Traverse the file directory and return all file names in the directory using the path as the key value.

Array
(
[C:/testnice] => Array
([0] => New text document.txt)

[C:/testnice copy nice] => Array
( )

[C:/testnice copy nice copy nice] => Array
([0] => New text document.txt)

[C:/test copy (2) nice] => Array
([0] => New text document.txt)
)

function read_dir_test(& $fileArr, $dir) {
 if (!$dir) {
 return null;
 }
 $dirHandle = opendir($dir);
 while ($entry = readdir($dirHandle) ) {
 if ($entry != '.' && $entry != '..') {
 if (is_dir($dir . DIRECTORY_SEPARATOR . $entry)) {
 $fileArr[$dir . DIRECTORY_SEPARATOR . $entry] = array();
 $fileArr = array_merge($fileArr, read_dir_test($fileArr[$dir . DIRECTORY_SEPARATOR . $entry], $dir . DIRECTORY_SEPARATOR . $entry));
 } else {
 $fileArr[$dir][ ] = $entry;
 }
 }
 }
 return $fileArr;
}

$fileArr = array();
$dir = "C:/test";
read_dir_test($fileArr, $dir);
print_r ($fileArr);