Jason Barnett wrote:
Actually, thanks for pointing out this function to me because I never
even knew that it existed. You learn something new every day.
I have to admit that a warning seems a little unusual given that an
undefined variable would result in only an E_NOTICE. Especially since
the default behavior for an undefined constant (anywhere except for this
function) is an E_NOTICE. Seems like you may have found a bug to report.
<?php
/* Causes E_WARNING */
echo constant(UNDEFINED_CONSTANT);
The above is wrong, use:
echo constant('UNDEFINED_CONSTANT');
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