What is NULL Value in PHP define with example?

1.	What is NULL Value in PHP define with example?
Answer» 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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