Re: Scripts running twice

On Tue, Oct 12, 2010 at 07:52:46PM +0100, Ashley Sheridan wrote: > > On Tue, 2010-10-12 at 20:45 +0200, Alexander Schrijver wrote: > > On Tue, Oct 12, 2010 at 05:29:39PM +0100, [1]ash@ashleysheridan.co.uk wrote: > > That's probably it then! Some browsers make multiple requests to speed up rend > ering of a page. > > Do you have any examples of browsers which do this? Because that kind of > behaviour would be wrong. > > I just know that a couple of years ago, I was working on a website that > removed credits from a clients account upon a page visit. When the page > was accessed via a link, two credits were always taken. We did all > sorts of tests, from writing to the DB in a single call from that page, > and every time, it was coming up with two hits. This was happening on > all the main browsers: Fx, IE, Opera & Safari. > It's not the wrong behaviour, this is allowed behaviour when using the > GET protocol, which most general page requests are I believe. Reading the HTTP RFC this is allowed for a GET request with a range specified. I'm not sure how PHP deals with this.