<?php
function age($bMonth,$bDay,$bYear) {
 
    $cMonth = date('n');
    $cDay = date('j');
    $cYear = date('Y');
 
    if(($cMonth >= $bMonth && $cDay >= $bDay) || ($cMonth > $bMonth)) {
        return ($cYear - $bYear);
    } else {
        return ($cYear - $bYear - 1);
    }
}
?>