<?php
$a = 10;
$b = 5;
// Addition
$result = $a + $b;
echo "Addition: $result <br>";
// Subtraction
$result = $a - $b;
echo "Subtraction: $result <br>";
// Multiplication
$result = $a * $b;
echo "Multiplication: $result <br>";
// Division
$result = $a / $b;
echo "Division: $result <br>";
// Modulus
$result = $a % $b;
echo "Modulus: $result <br>";
// Exponentiation
$result = $a ** $b;
echo "Exponentiation: $result <br>";
?>Addition: 15
Subtraction: 5
Multiplication: 50
Division: 2
Modulus: 0
Exponentiation: 100000$a` and `$b` and assigned them the values `10` and `5`, respectively. $result` variable. Finally, we print out the results using the `echo` statement.