Memcached::add

(PECL memcached >= 0.1.0)

Memcached::add — Add an item under a new key

Description

public Memcached::add(string $key, mixed $value, int $expiration = 0): bool

Memcached::add() is similar to Memcached::set(), but the operation fails if the key already exists on the server.

Parameters

key: The key under which to store the value.
value: The value to store.
expiration: The expiration time, defaults to 0. See Expiration Times for more info.

Return Values

Returns true on success or false on failure. The Memcached::getResultCode() will return Memcached::RES_NOTSTORED if the key already exists.

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User Contributed Notes 1 note

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ilya dot chase at yandex dot ru ¶

5 years ago

Note that this operation is atomic, means that it's safe from race condition operation (since memcached is running in single process). You can use this method for locks and can be sure that two requests will not get "true" simultaneously using this method.