find list of installed applications

Shell out to the command line system_profiler utility and parse the output...

 

System Profiler shows that information.

 

AppleScript allows you to tell your computer to do different commands and such... it's really not meant for acquiring information like the list of applications and their sizes. You might be thinking of using the Terminal, which can give you all that information, although you have to know a little bit of techno-speak to do it correctly.

Otherwise, yes -- using the System Profiler would be the easiest method. I don't think it's possible to do using AppleScript.

 

Tell AppleScript to run a shell script which can call the command line system_profiler tool

 

I have no idea. But if you are using a shell script from AppleScript why not just call that directly from PHP?

 

It tends to lead to System Profiler. Perhaps you need to explain why you're wanting to do this so people can give you a better approach rather than leading down the same path for every thread.

 

You have asked this exact question at least 5 times already. Please stop posting new threads. I could probably help you but as you have shown us no respect by constantly posting new threads I won't be helping at all.

 

XCode is an IDE: an Integrated Development Environment. It is not a programming language so your question makes no sense. You can use XCode to write AppleScript. If you have an AppleScript solution that will work within an XCode project.

 

Then I'd still suggest my original suggestion of shelling out to the command line system_profiler and parsing the output.