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# Memcache::replace

(no version information, might be only in CVS)

Memcache::replace -- Replace value of the existing item

## Beschreibung

bool Memcache::replace ( string key, mixed var [, int flag [, int expire]] )

Memcache::replace() should be used to replace value of existing item with `key`. In case if item with such key doesn't exists, Memcache::replace() returns `FALSE`. For the rest Memcache::replace() behaves similarly to Memcache::set(). Also you can use memcache_replace() function.

## Parameter Liste

`key`

  The key that will be associated with the item.

`var`

  The variable to store. Strings and integers are stored as is, other types are stored serialized.

`flag`

  Use `MEMCACHE_COMPRESSED` to store the item compressed (uses zlib).

`expire`

  Expiration time of the item. If it's equal to zero, the item will never expire. You can also use Unix timestamp or a number of seconds starting from current time, but in the latter case the number of seconds may not exceed 2592000 (30 days).

## Rückgabewerte

Gibt bei Erfolg `TRUE` zurück, im Fehlerfall `FALSE`.

## Beispiele

Beispiel 1. Memcache::replace() example

`<?php $memcache_obj = memcache_connect('memcache_host', 11211); /* procedural API */ memcache_replace($memcache_obj, "test_key", "some variable", false, 30); /* OO API */ $memcache_obj->replace("test_key", "some variable", false, 30); ?>`

## Siehe auch

Memcache::set()
Memcache::add()

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