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

示例

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);
?>

以上示例的输出类似于：

Let's do something with success
42
43
53
63
bool(true)
Now, let's fail

bool(false)
bool(false)

参见

apcu_dec() - Decrease a stored number