DoB

<?php
    $dob=$patData[pat_birth];
        list($BirthYear,$BirthMonth,$BirthDay) = explode("-", $dob);
        // Find the differences
        $YearDiff = date("Y") - $BirthYear;
         //echo $YearDiff;
        $MonthDiff = date("m") - $BirthMonth;

        //echo $MonthDiff;
        $DayDiff = date("d") - $BirthDay;
        // If the birthday has not occured this year
        if ($DayDiff < 0 || $MonthDiff < 0)
          $YearDiff--;
        if($MonthDiff<0)$MonthDiff+=12;
        $age= "$YearDiff Tahun $MonthDiff Bulan";