Memcached::isPristine()
(PECL memcached >= 2.0.0)
Check if the instance was recently created
说明
public Memcached::isPristine(void): bool
Memcached::isPristine() checks if the Memcache instance was recently created.
参数
此函数没有参数。
返回值
Returns the true if instance is recently created, false otherwise.
参见
- Memcached::isPersistent() Check if a persitent connection to memcache is being used
How is the return value determined? What is the definition of 'recently'? Does this function return true if the item was stored using the current connection?
From the source code of contructor, the "recently" means the connection to server of the instence is recently created, that is the instance was created without a persistent_id parameter or the first to use the persistent_id.
For instance, the gives a bool(true):
$memcached = new Memcached();
$isPristine = $memcached->isPristine();
var_dump($isPristine);
This also gives a bool(true):
$memcached = new Memcached('pid1');
$isPristine = $memcached->isPristine();
var_dump($isPristine);
while this gives a bool(false):
$memcached = new Memcached('pid1');
$memcached2 = new Memcached('pid1');
$isPristine = $memcached2->isPristine();
var_dump($isPristine);