keys() returning keys with prefix

[tijmenb]

I don't know if this is intended behavior, but it got me puzzled for a while:

$redis = new Redis();
$redis->connect('127.0.0.1');
$redis->setOption(Redis::OPT_PREFIX, 'somefix:');

$redis->set('foo', 'bar');

foreach ($redis->keys("*") as $key)
{
    echo $redis->get($key); // won't work, as it's trying to get somefix:somefix:foo

    $key = str_replace('somefix:', '', $key);
    echo $redis->get($key); // will work, returns bar.
}

[nicolasff]

Hello,

This is on purpose, you can use "prefix:_" if you want to select those. The thing is, if you have 2 apps talking to Redis and 1 sets the key "users" whilst the other one uses "prefix:users", running keys('_') will match both. What would it mean to get "users" twice in your return array?

So either prefix your pattern in your call to keys("*") or strip them afterwards. In any case, calling this method is usually not recommended, as it has to go through all of your keys, whatever the pattern may be.

[tijmenb]

I used the prefix function to separate testing data from other data, and I expected keys() to return the keys without the prefix, so I could easily call del() on them after a test. But on second look it seems better to use select() and flushdb() for that.

Thanks for your reply!