php寫的遞歸列出所有檔案和目錄的函數

/*
简单的目录递归函数
*/
function tree($directory)
{
$mydir=dir($directory);
echo "";
while($file=$mydir->read()){
if((is_dir("$directory/$file")) AND ($file!=".") AND ($file!="..")){
echo "$file";
tree("$directory/$file");
}else{
echo "$file";
}
}
echo "";
$mydir->close();
}
//start the program
echo "目录为粉红色";
tree(".");
?>