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@haqu
Created September 6, 2009 01:17
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relative date
<?
# relative_date
# usage: relative_date("2009-09-09 9:09:09") => "9 minutes ago"
# just now, 25 seconds ago... yesterday, 5 days ago, 3 months ago
function pluralize($count,$word) {
if($count == 0) {
return "no ".$word."s";
} else if($count == 1) {
return "1 ".$word;
} else {
return floor($count)." ".$word."s";
}
}
function date_diff($interval, $date1, $date2) {
$date1 = strtotime($date1);
$date2 = strtotime($date2);
$seconds = $date2 - $date1;
if ($seconds < 0) {
$tmp = $date1;
$date1 = $date2;
$date2 = $tmp;
$seconds = 0-$seconds;
}
if ($interval =='y' || $interval=='m') {
$date1 = date("Y-m-d h:i:s", $date1);
$date2= date("Y-m-d h:i:s", $date2);
}
switch($interval) {
case "y":
list($year1, $month1, $day1) = split('-', $date1);
list($year2, $month2, $day2) = split('-', $date2);
$time1 = (date('H',$date1)*3600) + (date('i',$date1)*60) + (date('s',$date1));
$time2 = (date('H',$date2)*3600) + (date('i',$date2)*60) + (date('s',$date2));
$diff = $year2 - $year1;
if($month1 > $month2) {
$diff -= 1;
} elseif($month1 == $month2) {
if($day1 > $day2) {
$diff -= 1;
} elseif($day1 == $day2) {
if($time1 > $time2) {
$diff -= 1;
}
}
}
break;
case "m":
list($year1, $month1, $day1) = split('-', $date1);
list($year2, $month2, $day2) = split('-',$date2);
$time1 = (date('H',$date1)*3600) + (date('i',$date1)*60) + (date('s',$date1));
$time2 = (date('H',$date2)*3600) + (date('i',$date2)*60) + (date('s',$date2));
$diff = ($year2 * 12 + $month2) - ($year1 * 12 + $month1);
if($day1 > $day2) {
$diff -= 1;
} elseif($day1 == $day2) {
if($time1 > $time2) {
$diff -= 1;
}
}
break;
case "w":
$diff = floor($seconds / 604800);
break;
case "d":
$diff = floor($seconds / 86400);
break;
case "h":
$diff = floor($seconds / 3600);
break;
case "i":
$diff = floor($seconds / 60);
break;
case "s":
$diff = $seconds;
break;
}
return $diff;
}
function relative_date($date_added) {
$now = date('Y-m-d H:i:s');
$hours_ago = date_diff('h',$now,$date_added);
if($hours_ago<1) {
$min_ago = date_diff('i',$now,$date_added);
if($min_ago < 1) {
$sec_ago = date_diff('s',$now,$date_added);
if($sec_ago < 1) {
$ago = "just now";
} else {
$ago = pluralize($sec_ago,"second")." ago";
}
} else {
$ago = pluralize($min_ago,"minute")." ago";
}
} elseif($hours_ago>743) {
$months_ago = date_diff('m',$now,$date_added);
$ago = pluralize($months_ago,"month")." ago";
} elseif($hours_ago>23) {
$days_ago = date_diff('d',$now,$date_added);
if($days_ago == 1) {
$ago = "yesterday";
} else {
$ago = $days_ago." days ago";
}
} else {
$ago = pluralize($hours_ago,"hour")." ago";
}
return $ago;
}
?>
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