Flush all existing items at the server

# Memcache::flush

# memcache_flush

(PECL memcache >= 1.0.0)

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

### Description

Memcache::flush(): bool
memcache_flush(Memcache `$memcache`): 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.

### Parameters

This function has no parameters.

### 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();
?>`
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