How do I check for the presence of an optional $_GET param without throwing a "Notice: Undefined index" when the param is not present?
Tried all three of these, they all produce the Notice when the param is not passed:
if ($_GET['id']) if ($_GET['id'] != "") if (isset $_GET['id'])
if (@$_GET['id'])
http://www.php.net/manual/en/language.operators.errorcontrol.php
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