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(PECL wincache >= 1.1.0)
wincache_ucache_cas — Compares the variable with old value and assigns new value to it
$key
, int $old_value
, int $new_value
)
Compares the variable associated with the key
with old_value
and if it matches then assigns the new_value
to it.
key
The key
that is used to store the variable in the cache.
key
is case sensitive.
old_value
Old value of the variable pointed by key
in the user cache.
The value should be of type long, otherwise the function returns
FALSE
.
new_value
New value which will get assigned to variable pointer by key
if a
match is found. The value should be of type long, otherwise
the function returns FALSE
.
成功时返回 TRUE
, 或者在失败时返回 FALSE
。
Example #1 Using wincache_ucache_cas()
<?php
wincache_ucache_set ( 'counter' , 2922 );
var_dump ( wincache_ucache_cas ( 'counter' , 2922 , 1 ));
var_dump ( wincache_ucache_get ( 'counter' ));
?>
以上例程会输出:
bool(true) int(1)