public function expireIfKeyHasValue($key, $value, $ttlInSeconds)
{
if (empty($value)) {
return false;
}
$this->connectIfNeeded();
$script = 'if redis.call("GET",KEYS[1]) == ARGV[1] then
return redis.call("EXPIRE",KEYS[1], ARGV[2])
else
return 0
end';
// ideally we would use evalSha to reduce bandwidth!
return (bool) $this->redis->eval($script, array($key, $value, (int) $ttlInSeconds), 1);
}