apcu_dec
(PECL apcu >= 4.0.0)
apcu_dec — Decrease a stored number
説明
int apcu_dec
( string
$key
[, int $step = 1
[, bool &$success
]] )Decreases a stored integer value.
パラメータ
-
key -
The key of the value being decreased.
-
step -
The step, or value to decrease.
-
success -
Optionally pass the success or fail boolean value to this referenced variable.
返り値
Returns the current value of key's value on success,
失敗した場合に FALSE を返します
例
例1 apcu_dec() example
<?php
echo "Let's do something with success", PHP_EOL;
apcu_store('anumber', 42);
echo apcu_fetch('anumber'), PHP_EOL;
echo apcu_dec('anumber'), PHP_EOL;
echo apcu_dec('anumber', 10), PHP_EOL;
echo apcu_dec('anumber', 10, $success), PHP_EOL;
var_dump($success);
echo "Now, let's fail", PHP_EOL, PHP_EOL;
apcu_store('astring', 'foo');
$ret = apcu_dec('astring', 1, $fail);
var_dump($ret);
var_dump($fail);
?>
上の例の出力は、 たとえば以下のようになります。
Let's do something with success 42 41 31 21 bool(true) Now, let's fail bool(false) bool(false)
参考
- apcu_inc() - Increase a stored number
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