การปัดเศษทศนิยมตำแหน่งที่2 (ลง)

<?php
$number = 83.3259;

echo $number.'<BR>’;

$number1 = $number*100;
$number2 = floor($number1);
$number = $number2/100;

echo $number;

?>

===========================

83.3259

83.32