Ooops! I seem to have posted a topic twice!

[fopetesl]

Where do I apologise for a boo boo? Somehow (I don't know how) the topic got posted twice and I cannot see any way to delete one. I guess it's an admin's privelidge.
So - oops - sorry

Topic is "Is there a CD in the drive (LINUX)"
in
SitePoint Forums > Program Your Site > PHP

[stymiee]

Don't worry. An advisor or team leader will spot it soon enough and delete it. They'll then come looking for you with their billy clubs and torches and lynch you. Nothing to worry about.

[vgarcia]

Just kidding, I'll move it

[fopetesl]

.. do my best not to let it happen again. Now all I need is some kind guru to help me with the problem!
ciao

[Hierophant]

Only press submit once...

[Hartmann]

Only press submit once...

I'm surprised that vB let him post that soon, usually it doesn't.

[stymiee]

Only press submit once...

A snippet of JavaScript can solve that problem pretty easily. Just disable the submit button after it has been pressed. Or just set the onsubmit eventhandler to false. Great way for ecommerce sites to weed out accidental duplicate orders, too.

Guess:

onsubmit = disableForm;

function disableForm(){
    onsubmit = false;
}

[Hierophant]

I'm surprised that vB let him post that soon, usually it doesn't.

It is a newly discovered race condition that was found. If a site is slow to respond, you can submit multiple queries and have them succeed before the limit is checked on the first query.

The developers are working on it. Under most circumstances you are correct though, he would have received an error.