php-redisGet expiration time of key in Redis

$redis->ttl('key');ctrl + cgithub

`$redis` Redis object after connection	`ttl` returns seconds left for the key to live
`key` name of the key to get expiration for

<?php

$r = new Redis(); 
$r->connect('127.0.0.1', 6379);

$r->setex('key', 30, 'test');
sleep(1);

echo $r->ttl('key');