RE: [PHP] Can a script run twice?

Futher to this... I found thatit does not do it with all my scripts... well as far as I am aware... how much is IE7 stuffing up I have NFI CK > -----Original Message----- > From: Stut [mailto:stuttle@gmail.com] > Sent: Tuesday, 23 May 2006 10:06 PM > To: Lester Caine > Cc: PHP List > Subject: Re: [PHP] Can a script run twice? > > Lester Caine wrote: > > > I'm having very occasional problems with my PHP5 applications which > > only seem to be explained if the script is run twice. > > > > Example - page has 'Add Ticket' button, which adds a record and marks > > it as being processed by the location that created it. 99.99% of the > > time no problems, but just now and again there are two records, with > > different primary keys - so the database bit worked - but with very > > close now times and identified as being at the same counter. The next > > page does not have the 'Add Ticket' button, so it would seem the first > > script was trigger twice? > > > > Am I simply going mad ( which is the logical choice ;) ), or is this > > something that can happen and needs to be handled? > > This can happen if a page contains a reference to an empty URL. For > example, <img src="" /> would cause the page to be loaded twice in some > browsers. That'd be the first thing I'd check. > > Is the 'Add Ticket' button a GET or POST request? If it's a POST then > chances are the script itself has a logic error since the user would get > asked if they wanted to repost the data. If it's a get then you've > violated one of the cardinal rules of web-based application development > - GETs get, POSTs do. > > -Stut > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php