[RESOLVED] developing with ajax

[id_ivan]

I'm a long time learner php and web programming.. once every year, in my annual vacation like now (😃 I'm in two weeks national holiday for celebrating Ied), I have enough time to revisit my script. And off course, I kind of restarting a whole new chapter again for so many thing has change every time i look upon web tech.
So, I actually finished one cms system back in 2003.. I kinda like it, but thats it.. for about 2-3 years back, i redeveloped it from scratch. Now, each time i found an interested enough site, there's always ajax incorporated. As I never interested in javascript since they invented annoying mouse trail on websites, frankly i dont even understand javascript/DOM the way i do it in PHP. :queasy:

To cut it short I asked you how to do it easiest way:
1. Can i just do regular PHP coding and add ajax thing later or should i bear it in mind while coding the PHP? eg: break down the functions into smaller chunk of file where Ajax could invoke it directly from browser? Is it possible for adding it at a later time at all?
2. what should i take into consideration (security wise) when developing an ajax application?
3. I modified an ajax shoutbox script attached to my frontend. This script refresh every 1 second. Does this kind of script affecting significant load on server? The script currently hosted on my pc, but i dont wanna get suspended when it goes live on my webhost.

These question has bothering me quite few days now. Thanks in advance for your response.

[sneakyimp]

1) If you plan to use AJAX at some point, it's probably a good idea to plan your project with that in mind. On the other hand, it's pretty easy to incorporate an AJAX autocomplete function into a text input. It sort of depends on what sort of AJAX you have in mind.

2) I would try to make sure that I prevent people from accessing my server-side PHP scripts that work with AJAX. Otherwise, anyone can build a form with AJAX widgets in it and capitalize on your form. I think this is pretty easily done with sessions.

3) Not sure what shoutbox is, but 1 load per second doesn't sound like a lot unless you have a lot of users all open to the same page. What's wrong with 3 seconds or 5 seconds? Of your webhost gets angry, consider firing up a VPS at rackspace.com. They're pretty cheap.

[id_ivan]

hi sneakyimp..
thank you for taking your time. I'm trying to read more on this subject, glad you're pointing me in right direction.. thanks for mention Ajax session too, I'm unaware of that..