update : 2015.11.03
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Memcached::casByKey(PECL memcached >= 0.1.0) Memcached::casByKey — Compare and swap an item on a specific server 설명
public bool Memcached::casByKey
( float
$cas_token
, string $server_key
, string $key
, mixed $value
[, int $expiration
] )
Memcached::casByKey() is functionally equivalent to
Memcached::cas(), except that the free-form
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