Re: [Linux dev] Undefined variables

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...

closedir($folder); //sort file names in array sort($names); //remove any non-images from array $tempvar = $i = 0;

These "shortcircuit" assignments aren't the best of things to do...

for ($i=0;$names[$i];$i++) {    // <----- Line 14

Remember the undefined case up there, there just might not be a index 0, be rather an index "undefined" .... Don't we just *love* these interpreted languages and their "funnies" :)

I keep getting:- [Fri Sep 08 17:04:57 2006] [error] [client 127.0.0.1] PHP Notice: Undefined variable: names in C:\\Program Files\\Apache Software Foundation\\Apache2.2\\htdocs\\events\\adverts\\ridtoo.php on line 8, referer: http://localhost/events/rotate.shtml [Fri Sep 08 17:04:57 2006] [error] [client 127.0.0.1] PHP Notice: Undefined offset: 13 in C:\\Program Files\\Apache Software Foundation\\Apache2.2\\htdocs\\events\\adverts\\ridtoo.php on line 14, referer: http://localhost/events/rotate.shtml Please tell me what evil I have committed to cause this? -- Regards,

Alf Stockton            www.stockton.co.za

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