PHP implementation timeline function code

When we post on a forum, post a comment, or use a QQ space to publish a log or Weibo post a comment, the published content is displayed as "just", "5 minutes ago", and "Yesterday, instead of displaying the specific date and time directly. This article describes how to implement time conversion based on the timeline.
First, we need to understand several functions of time:
Time (): returns the current Unix timestamp.
Date (): format a local time/date.
Example:
The code is as follows:
Date ("Y-m-d H: I: s", time (); // format the current time. output: 07:27:35

Strtotime (): parses the date and time description of any English text into a Unix timestamp.
Example:
The code is as follows:
Echo strtotime ("+ 1 day"), "\ n"; // output the timestamp one day ago: 1316932222

Date_default_timezone_set (): sets the default time zone to use.
Generally, we set Beijing Time: date_default_timezone_set ("PRC ");
After understanding the above functions, let's write the timeline function:
The principle of this function is to compare the current system time with the target time to get a difference, and then compare the difference with the time range (converted to seconds, output different results (for example, 5 minutes ago) based on the time range in the timeline ). For ease of calculation, we convert all the time into Unix timestamps.
The code is as follows:
Function tranTime ($ time ){
$ Rtime = date ("m-d H: I", $ time );
$ Htime = date ("H: I", $ time );
$ Time = time ()-$ time;
If ($ time <60 ){
$ Str = 'gang ';
}
Elseif ($ time <60*60 ){
$ Min = floor ($ time/60 );
$ Str = $ min. 'minute ago ';
}
Elseif ($ time <60*60*24 ){
$ H = floor ($ time/(60*60 ));
$ Str = $ h. 'hour before '. $ htime;
}
Elseif ($ time <60*60*24*3 ){
$ D = floor ($ time/(60*60*24 ));
If ($ d = 1)
$ Str = 'Yesterday '. $ rtime;
Else
$ Str = 'day before Day'. $ rtime;
}
Else {
$ Str = $ rtime;
}
Return $ str;
}

The $ time parameter in the tranTime () function must be a Unix Timestamp. if not, use strtotime () to convert it to a Unix timestamp. The above code is clear at a glance, and you don't need to talk about it more.
Call the function and directly output the following:
The code is as follows:
$ Times = "1316932222 ";
Echo tranTime ($ times );