pocitadlo rokov v php

<?php
    date_default_timezone_set('UTC+2');
    $aday = getdate(mday);
    $amonth = getdate(mon);
    $ayear = getdate(year);
    $months = array( 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 );
    $admins = array(
        array(16,07,2000),
        array(07,02,1999),
        array(31,12,1998)
    );
    if($admins[0][2] % 4 == 0 && $ayear % 4 == 0){
        $months[2] = 29;
    }
    for ($i = 1; $i <= $admins[0][1]; $i++) {
    $s1 += $months[i];
    }
    for ($i = 1; $i <= $amonth; $i++) {
    $s2 += $months[i];
    }
    $v = ($s1 + $admins[0][0]) - ($s2 + $aday);
    if($admins[0][0] == $aday && $admins[0][1] == $amonth){
    $age = $year - $admins[0][2];
    if($admins[0][2] % 4 == 0 && $ayear % 4 == 0){
        $v += 366;
    }else $v += 365;
  }else $age = (ayear - $admins[0][2]) - 1;
  if($v < 0){
    $age++;
    if($admins[0][2] % 4 == 0 && $ayear % 4 == 0){
        $v += 366;
    }else $v += 365;
  }
  echo($age);