# Memcache::flush

(PECL memcache >= 1.0.0)

Memcache::flush — Flush all existing items at the server

### Description

Memcache::flush ( ) : bool

Memcache::flush() immediately invalidates all existing items. Memcache::flush() doesn't actually free any resources, it only marks all the items as expired, so occupied memory will be overwritten by new items. Also you can use memcache_flush() function.

### Return Values

Returns `TRUE` on success or `FALSE` on failure.

### Examples

Example #1 Memcache::flush() example

`<?php
/* procedural API */
$memcache_obj = memcache_connect('memcache_host', 11211);
memcache_flush($memcache_obj);
/* OO API */
$memcache_obj = new Memcache;
$memcache_obj->connect('memcache_host', 11211);
$memcache_obj->flush();
?>`