PHP directory traversal code

PHP directory traversal

//php directory traversal
function showDetail($dirname){
$ds = opendir($dirname);
while($file = readdir($ds) ){
$path = $dirname."/".$file;
if($file != "." && $file != ".."){ //This is a trap
if(is_dir($path) ){
showDetail($path); //Recursive call, if the directory is read, continue reading
}else{
echo $path."";
}
}
}
}
$dirname="test"; //Test a directory
showDetail($dirname);
?>

PHP