microtime()

[Anon]

I'm trying to calculate the time of a PHP script, using microtime() function.
The problem is that the result seems to be very unprecise ! (+ or - 1 second ! )
For example, with a null time, the result end-start is between -1 sec and +1 sec !
Do you have information or solution about it ?
Thanks a lot !
NB : I'm using WinNT + Apache + PHP

[[deleted]]

what's the code you use?

[Anon]

function GetMicroTime(){
$mtime = microtime();
$mtime = explode(" ",$mtime);
$mtime = $mtime[1] + $mtime[0];
return ($mtime);
}

class c_Timer {
var $t_start = 0;
var $t_stop = 0;
var $t_elapsed = 0;

function start() {
$this->t_start = GetMicroTime();}

function stop() {
$this->t_stop = GetMicroTime();}

function elapsed() {
$this->t_elapsed = $this->t_stop - $this->t_start;
return $this->t_elapsed;
}

[[deleted]]

That works nicely.
Are you sure you don't forget to call the start() procedure now and then?