Re: Question about functions

Jason Pruim wrote:

Hi everyone! So, I'm trying to learn about functions, and I think I understand what to use them for... And one of the ideas I had was to write a function to logout of an application. The question I have though, is how do I call it? Right now I just have a link like this: <A href="logout.php">Click here to logout</A> Can I do the same thing with a function? And if so, then maybe I don't really understand functions like I thought I did... Because to me, that would look like it would be just the same as calling a single script to logout vs. a function? -- Jason Pruim Raoset Inc. Technology Manager MQC Specialist 3251 132nd ave Holland, MI, 49424 www.raoset.com japruim@raoset.com

Functions basically save you repeating code; for example, let's say we have these lines of code in 10 scripts on our website: if(isset($_GET['pageid']) && trim($_GET['pageid'])) { $pageid = trim($_GET['pageid']); } else { $pageid = '1'; } you could wrap this code up in a function as such: function get_pageid() { if(isset($_GET['pageid']) && trim($_GET['pageid'])) { $pageid = trim($_GET['pageid']); } else { $pageid = '1'; } return $pageid; } save that function (along with other functions you've made) in an php file (example: myfunctions.php) then in every script we simply include our functions file and call our function(s) as and when we need them: scripta.php: <?php include 'myfunctions.php'; $pageid = get_pageid(); //more code ?> I'm no technical writer but I think that about sums it up. Nathan