14. Swap using third var.php

/* 14.Swap two number using third variable program in PHP */

<?php 

$a=10; 
$b=20; 

echo "Value of a: $a</br>";
echo "Value of b: $b</br>";

$temp=$a; 
$a=$b; $b=$temp;

echo "Value of a: $a</br>";
echo "Value of b: $b</br>"; 

?>