PHP implementation of timeline function code_PHP tutorial

This article will introduce 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.
Application example:

Copy code The code is as follows:

date("Y-m-d H:i:s",time ()); //Format the current time, output: 2011-9-24 07:27:35

strtotime(): Parse the date and time description of any English text into a Unix timestamp.
Application example:

Copy code The code is as follows:

echo strtotime("+1 day"), "n "; //Output the timestamp 1 day ago: 1316932222

date_default_timezone_set(): Set the default time zone to be used.
Generally we set Beijing time: date_default_timezone_set("PRC");
After understanding the above functions, we can write the timeline function:
The principle of this function is to compare the current system time with the target time, and get A difference value, and then compare the difference value with the time range (converted into seconds), and output different results according to the range of the time axis (for example: 5 minutes ago). For ease of calculation, we convert the times into Unix timestamps.

Copy code 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 $str = 'just';
}
elseif ($time $min = floor($time/60);
$str = $ min.'minutes ago';
}
elseif ($time $h = floor($time/(60*60));
$str = $h.'hours ago'.$htime;
}
elseif ($time $d = floor($time/(60*60* 24));
if($d==1)
$str = 'yesterday'.$rtime;
else
$str = 'the day before yesterday'.$rtime;
}
else {
$str = $rtime;
}
return $str;
}

The parameter $time in function tranTime() must be Unix time Stamp, if not, please use strtotime() to convert it to a Unix timestamp first. The above code is easy to understand at a glance, so there is no need to elaborate further.
Call the function and output directly:

Copy the code The code is as follows:

$times="1316932222";
echo tranTime($times);

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