我有这段代码，它将从站点上的文件夹（平面目录）中提取信息，并将生成一个文件列表，以便使用 php 下载。它查看文件名的前两个字符，并基于此“前缀”为每个部分创建一个月份标题。这使它看起来不是“平坦的”。
它工作得很好，但我需要它把最新的文件放在顶部而不是底部。我可以通过重新排列数组键轻松更改标题的顺序。
我将不胜感激有关如何执行此操作的建议。这是代码：
<?php
$prevgroupprefix = '';
if ($handle = opendir('bulletin')) {
while (false !== ($file = readdir($handle))) {
if ($file != "." && $file != "..") {
$groupprefix = substr($file,0,2);
$period = strrpos($file, ".");
$filepath = "bulletin/" . $file;
$file = substr($file,0,$period);
if ($groupprefix <> $prevgroupprefix){
$title = "$groupprefix Weekly Bulletins";
$month = array(
"01" => "January",
"02" => "February",
"03" => "March",
"04" => "April",
"05" => "May",
"06" => "June",
"07" => "July",
"08" => "August",
"09" => "September",
"10" => "October",
"11" => "November",
"12" => "December"
);
Switch($groupprefix)
{
Case "01":
$title = "<div id='bulletinmonth'>$groupprefix - $month[01]</div>";
break;
Case "02":
$title = "<div id='bulletinmonth'>$groupprefix - $month[02]</div>";
break;
Case "03":
$title = "<div id='bulletinmonth'>$groupprefix - $month[03]</div>";
break;
Case "04":
$title = "<div id='bulletinmonth'>$groupprefix - $month[04]</div>";
break;
Case "05":
$title = "<div id='bulletinmonth'>$groupprefix - $month[05]</div>";
break;
Case "06":
$title = "<div id='bulletinmonth'>$groupprefix - $month[06]</div>";
break;
Case "07":
$title = "<div id='bulletinmonth'>$groupprefix - $month[07]</div>";
break;
Case "08":
$title = "<div id='bulletinmonth'>$groupprefix - $month[08]</div>";
break;
Case "09":
$title = "<div id='bulletinmonth'>$groupprefix - $month[09]</div>";
break;
Case "10":
$title = "<div id='bulletinmonth'>$groupprefix - $month[10]</div>";
break;
Case "11":
$title = "<div id='bulletinmonth'>$groupprefix - $month[11]</div>";
break;
Case "12":
$title = "<div id='bulletinmonth'>$groupprefix - $month[12]</div>";
break;
Case ".D":
$title = "";
break;
}
echo "<tr><td higth='50%'> </td><td> </td><td> </td></tr>";
echo "<tr><td> </td><td> $title </td><td> </td></tr>";
}
echo "<div id='bulletinbody'><ul><li><a href='$filepath'target='_blank'> $file </a></li></ul></div>";
$prevgroupprefix = $groupprefix;
}
}
closedir($handle);
}
?>