wincache_ucache_dec

(PECL wincache >= 1.1.0)

wincache_ucache_dec — Decrements the value associated with the key

mixed wincache_ucache_dec ( string $key [, int $dec_by = 1 [, bool &$success ]] )

Decrements the value associated with the key by 1 or as specified by dec_by.

key: The key that was used to store the variable in the cache. key is case sensitive.
dec_by: The value by which the variable associated with the key will get decremented. If the argument is a floating point number it will be truncated to nearest integer. The variable associated with the key should be of type long, otherwise the function fails and returns FALSE .
success: Will be set to TRUE on success and FALSE on failure.

Returns the decremented value on success and FALSE on failure.

Example #1 Using wincache_ucache_dec()

  <?php
wincache_ucache_set ( 'counter' ,  1 );
 var_dump ( wincache_ucache_dec ( 'counter' ,  2923 ,  $success ));
 var_dump ( $success );
 ?>

以上例程会输出：

int(2922) 
bool(true)

wincache_ucache_inc() - Increments the value associated with the key
wincache_ucache_cas() - Compares the variable with old value and assigns new value to it