Write a program to swap two numbers using PHP.

                                        
Without using third variable

<?php echo "Before Swapping:";

$a = 1;

$b = 2;

echo "a = $a<br>";

echo "b = $b<br>";



echo "After swapping:<br>";



$a = $a + $b;

$b = $a - $b;

$a = $a - $b;

echo "a = $a<br>";

echo "b = $b";

?>

With using third variable

<?php echo "Before Swapping:<br>";

$a = 1;

$b = 2;

echo "a = $a<br>";

echo "b = $b<br>";



echo "After swapping:<br>";

$temp = $a;

$a = $b;

$b = $temp;



echo "a = $a<br>";

echo "b = $b<br>";

?>