(PECL apc >= 3.1.1)
apc_inc — Increase a stored number
$key
[, int $step = 1
[, bool &$success
]] )Increases 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.
Returns the current value of key's value on success,
或者在失败时返回 FALSE
Example #1 apc_inc() example
<?php
echo "Let's do something with success", PHP_EOL;
apc_store('anumber', 42);
echo apc_fetch('anumber'), PHP_EOL;
echo apc_inc('anumber'), PHP_EOL;
echo apc_inc('anumber', 10), PHP_EOL;
echo apc_inc('anumber', 10, $success), PHP_EOL;
var_dump($success);
echo "Now, let's fail", PHP_EOL, PHP_EOL;
apc_store('astring', 'foo');
$ret = apc_inc('astring', 1, $fail);
var_dump($ret);
var_dump($fail);
?>
以上例程的输出类似于：
42 43 53 63 bool(true) Now, let's fail bool(false) bool(false)