function power($x, $y) {
// Base case: If the exponent is 0, return 1
if ($y == 0) {
return 1;
}
// Recursive case: Multiply x with the result of power(x, y - 1)
return $x * power($x, $y - 1);
}
// Test cases
echo power(2, 3) . "\n"; // Outputs 8
echo power(2, 4) . "\n"; // Outputs 16
echo power(3, 2) . "\n"; // Outputs 9
echo power(3, 3) . "\n"; // Outputs 27
echo power(5, 4) . "\n"; // Outputs 625
/*
run:
8
16
9
27
625
*/