这将计算从您的日期过去了多少天
$date = strtotime("2012-01-04");
$now = time();
$time = $now - $date;
$newdate = floor($time/(60*60*24));
echo $newdate . ' days ago.';
这将输出
491 days ago.
以最小的单位获取时差（为了论证，假设为秒）。
然后得到一个限制，告诉你什么时候从一个近似值过渡到下一个近似值。
例如
<?php
$appro = array(
array( 1, 'second', 60 ), // Up to 60 seconds it's seconds
array(60, 'minute', 60 ), // Divide by 60, get minutes. Up to 60 minutes is OK
array(60, 'hour', 24), // Divide by 60, get hours. Up to 24 is OK
array(24, 'day', 7), // Divide by 24, get days.
array(7, 'week', 5), // Divide by 7 to get weeks
array(30.0/7.0, 'month', 12), // Re-multiply by 7 and divide by 30: months
array(365.0/30.0, 'year', 99), // Get days again, divide by 365
);
$timediff = 366*24*3600; // Get this timediff somehow, in seconds
$ap = $timediff;
foreach($appro as $check)
{
list($scale, $name, $maximum) = $check;
$ap /= $scale;
if ($ap < $maximum)
{
print "Scale=$scale, $ap\n";
$what = $name;
switch (floor($ap))
{
case 0: $what = "less than one $name"; break;
case 1: $what = "one $name"; break;
default: $what = floor($ap) . " {$name}s"; break;
}
break;
}
}
print "This was $what ago.";
?>
当然，这会说1.5年前是“一年前”。可以修改算法，让余数乘以$scale下面的单位渲染，这样1.5年就变成了“一年零六个月”。这有时也让人有点尴尬，因为 9 天变成了“一周零两天前”。
如果近似正确，可以扩展算法并尝试在最合适的单位（上面的一个和下面的一个）中渲染一个周期，最后选择最短的形式（所以“九天”胜过“一周和两天”，“六周”胜过“一个月零两周”）。
尝试这个：
<?php
function time_since($since)
{
$chunks = array(
array(60 * 60 * 24 * 365 , 'year'),
array(60 * 60 * 24 * 30 , 'month'),
array(60 * 60 * 24 * 7, 'week'),
array(60 * 60 * 24 , 'day'),
array(60 * 60 , 'hour'),
array(60 , 'minute'),
array(1 , 'second')
);
for ($i = 0, $j = count($chunks); $i < $j; $i++) {
$seconds = $chunks[$i][0];
$name = $chunks[$i][1];
if (($count = floor($since / $seconds)) != 0) {
break;
}
}
$print = ($count == 1) ? '1 '.$name : "$count {$name}s";
return $print;
}
$DT = strtotime("2012-06-10");
echo time_since(time()-$DT);
?>
像这样的代码：
<?php
date_default_timezone_set("Europe/Tallinn");
$dates = Array(
'2012-11-30',
'2012-06-27',
'2012-03-04',
'2012-01-05',
'2012-01-04'
);
foreach ($dates as $d)
{
$unix_timestamp = strtotime($d);
//As no time set it shows time as 00:00:00, as a day beginning time
echo date("d.m.Y H:i:s", $unix_timestamp) . "<br>";
$current_unix_timestamp = time();
//Assuming all dates as in past
$diff = $current_unix_timestamp - $unix_timestamp;
echo ago($diff);
echo '<br><br>';
}
function ago($diff)
{
$second = 1;
$minute = $second * 60;
$hour = $minute * 60;
$day = $hour * 24;
$month = $day * 27.554551; //average, will not give you exact difference, but close enough
$year = $day * 365;
$ret = "";
if (floor($diff/$year)!=0)
{
$ret .= floor($diff/$year) . ' year' . (floor($diff/$year)>1?'(s)':'') . ' ';
$diff -= floor($diff/$year) * $year;
}
if (floor($diff/$month)!=0)
{
$ret .= floor($diff/$month) . ' month' . (floor($diff/$month)>1?'(s)':'') . ' ';
$diff -= floor($diff/$month) * $month;
}
if (floor($diff/$day)!=0)
{
$ret .= floor($diff/$day) . ' day' . (floor($diff/$day)>1?'(s)':'') . ' ';
$diff -= floor($diff/$day) * $day;
}
if (floor($diff/$hour)!=0)
{
$ret .= floor($diff/$hour) . ' hour' . (floor($diff/$hour)>1?'(s)':'') . ' ';
$diff -= floor($diff/$hour) * $hour;
}
if (floor($diff/$minute)!=0)
{
$ret .= floor($diff/$minute) . ' minute' . (floor($diff/$minute)>1?'(s)':'') . ' ';
$diff -= floor($diff/$minute) * $minute;
}
if (floor($diff/$second)!=0)
{
$ret .= floor($diff/$second) . ' seconds' . (floor($diff/$second)>1?'(s)':'') . ' ';
$diff -= floor($diff/$second) * $second;
}
$ret .= 'ago';
return $ret;
}
?>
将在 2013-05-09 09:29 给出这样的结果
30.11.2012 00:00:00
5 month(s) 22 day(s) 13 hour(s) 55 minute(s) 22 seconds(s) ago
27.06.2012 00:00:00
11 month(s) 13 day(s) 7 hour(s) 4 minute(s) 3 seconds(s) ago
04.03.2012 00:00:00
1 year 2 month(s) 11 day(s) 5 hour(s) 51 minute(s) 2 seconds(s) ago
05.01.2012 00:00:00
1 year 4 month(s) 15 day(s) 3 hour(s) 13 minute(s) 56 seconds(s) ago
04.01.2012 00:00:00
1 year 4 month(s) 16 day(s) 3 hour(s) 13 minute(s) 56 seconds(s) ago