我有一些字符串，如＆＃34; 3天前＆＃34;，＆＃34; 6小时前＆＃34;，＆＃34; 9分钟前＆＃34;，＆＃34; 12秒前＆＃ 34 ;.我是正则表达式的新手，所以我不确定如何匹配＆＃34; s＆＃34;之前＆＃34;前＆＃34;所以如果需要我可以把它剥掉。
修改：我的代码，以防它可以帮助其他人......
function timeAgo ($timestamp) {
$difference = time() - strtotime($timestamp);
if ($difference > (60*60*24)) {
$difference = round($difference/60/60/24) . " days ago";
}
else if ($difference > (60*60)) {
$difference = round($difference/60/60) . " hours ago";
}
else if ($difference > 60) {
$difference = round($difference/60) . " minutes ago";
}
else if ($difference > 0) {
$difference = $difference . " seconds ago";
}
$int = filter_var($difference, FILTER_SANITIZE_NUMBER_INT);
if ($int == 1) {
$difference = preg_replace('/.(?= ago)/', '', $difference);
}
return $difference;
}