| What is NULL Value in PHP define with example?
In PHP NULL is a special data type which have only one value that is NULL. NULL data type is a variable that have no value assigned. When we create a variable without assigning a value to it. Then it will assigned a value of NULL automatically. We can also do by setting value as Null.
NULL is no a case sensitive in PHP and below are the method to declared a NULL data type:-
(i)Case Sensitive
$var = NULL;
or
$var = null;
(ii)null values other facts use decrement
$x = null;
--$x; //$x is NULL no decrement
$x--; //$x is still null
$x-=1 //$ now it is -1
(iii)Use increment
$x = null;
++$x; //$x is 1
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