':
 			case 'set_multiple':
+			case 'flush_runtime':
 			case 'get_multiple':
 			case 'delete_multiple':
 				return true;
@@ -93,10 +94,10 @@ function wp_cache_get( $key, $group = '', $force = false, &$found = null ) {
 		return $wp_object_cache->get( $key, $group, $force, $found );
 	}
 
-	function wp_cache_get_multiple( $keys, $group = '' ) {
+	function wp_cache_get_multiple( $keys, $group = '', $force = false ) {
 		global $wp_object_cache;
 
-		return $wp_object_cache->get_multiple( $keys, $group );
+		return $wp_object_cache->get_multiple( $keys, $group, $force );
 	}
 
 	/**
@@ -165,6 +166,13 @@ function wp_cache_add_non_persistent_groups( $groups ) {
 		$wp_object_cache->add_non_persistent_groups( $groups );
 	}
 
+	function wp_cache_flush_runtime() {
+		global $wp_object_cache;
+
+		return $wp_object_cache->flush_runtime();
+	}
+
+
 	class WP_Object_Cache {
 		var $global_groups = array();
 
@@ -255,6 +263,13 @@ function close() {
 			// Silence is Golden.
 		}
 
+		function flush_runtime() {
+			$this->cache     = array();
+			$this->group_ops = array();
+
+			return true;
+		}
+
 		function delete( $id, $group = 'default' ) {
 			$key = $this->key( $id, $group );
 
@@ -341,46 +356,14 @@ function get( $id, $group = 'default', $force = false, &$found = null ) {
 			return $value;
 		}
 
-		public function get_multiple( $keys, $group = 'default' ) {
-			$return = array();
-			$gets   = array();
-			foreach ( $keys as $i => $values ) {
-				$mc     =& $this->get_mc( $group );
-				$values = (array) $values;
-				if ( empty( $values[1] ) ) {
-					$values[1] = 'default';
-				}
-
-				list( $id, $group ) = (array) $values;
-				$key = $this->key( $id, $group );
-
-				if ( isset( $this->cache[ $key ] ) ) {
-
-					if ( is_object( $this->cache[ $key ] ) ) {
-						$return[ $key ] = clone $this->cache[ $key ];
-					} else {
-						$return[ $key ] = $this->cache[ $key ];
-					}
-
-				} else if ( in_array( $group, $this->no_mc_groups ) ) {
-					$return[ $key ] = false;
-
-				} else {
-					$gets[ $key ] = $key;
-				}
-			}
+		public function get_multiple( $keys, $group = 'default', $force = false) {
+			$values = array();
 
-			if ( ! empty( $gets ) ) {
-				$results = $mc->getMulti( $gets, $null, Memcached::GET_PRESERVE_ORDER );
-				$joined  = array_combine( array_keys( $gets ), array_values( $results ) );
-				$return  = array_merge( $return, $joined );
+			foreach ( $keys as $key ) {
+				$values[ $key ] = $this->get( $key, $group, $force );
 			}
 
-			++ $this->stats['get_multi'];
-			$this->group_ops[ $group ][] = "get_multi $id";
-			$this->cache                 = array_merge( $this->cache, $return );
-
-			return array_values( $return );
+			return $values;
 		}
 
 		function get_multi( $keys, $group = 'default' ) {
@@ -667,3 +650,4 @@ function __construct() {
 	}
 
 endif;
+

From 78b0d00cbf0430e35b0df24903c83bb911ea4e44 Mon Sep 17 00:00:00 2001
From: mustafauysal <me@uysalmustafa.com>
Date: Tue, 30 May 2023 19:06:34 +0300
Subject: [PATCH 5/6] fix set_multiple

---
 object-cache.php | 37 ++++++-------------------------------
 1 file changed, 6 insertions(+), 31 deletions(-)

diff --git a/object-cache.php b/object-cache.php
index 84997cc..1e0eb12 100644
--- a/object-cache.php
+++ b/object-cache.php
@@ -2,7 +2,7 @@
 /*
 Plugin Name: Memcached Redux
 Description: The real Memcached (not Memcache) backend for the WP Object Cache.
-Version: 0.2
+Version: 0.2.1
 Plugin URI: https://github.com/Ipstenu/memcached-redux
 Author: Scott Taylor - uses code from Ryan Boren, Denis de Bernardy, Matt Martz, Mike Schroder, Mika Epstein
 
@@ -462,39 +462,14 @@ function set( $id, $data, $group = 'default', $expire = 0 ) {
 			return $result;
 		}
 
-		function set_multiple( $items, $group = 'default', $expire = 0 ) {
-			$sets   = array();
-			$mc     =& $this->get_mc( $group );
-			$expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
-
-			foreach ( $items as $i => $item ) {
-				if ( empty( $item[2] ) ) {
-					$item[2] = 'default';
-				}
-
-				list( $id, $data, $group ) = $item;
-
-				$key = $this->key( $id, $group );
-				if ( isset( $this->cache[ $key ] ) && ( 'checkthedatabaseplease' === $this->cache[ $key ] ) ) {
-					continue;
-				}
-
-				if ( is_object( $data ) ) {
-					$data = clone $data;
-				}
-
-				$this->cache[ $key ] = $data;
-
-				if ( in_array( $group, $this->no_mc_groups ) ) {
-					continue;
-				}
+		public function set_multiple( array $data, $group = '', $expire = 0 ) {
+			$values = array();
 
-				$sets[ $key ] = $data;
+			foreach ( $data as $key => $value ) {
+				$values[ $key ] = $this->set( $key, $value, $group, $expire );
 			}
 
-			if ( ! empty( $sets ) ) {
-				$mc->setMulti( $sets, $expire );
-			}
+			return $values;
 		}
 
 		function set_multi( $items, $expire = 0, $group = 'default' ) {

From 4ebc8a4821407be89164909a2efa381ee53cded3 Mon Sep 17 00:00:00 2001
From: mustafauysal <me@uysalmustafa.com>
Date: Mon, 4 Sep 2023 16:40:43 +0300
Subject: [PATCH 6/6] Add class properties to avoid Dynamic property warnings

See: https://github.com/Automattic/wp-memcached/pull/149
---
 object-cache.php | 29 +++++++++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/object-cache.php b/object-cache.php
index 1e0eb12..696f33c 100644
--- a/object-cache.php
+++ b/object-cache.php
@@ -180,12 +180,37 @@ class WP_Object_Cache {
 
 		var $cache = array();
 		var $mc = array();
-		var $stats = array();
-		var $group_ops = array();
+		var $default_mcs   = array();
+		var $stats         = array(
+			'get'          => 0,
+			'get_local'    => 0,
+			'get_multi'    => 0,
+			'set'          => 0,
+			'set_local'    => 0,
+			'add'          => 0,
+			'delete'       => 0,
+			'delete_local' => 0,
+			'slow-ops'     => 0,
+		);
+		var $group_ops     = array();
+		var $cache_hits    = 0;
+		var $cache_misses  = 0;
+		var $global_prefix = '';
+		var $blog_prefix   = '';
+		var $key_salt      = '';
+
+		var $flush_group         = 'WP_Object_Cache';
+		var $global_flush_group  = 'WP_Object_Cache_global';
+		var $flush_key           = "flush_number_v4";
+		var $old_flush_key       = "flush_number";
+		var $flush_number        = array();
+		var $global_flush_number = null;
 
 		var $cache_enabled = true;
 		var $default_expiration = 0;
 
+		var $time_start = 0;
+		
 		function add( $id, $data, $group = 'default', $expire = 0 ) {
 			$key = $this->key( $id, $group );