Euler

<?php
/*
* There may be always a better solution than this . 
* Problem : Some discussion in ipgofkerala group regarding http://bit.ly/d2ihwR ( Eulers problem http://projecteuler.net/ ) . Many of them came with C#, Clojure, Ruby, Python.. more??
* So I Just made some changes made by Sujeeth Nair in C++ to port to PHP
* I don't want PHP to miss this game :P
* Catch me at harikt.com 
* Hari K T
*/

$startTime = microtime(true);
$res = PrimeAt(10001);
$stopTime = microtime(true);
$diff = $stopTime - $startTime;
echo "Prime at 10001: $res and Milliseconds ellapsed  $diff";
 
function PrimeAt( $pos ) {
    $p = 2;
    $pos--;
    while( $pos > 0 ) {
        $p++;
        $isPrime = true; 
        $n = 2;
        for( ;$n*$n<$p+1;$n++) {
          if( ( $p % $n ) == 0 ) { 
            $isPrime=false;
            break; 
          } 
        }
        if( $isPrime == true) { 
          $pos--; 
        }
    }
    return $p;
}