Memcache + PHP - Why data is not expiring?

Question

I have a simple example where I set a value for 5 seconds. The problem is that after 5 seconds; I still get back a value when I expected 'false'. ``` $memcache = new Memcache; $memcache->connect('localhost', 11211) or die ("Could not connect"); $memcache->set('foo', 'bar', 0, 5); // 5 seconds expiry var_dump($memcache->get('foo')); // bar sleep(10); var_dump($memcache->get('foo')); // still shows bar ``` Here is the memcache server version Server's version: 1.4.13

Accepted Answer

Late to the game, but in your code it looks like you are passing "0" for the expiration (not "5"), which translates to "never expire" Specifically:

```
 $memcache->set('foo', 'bar', 0, 5); // 5 seconds expiry
```

Should be:

```
 $memcache->set('foo', 'bar', 5); // 5 seconds expiry
```

Unless I'm misunderstanding the PHP documentation located here, which shows that the set command takes three parameters:

```
 public bool Memcached::set ( string $key , mixed $value [, int $expiration ] )
```

Edit: Whoops, I see that you're using the Memcache extension and not Memcached, which does have four parmaters. Perhaps try using the MEMCACHE_COMPRESSED constant instead of 0 to see if it works:

```
 $memcache->set('foo', 'bar', MEMCACHE_COMPRESSED, 5); // 5 seconds expiry
```

Memcache + PHP - Why data is not expiring?

Solution

Problem