php简单计算年龄的方法(周岁与虚岁)

/**
* $date是时间戳
* $type为1的时候是虚岁,2的时候是周岁
*/
function getagebybirth($date,$type = 1){
   $nowyear = date("y",time());
   $nowmonth = date("m",time());
   $nowday = date("d",time());
   $birthyear = date("y",$date);
   $birthmonth = date("m",$date);
   $birthday = date("d",$date);
   if($type == 1){
    $age = $nowyear - ($birthyear - 1);
   }else{$type == 2}{
    if($nowmonth<$birthmonth){
     $age = $nowyear - $birthyear - 1;
    }elseif($nowmonth==$birthmonth){
     if($nowday<$birthday){
      $age = $nowyear - $birthyear - 1;
     }else{
      $age = $nowyear - $birthyear;
     }
    }else{
     $age = $nowyear - $birthyear;
    }
   }
   return $age;
}