Compares the variable with old value and assigns new value to it

# wincache_ucache_cas

(PECL wincache >= 1.1.0)

wincache_ucache_cas — Compares the variable with old value and assigns new value to it

### Description

wincache_ucache_cas(string `$key`, int `$old_value`, int `$new_value`): bool

Compares the variable associated with the `key` with `old_value` and if it matches then assigns the `new_value` to it.

### Parameters

`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`.

### Return Values

Returns `true` on success or `false` on failure.

### Examples

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'));
?>`

The above example will output:

    bool(true)
    int(1)

### See Also

- wincache_ucache_inc() - Increments the value associated with the key
- wincache_ucache_dec() - Decrements the value associated with the key

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