Re: [Linux dev] Undefined variables

Alf Stockton wrote:

Hendrik Visage wrote:

On 9/8/06, Alf Stockton <alf@stockton.co.za> wrote:

In this little script:- <?php session_start(); //read folder $folder=opendir("."); while ($file = readdir($folder)) $names[count($names)] = $file; // <----- Line 8

Obviously $names won't be defined in the initial state the first time this line is hit, thus count($names) would/should be undefined...

Interesting that this works on versions of Windows PHP previous to 5.1.6 Maybe undefined has a meaningful count value in previous versions?

Anyhow - using variable before they are defined is kind of bad. We try to avoid it. In the above case TPN coding practice would have been to put a line: $names=array(); before the loop. This makes everything very explicit and stable. Cheers AJ -- www.deployview.com www.nerds-central.com www.project-network.com