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<?
//Pi calculation code
function bcpi ( $precision ){
$num = 0 ; $k = 0 ;
bcscale ( $precision + 3 );
$limit = ( $precision + 3 )/ 14 ;
$k < $limit ){
$num = bcadd ( $num , bcdiv ( bcmul ( bcadd ( '13591409' , bcmul ( '545140134' , $k )), bcmul ( bcpow (- 1 , $k ), bcfact ( 6 * $k ))), bcmul ( bcmul ( bcpow ( '640320' , 3 * $k + 1 ), bcsqrt ( '640320' )), bcmul ( bcfact ( 3 * $k ), bcpow ( bcfact ( $k ), 3 )))));
$k ;
bcdiv ( 1 ,( bcmul ( 12 ,( $num ))), $precision );
bcfact ( $n ){
$n == 0 || $n == 1 ) ? 1 : bcmul ( $n , bcfact ( $n - 1 ));
?>
echo bcpi(30);
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