How to destroy the specified variables in PHP

Unset() method is used to unset a given variable.
Unset() destroy the specified variables.

Syntax

void unset(mixed $var[,mixed $var…])

Example

<?php
$xyz=’Jaldip’;
echo ‘Before using unset() the values of $xyz is : ’. $xyz.’<br>’;
unset($xyz);
echo ‘After using unset() the value of $xyz is : ’. $xyz;
?>