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I haven't been on the forum in quite a while so haven't asked a dumb question which probably catagorizes the following: Within the error management section of the book there is the following code: if (!LIVE ) { // Development (print the error). // Show the error message: echo '<div class="error">' . nl2br($message); // Add the variables and a backtrace: echo '<pre>' . print_r ($e_vars, 1) . "\n"; debug_print_backtrace(); echo '</pre></div>'; etc.... } This will give all errors and notices including undefined variables. I do want the undefined variable notices EXCEPT if they are included in an if (isset ()) conditional, which I don't care about. So, if (!LIVE && ($e_number != E_NOTICE) )} won't work because it won't point out $thisVar if it is not defined. Is there a way to shield the "isset" qualified variables.