获取发布离现在的时间函数
所传参数$time必须是Unix时间戳；
如果格式为：2015-11-11 23:59:59 这个格式，请用PHP内置函数strtotime()；进行转换再传参。
/**
+----------------------------------------------------------
* 功能：获取时间差
+----------------------------------------------------------
* @param int $time
+----------------------------------------------------------
* @return string 时间差值
+----------------------------------------------------------
*/
function tranTime($time) {
$rtime = date("m-d H:i",$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 = $h.'小时前 '.$htime;
}
elseif ($time < 60 * 60 * 24 * 3) {
$d = floor($time/(60*60*24));
if($d==1)
$str = '昨天 '.$rtime;
else
$str = '前天 '.$rtime;
}
else {
$str = $rtime;
}
return $str;
}