一个目录类

<?
//目录操作基类
class FileDirectory {
var $servermode;
var $serverpath;    //web服务器目录
var $pagepath;    //当前页目录
var $path;        //当前目录
var $ffblk;        //用于存储有关文件的信息
function FileDirectory() {
set_time_limit(0);    //设置网页运行时间，0不限
$this->serverpath = $GLOBALS[DOCUMENT_ROOT]."/";
$this->path = $this->pagepath = dirname(eregi_replace("//","/",$GLOBALS[SCRIPT_FILENAME]))."/";
if(eregi("Win32",getenv("SERVER_SOFTWARE")))
$this->servermode = "WIN32";
}
function first_dir() {
return dirname(eregi_replace("//","/",$GLOBALS[SCRIPT_FILENAME]));
}
//获取文件信息
function file_info($filename) {
$ar[name] = $filename;
$ar[type] = filetype($filename);
$ar[read] = is_readable($filename);
$ar[write] = is_writeable($filename);
$ar[exec] = is_executable($filename);
$ar[time] = date("Y-m-d H:i:s",filemtime($filename));
$ar[size] = filesize($filename);
$ar[style] = ($ar[type]=="dir"?"d":"-")
.($ar[read]?"r":"-")
.($ar[write]?"w":"-")
.($ar[exec]?"x":"-");
return $ar;
}

function format_path($path){
$tar = split("/",$path);
$sar = split("/",$this->path);
$t = count($tar);
$s = count($sar);
if($tar[$t-1] == "") $t--;
if($sar[$s-1] == "") $s--;
$j = 0;
while($tar[$j] == "..") {
$j++;
$s--;
}
$p = "";
for($i=0;$i<$s;$i++)
$p .= $sar[$i]."/";
for($i=$j;$i<$t;$i++)
if($tar[$i] != ".")
$p .= $tar[$i]."/";
$this->path = $p;
}
//获取目录信息到数组,成功返回时$this->path为目录的全路径
function array_dir($pathname=".") {
$old = $this->path;
if($this->servermode == "WIN32")
$path = str_replace("","/",$pathname);
else
$path = $pathname;
$this->format_path($path);
if(! ($handle = @opendir($path))) {
$path = dirname($pathname);
$handle = opendir($path);
}
if(@chdir($this->path)) {
while ($file = readdir($handle)) {
$ar[] = $this->file_info($file);
}
}else
$this->path = $old;
closedir($handle);
return $ar;
}
}    //FileDirectory定义结束

?>

<?
//目录对话框
class OpenFileDialog extends FileDirectory {
var $filter = array("*.*");
function Execute($path,$statpath) {
if($path != "") {
chdir($statpath);
$this->path = $statpath;
$ar = $this->array_dir($path);
}else
$ar = $this->array_dir(".");
array_multisort($ar);
echo "
<style>
td{font-size:9pt;}
select{font-size:9pt;}
#box{border:3px outset #ffffff}
</style>
<form action=";
echo $GLOBALS[PHP_SELF];
echo " method=POST>
<table bgcolor=#cccccc cellspacing=0 cellpadding=0>
<tr><td>
<table border=0 id=box>
<tr><td>
";
echo "当前路径 ".$this->path."<br>n";
echo "<input type=hidden name=statpath value="".$this->path."">n";

echo "<select name=dirlist size=6 style="width:100px" onChange="this.form.submit()">n";
for($i=0;$i<count($ar);$i++)
if($ar[$i][type] == "dir")
if($ar[$i][name] == ".")
echo "<option selected>".$ar[$i][name]."n";
else
echo "<option>".$ar[$i][name]."n";
echo "</select>  n";
echo "<select size=6 style="width:100px">n";
for($i=0;$i<count($ar);$i++)
if($ar[$i][type] == "file")
echo "<option>".$ar[$i][name]."n";
echo "
</select>
</td></tr>
</table>
</td></tr>
</table>
</form>
";
}
}    //OpenFileDialog
?>

<?
//测试

$dir = new OpenFileDialog();
echo "服务器类型 ".$dir->servermode."<br>";
echo "服务器路径 ".$dir->serverpath."<br>";
echo "当前页路径 ".$dir->pagepath."<br>";
echo "当前路径 ".$dir->path."<br>";
$dir->Execute($dirlist,$statpath);
?>