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 PHP manuál : function.memcache-increment.html

Memcache::increment
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Memcache::increment

(no version information, might be only in CVS)

Memcache::increment -- Increment item's value

Description

int Memcache::increment ( string key [, int value] )

Memcache::increment() increments value of the item on the specified value. If item with key key was not numeric and cannot be converted to number, it will change it's value to value.

Parameter value is optional. It's default value is 1.

Note: Do not use Memcache::increment() with item, which was stored compressed, because consequent call to Memcache::get() will fail.

Also you can use memcache_increment() function. See example below.

Example 1. Memcache::increment() example

<?php

/* procedural API */
$memcache_obj = memcache_connect('memcache_host', 11211);
/* increment counter by 2 */
$current_value = memcache_increment($memcache_obj, 'counter', 2);

/* OO API */
$memcache_obj = new Memcache;
$memcache_obj->connect('memcache_host', 11211);
/* increment counter by 3 */
$current_value = $memcache_obj->increment('counter', 3);

?>

Memcache::increment() returns new item's value on success or FALSE on failure.

Memcache::increment() does not create an item if it didn't exist.

See also Memcache::decrement(), Memcache::replace().

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