isset empty
Returnstrueifvardoesnotexistorhasavaluethatisemptyorequaltozero,akafalsey,seeconversiontoboolean.Otherwisereturnsfalse.Examples¶.,Ifavariablehasbeenunsetwiththeunset()function,itisnolongerconsideredtobeset.isset()willreturnfalsewhencheckingavaria...
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Ifavariablehasbeenunsetwiththeunset()function,itisnolongerconsideredtobeset.isset()willreturnfalsewhencheckingavariablethathasbeen ...
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