1.

Write a program to swap two numbers using PHP.

Answer»

We have to use the bellow mentioned syntax to swap TWO number using PHP, with or without using the third variable.

Example Without using third variable

<?php ECHO "Before Swapping:";
$a = 1;
$B = 2;
echo "a = $a<br&GT;";
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>";
?>


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