memcached doesn't work with plugin phpSerialize

[ares333]

centos 7 php 7.1 memcached 1.5.3

$mem = new Zend\Cache\Storage\Adapter\Memcached(
    [
        'servers' => [
            'localhost',
            11211
        ]
    ]);
$mem->addPlugin(
    Zend\Cache\StorageFactory::pluginFactory('serializer',
        [
            'serializer' => 'phpSerialize'
        ]));
$key = 'test';
if (! $mem->hasItem($key)) {
    $mem->addItem($key, 0);
}
$mem->incrementItem($key, 1);
print_r($mem->getItem($key));

Memcached server has been restarted and clean before running the code.Exception is as below:

Zend\Cache\Exception\RuntimeException: ERROR was returned by server in /srv/www/1crud.com/app/library/vendor/zendframework/zend-cache/src/Storage/Adapter/Memcached.php:645
Stack trace:
#0 /srv/www/1crud.com/app/library/vendor/zendframework/zend-cache/src/Storage/Adapter/Memcached.php(425): Zend\Cache\Storage\Adapter\Memcached->getExceptionByResultCode(11)
#1 /srv/www/1crud.com/app/library/vendor/zendframework/zend-cache/src/Storage/Adapter/AbstractAdapter.php(1010): Zend\Cache\Storage\Adapter\Memcached->internalCheckAndSetItem(NULL, 'test', 'i:1;')
#2 /srv/www/1crud.com/app/library/vendor/zendframework/zend-cache/src/Storage/Plugin/Serializer.php(138): Zend\Cache\Storage\Adapter\AbstractAdapter->checkAndSetItem(NULL, 'test', 1)
#3 /srv/www/1crud.com/app/library/vendor/zendframework/zend-eventmanager/src/EventManager.php(322): Zend\Cache\Storage\Plugin\Serializer->onIncrementItemPre(Object(Zend\Cache\Storage\Event))
#4 /srv/www/1crud.com/app/library/vendor/zendframework/zend-eventmanager/src/EventManager.php(171): Zend\EventManager\EventManager->triggerListeners(Object(Zend\Cache\Storage\Event))
#5 /srv/www/1crud.com/app/library/vendor/zendframework/zend-cache/src/Storage/Adapter/AbstractAdapter.php(207): Zend\EventManager\EventManager->triggerEvent(Object(Zend\Cache\Storage\Event))
#6 /srv/www/1crud.com/app/library/vendor/zendframework/zend-cache/src/Storage/Adapter/AbstractAdapter.php(1270): Zend\Cache\Storage\Adapter\AbstractAdapter->triggerPre('incrementItem', Object(ArrayObject))
#7 /srv/www/1crud.com/app/controllers/Test.php(25): Zend\Cache\Storage\Adapter\AbstractAdapter->incrementItem('test', 1)
#8 [internal function]: TestController->indexAction()
#9 /srv/www/1crud.com/public/index.php(7): Yaf\Application->run()
#10 {main}

[marc-mabe]

If you are using a serializer on zend-cache level the data (in your case an integer 1) gets serialized as string before reaching the memcached extension. This way memcached can’t identify the stringified value as integer.

For using increment/decrement functionality you need to use the memcached internal serializer functionality.

• remove the zend cache serializer plugin
• add the memcache serializer (lib_options) https://zendframework.github.io/zend-cache/storage/adapter/#the-memcached-adapter http://php.net/manual/de/memcached.constants.php

[ares333]

@marc-mabe Thanks very much.