apcu_inc

(PECL apcu >= 4.0.0)

apcu_inc — Increase a stored number

说明

apcu_inc ( string $key , int $step = 1 , bool &$success = ? , int $ttl = 0 ) : int|false

Increases a stored number.

参数

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).

返回值

Returns the current value of key's value on success, 或者在失败时返回 false

范例

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)

参见