Error notices question

[Guest]

Hi,

My php (development) website code now all works as it should, and tests on the database are all producing the correct results, however after setting error_reporting to show all errors I have several instances of :

Notice: undefined constant...

Notice: undefined variable...

Notice: undefined index...

I am aware that I can set error_reporting to not display any notices however my concern is that my code is secure.

How important are these notices with regards to a secure php website? any information would be greatly appreciated, I don't want to ignore any important security issues before going live.

Thank you in advance for your time.

[Ben M · Accepted solution]

Those are good to get rid of.  Show All isn't normally what's shown, but those errors mean that you have not tested whether or not the variables are set ( php isset - http://php.net/manual/en/function.isset.php ).  It's always good when writing scripts to make sure the variables are set before trying to use them in code.  Just a simple:

if ( isset( $var ) )

will do the trick.

[Guest]

Thank you SnakEyez02, working through my code now correcting.