(PECL apcu >= 4.0.0)
apcu_inc — Increase a stored number
$key
, int $step
= 1
, bool &$success
= ?
, int $ttl
= 0
) : int|falseIncreases a stored number.
key
The key of the value being increased.
step
The step, or value to increase.
success
Optionally pass the success or fail boolean value to this referenced variable.
ttl
TTL to use if the operation inserts a new value (rather than incrementing an existing one).
Returns the current value of key
's value on success,
或者在失败时返回 false
示例 #1 apcu_inc() example
<?php
echo "Let's do something with success", PHP_EOL;
apcu_store('anumber', 42);
echo apcu_fetch('anumber'), PHP_EOL;
echo apcu_inc('anumber'), PHP_EOL;
echo apcu_inc('anumber', 10), PHP_EOL;
echo apcu_inc('anumber', 10, $success), PHP_EOL;
var_dump($success);
echo "Now, let's fail", PHP_EOL, PHP_EOL;
apcu_store('astring', 'foo');
$ret = apcu_inc('astring', 1, $fail);
var_dump($ret);
var_dump($fail);
?>
以上例程的输出类似于:
Let's do something with success 42 43 53 63 bool(true) Now, let's fail bool(false) bool(false)