Compatibility

Relay is designed to be a drop-in replacement for PhpRedis.

Compatibility mode

PhpRedis will return false in the event that a key doesn’t exist, but also if there is an error. This makes it hard to distinguish the two return values.

$redis = new Redis;
$redis->get('i-do-not-exist'); // false

Relay however will return null if a key doesn’t exist, and will throw an exception if there is an error.

$relay = new Relay;
$relay->get('i-do-not-exist'); // null

To change Relay’s behavior, you may enable it’s compatibility mode.

$relay = new Relay;
$relay->setOption(Relay::OPT_PHPREDIS_COMPATIBILITY, true);
$relay->get('i-do-not-exist'); // false

Commands

The table below provides an overview of which commands aresupported, enhanced or simply proxied.

• Compatible commands work just like in PhpRedis
• Enhanced commands work just like in PhpRedis, with additional in-memory processing
• Proxied commands are send to Redis as is and their API might differ from PhpRedis