php友好格式化时间

php格式化时间显示

function toTime($time) {//$time必须为时间戳
    $rtime = date("Y-m-d H:i",$time);
    $htime = date("H:i",$time);
    $time = time() - $time; 

    if ($time < 60) {
        $str = '刚刚';
    }elseif ($time < 60 * 60) {
        $min = floor($time/60);
        $str = $min.'分钟前';
    }elseif ($time < 60 * 60 * 24) {
        $h = floor($time/(60*60));
        $str = $h.'小时前 ';
    }elseif ($time < 60 * 60 * 24 * 3) {
        $d = floor($time/(60*60*24));
        if($d=1)
           $str = '昨天 '.$htime;
        else
           $str = '前天 '.$htime;
    }else {
        $str = $rtime;
    }
    return $str;
}