Importing an external page to extract information out of it

[pdedecker]

I want to import an external page somewhere on the internet so that I can extract information out of it. For example: I want to display the current Firefox version number. If I'd like to do that I'd have to import the page HTML into a string, trim the page to get the right information and then echo() it. The thing is, I don't know if and how it's possible to do that using PHP code. Can somebody help me out?

[notclive]

It's done like this

<?php //get download page of firefox website$page=file_get_contents("http://www.mozilla.org/download.html");//find the position of the below string on the page and add the length of the string$start=strpos($page,'<dt><a href="http://www.mozilla.com/firefox/">Firefox ')+54;//echo the next 7 characters after the position of the above stringecho 'The latest FireFox version is '.substr($page,$start,7);?>

you can see the output herethe problem is if mozzilla changed their page it might stop working.If theres anything in my code you dont understand just ask.