我用它来生成我的twitter提要：
# Access as an object
$tweetText = $tweet->text;
$tweetDate = $tweet->created_at;
# Make links active
$tweetText = preg_replace("/(http:'/'/|www.)(([^'s<]{4,68})[^'s<]*)/", '<a href="http://$2$3" target="_blank">$1$2$4</a>', $tweetText);
# Linkify user mentions
$tweetText = preg_replace("/@(w+)/", '<a href="http://www.twitter.com/$1" target="_blank">@$1</a>', $tweetText);
# Linkify tags
$tweetText = preg_replace("/#(w+)/", '<a href="http://search.twitter.com/search?q=$1" target="_blank">#$1</a>', $tweetText);
# Output
echo $tweetText;
echo '<br><span>Posted: ';
echo $tweetDate;
echo '</span>';
echo '<br> <br>';
它目前显示推文发布的日期，有没有办法显示推文是多久前发布的，例如4小时前而不是日期？
$tweetDate当前打印Tue Apr 29 09:43:17 +0000 2014
使用以下代码：
$tweetDate = strtotime($tweetDate);
$diff = time()-$tweetDate;
if($diff<60){
echo $diff." sec ago";
}else if($diff<(60*60)){
echo round($diff/60)." minute ago";
}else if($diff<(60*60*24)){
echo round($diff/(60*60))." hours ago";
}else{
echo round($diff/(60*60*24))." days ago";
}