PHP validation undefined variable notice

In Ubuntu I've configured my error reporting pretty well, and I am getting notices of undefined variables when I don't submit a  valid entry to form.

To write better code what is standard for this situation?

Thanks guys you rock.
burnedfacelessAsked:
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Ray PaseurCommented:
My recommendation is to test the variable with empty() before you do any other validation tests.  If empty() returns true, you can substitute a default value.  For example if your script expects to receive an integer, you can do something like the example below.

I like to have a validation class with one method for each external variable.  That way it's not likely that any external variables will slip through the cracks!

Examples:
http://iconoun.com/demo/temp_burnedfaceless.php?q=3
http://iconoun.com/demo/temp_burnedfaceless.php
http://iconoun.com/demo/temp_burnedfaceless.php?q=Oops
<?php // demo/temp_burnedfaceless.php
/**
 * http://www.experts-exchange.com/questions/28705822/PHP-validation-undefined-variable-notice.html
 */
error_reporting(E_ALL);

// EXPECTING AN INTEGER FOR "q=" VALUE
$q
= !empty($_GET['q'])
? (int)$_GET['q']
: 0
;

echo "THE VALUE OF 'q=' IS $q";

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burnedfacelessAuthor Commented:
Ray you are a gentleman and a scholar.
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Ray PaseurCommented:
@burnedFaceless: You must have very low standards :-)

Thanks for the points and thanks for using E-E; it's a great question - one more programmers should be asking!
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