what happen with my memcache (and php), please help

[Travis Boucher]

Try using add().  set() will set it unconditionally.

son at raider.co.nz wrote:
> Hello all
>
> I have a php page that call function bellow:
>
> ----------------------
>
> function redirect_process($key) {
>     ....
> 	$value = $memcache->get($key); //get value from memcache
> 	if (!$value) {
> 			if (!$memcache->get('temp:'.$key)) {
> 	    		$memcache->set('temp:'.$key, 1); //set 1
>                 echo 'This key is NOT set';
> 				usleep(50000000); //sleep for 50 seconds
> 				$memcache->delete('temp:'.$key); //delete this key
>     	    }
> 			else if	($memcache->get('temp:'.$key))  {
> 				echo 'this key AREADY set';
>          }
>     }
> }
>
> -------------------------------------
>
> Then I hit the page with a key that is not in memcache yet sing browsers 
> (firefox) in my computer. The second is after the first.
>
> However, I never get the message "this key AREADY set".
>
> In both cases, I only get 'This key is NOT set'.
>
> I donot know why. I think that my code is very clear.
>
> Note: I ONLY "get this key AREADY set" message when I remove the code:
>
> usleep(50000000);
> $memcache->delete('temp:'.$key);
>
>
> Could you please help
> regards
> shoa
>
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