Re: Random Unique ID

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2007. 03. 23, péntek keltezéssel 08.13-kor Robert Cummings ezt írta:
> On Fri, 2007-03-23 at 09:15 +0100, Németh Zoltán wrote:
> 
> > // method 2
> > $time = microtime(TRUE);
> > for ($i = 1; $i <= 5000; $i++) {
> > 	$done = FALSE;
> > 	while (!$done) {
> > 		$id = md5((microtime(TRUE) * (rand(1,1000) / 100)));
> > 		$sql = "INSERT INTO idtest (id,cnt) VALUES ('$id', $i)";
> > 		$result = mysql_query($sql);
> > 		if ($result) { $done = TRUE; }
> > 	}
> > }
> > $end = microtime(TRUE) - $time;
> > echo "method 2 time: " . $end . "<br>";
> 
> One of the problems with the above style is that if the query fails for
> some other reason (typo, no permissions, database temporarily
> unavailable, etc) the code will run indefinitely (or until it gets
> killed for too much time). That's a very dirty way to manage failed
> inserts due to dupes.

yes, of course. that's good only for this small test, not for real life
use ;)
for real use one should check mysql_errno end take action based on that

greets
Zoltán Németh

> 
> Cheers,
> Rob.

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