pTutorial

New way to learn PHP function

PHP unset() function

Syntax

unset($variable, $variable, ...);

Parameter Description
Variable One variable (required)

Definition

It returns true when successfully destroy the given variable.

Usage

unset function is used to destroy or delete one or more variable.


Note:

You can also use unset function to destroy the array variable.

You can use unset function to destroy the object.

Example of unset() function

<?php

$Name = 'ptutorial';
echo '
'; echo $Name; unset($Name); ?>

Output


ptutorial

$Name is a string variable that hold the ptutorial and print the variable.

And after use unset the $name variable. You cannot use the variable after unset.

Check variable is unset or not

<?php

$Name = 'ptutorial';
var_dump( isset($Name) );
unset($Name);
var_dump( isset($Name) );


?>
 

Output

bool(true) bool(false)

Before unset it return true and after unset it return false.

QUOTES OF THE DAY

Knowledge itself is a power.

LIKE ON FACEBOOK

+1 ON GOOGLE

SHARE ON TWITTER