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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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