Project Euler Problem 9

Project Euler Problem 9: Find the only Pythagorean triplet, {a, b, c}, for which a + b + c = 1000.

<?php


for ($m = 2 ; ; $m++)
{
  for ($n = 1 ; $n < $m; $n++)
  {
    $a = pow($m, 2)-pow($n, 2);
    $b = 2*$m*$n;
    $c = pow($m, 2)+pow($n, 2);
    if ($a+$b+$c == 1000) break 2;
  }
}
echo $a*$b*$c;

?>