<?php
require __DIR__ . '/vendor/autoload.php';

$config = [
    'adapter' => [
        'name' => 'redis',
        'options' => [
            'server' => [
                'host' => 'localhost',
                'port' => 6379,
            ],
        ]
    ]
];

// works
$redisCache = \Zend\Cache\StorageFactory::factory($config);
var_dump(get_class($redisCache));

$config = [
    'adapter' => [
        'name' => 'redis',
        'options' => [
            'server' => [
                'host' => 'localhost',
                'port' => 6379,
            ],
            'lib_options' => [
                \Redis::OPT_SERIALIZER => \Redis::SERIALIZER_IGBINARY,
            ],
        ]
    ]
];

// works
$redisCache = \Zend\Cache\StorageFactory::factory($config);
var_dump(get_class($redisCache));

$config = [
    'adapter' => [
        'name' => 'redis',
        'options' => [
            'lib_options' => [
                \Redis::OPT_SERIALIZER => \Redis::SERIALIZER_IGBINARY,
            ],
            'server' => [
                'host' => 'localhost',
                'port' => 6379,
            ],
        ]
    ]
];

// fails
$redisCache = \Zend\Cache\StorageFactory::factory($config);
var_dump(get_class($redisCache));