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Understanding NULL In PHP

Sep 25, 2015

NUll is a datatype as well as value in PHP. Various freshers thinks that Null means empty but null doesn't means zero or empty.It have two meanings: (1)Irrelevant (2)Unknown Let us understand it through program <?php $a; echo $a; echo "<br/>"; //gettype() is a predefined function used to know datatype of variable passed in it. echo gettype($a); ?>

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