Memcached::increment
(PECL memcached >= 0.1.0)
Memcached::increment — Increment numeric item's value
Description
public Memcached::increment ( string $key [, int $offset = 1 [, int $initial_value = 0 [, int $expiry = 0 ]]] ) : int|false
Memcached::increment() increments a numeric item's value by the specified offset. If the item's value is not numeric, an error will result. Memcached::increment() will set the item to the initial_value parameter if the key doesn't exist.
Parameters
-
key -
The key of the item to increment.
-
offset -
The amount by which to increment the item's value.
-
initial_value -
The value to set the item to if it doesn't currently exist.
-
expiry -
The expiry time to set on the item.
Return Values
Returns new item's value on success or false on failure.
Examples
Example #1 Memcached::increment() example
<?php
$m = new Memcached();
$m->addServer('localhost', 11211);
$m->set('counter', 0);
$m->increment('counter');
$n = $m->increment('counter', 10);
var_dump($n);
$m->set('counter', 'abc');
$n = $m->increment('counter');
// ^ will fail due to item value not being numeric
var_dump($n);
?> The above example will output:
int(11) bool(false)
See Also
- Memcached::decrement() - Decrement numeric item's value
- Memcached::decrementByKey() - Decrement numeric item's value, stored on a specific server
- Memcached::incrementByKey() - Increment numeric item's value, stored on a specific server
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https://www.php.net/manual/en/memcached.increment.php