function Power3($A, $B)
{
$var = ceil($B);
if ($var === $B) {
$result = Power1($A, $B);
} else {
$result = Power2($A, $B);
}
return $result;
}
<?php
/**
* Write a real-valued function Power1(A, B) that returns the power AB
* calculated by the formula AB = exp(B·ln(A)) (A and B are real-valued
* parameters). In the case of zero-valued or negative parameter A the function
* returns 0. Having input real numbers P, A, B, C and using this function,
* find the powers AP, BP, CP.
*/
function Power1($A, $B)
{
if ($A <= 0) {
$AB = 0;
return $AB;
}
$AB = exp($B * log($A));
return $AB;
}
$P = 4;
$A = 5;
$B = 6;
$C = -2;
echo 'the power AB is : ' . Power1($A, $P) . " when A is :" . $A . ' and B is : ' . $P . '<br/>';
echo 'the power AB is : ' . Power1($B, $P) . " when A is :" . $B . ' and B is : ' . $P . '<br/>';
echo 'the power AB is : ' . Power1($C, $P) . " when A is :" . $C . ' and B is : ' . $P . '<br/>';
