undefined variable problem

[osusano]

i dont know whats wrong with this script.

on my local webserver i dont get any problem or error but when i upload it on the online webserver it give me an error like this

Notice: Undefined variable: fLevel in /home/html/main.php on line 13

if just put this on my line 13
if($fLevel == ''){ $fLevel = '0';}

what do u think would be the problem with this?

should i recompil the PHP?

[andrewtayloruk]

It's down to your php.ini warning level settings. Try defining the variable before you access it or (as below) checking with a function that will determine if the variable exists or not.

if(empty($fLevel) || $fLevel == '') { $fLevel = '0'; }

I've summised this is what you want to do, make sure you understand what I've written and make sure it applies to your situation.

[osusano]

what particular settings in PHP.INI should i change to make this work?

[andrewtayloruk]

I always develop with errors turned on and showing all levels including notice, I believe it helps me write better code.

You can turn it off on a per page basis or in PHP.INI, if you open your PHP.INI file up you'll see what you need to change. Also read this section of the manual, http://uk2.php.net/manual/en/ref.errorfunc.php.

If you've finished developing and this is a live site, should not just turn off errors altogether and allow your error handling routines to report?

HTH

Andrew

[laserlight]

You could change
a) register_globals to On
b) error_reporting to E_ALL&~E_NOTICE
c) your script to handle incoming variables and other potentially undefined variables.

(c) is preferable.
In a production environment, do a variant of (b) that sets display_errors to Off and error_reporting to 0
But in development stage, set error_reporting to E_ALL (as probably is your current setting), and definitely set display_errors to On.

[osusano]

my register global is currently on.

[laserlight]

Originally posted by osusano
my register global is currently on.

Ah, so $fLevel is not an incoming variable, is it?

Where is $fLevel coming from?

[osusano]

basically $fLevel is just define

coz there is another $UID on top which is assigned to cookie but even if i alread put it on cookie it always shows the error.

i dont know the reason why. coz i even uploaded the script from another webserver and it works fine without any error..

or maybe it bcoz of the version of PHP?

the webserver that shows the script correctly is on version 3.4.9 while the version that shows an error is in version 3.4.10

[andrewtayloruk]

As posted earlier by myself and others, the variable doesn't exist. You are saying

if($variable = '') $variable = 0;

But 'variable' doesn't exist.

A better way to do this is to say

if(empty($variable)) $variable = 0;

or

if(!isset($variable)) $variable = 0;

Depending on your php.ini PHP will report instances like this or will hide them, this particular problem is classified as a 'notice'. This means that your script will still work (Unless you make use of header() further in the script) but strictly speaking is not correct.

Either change your code, change your php.ini or change the level of error logging on each page.

There is nothing complex about this problem.

Andrew