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PHP includes & requires

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May 26.2004

Hey, I’m quite new to PHP, and I’m only using it for includes & getting current date and that kinda stuff. I prefer to use HTML. It’s easier ?

Anyway, on some sites, you see something like

[url]www.site.com/index.php?page=3[/url]

and such, where you don’t actually have to change the page you’re viewing; only which file is included at a given point. Could anyone explain how this works and how to do it for me? Thank you.

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@chrisranjanaMay 26.2004 — www.site.com/index.php?page=3

page=3 is called query string

where page is the name and 3 is the value
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@AdamGundryMay 26.2004 — The basic code would look something roughly like this:

[code=php]require $_GET['page'] . '.txt';[/code]

Then loading (for example) index.php?page=3 would contain the content of the file '3.txt'. Be aware there can be _major_ security issues with this if you don't validate the passed value properly - for example, a cracker could gain access to hidden files on your server.

Adam
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@LotusauthorMay 28.2004 — Thanx dude, think I get it now... But one more thing, how do I change this value dynamically when e.g. the user clicks a link in a menu? You know, if I only want to change one specific include?
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@AdamGundryMay 28.2004 — You simply link to the current page, with a different query string. For example, you could link to "index.php?page=2" and get different content after the page refreshes. To change the content without a refresh is more difficult and requires either frames or JavaScript, neither of which are good solutions.

Adam
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