PHP sleep accuracy

Posted by Abs on Stack Overflow See other posts from Stack Overflow or by Abs
Published on 2011-01-08T23:33:05Z Indexed on 2011/01/08 23:53 UTC
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Hello all,

I use the following code to see how long a user is on a particular page. I use a hidden image with a src attribute to this script:

$timer_seconds = 1;

while(!connection_aborted()) { 
   echo "\n";
   flush();
   sleep(1);
   $timer_seconds++;
}

I sometimes find this can be off by 5-10 seconds! I am guessing its the load of the server that effects the timing??

Is there anyway I can make this accurate?

Thanks all for any help.

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