根据时间戳计算年龄

/**
    * $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);
        }
        if($type == 2){
            if($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;
     }