Manuale PHP
Indietro	Capitolo 11. Types	Avanti

NULL

The special NULL value represents that a variable has no value. NULL is the only possible value of type NULL.

Nota: The null type was introduced in PHP 4.

A variable is considered to be NULL if

Syntax

There is only one value of type NULL, and that is the case-insensitive keyword NULL.


<?php
$var = NULL;       
?>

Indietro	Partenza	Avanti
Resource	Risali	Pseudo-types used in this documentation