Простой скрипт создания файла с путем к другому файлу

/media/usbstick2/Music/Trance/Omnia, Everything By Electricity - Bones feat. Everything By Electricity (Original Mix).mp3

$dir = "/media/usbstick2/Music/Trance/";
$files = scandir($dir);
 
$filename = 'content.txt';
 
if (!$handle = fopen($filename, 'w')) {
    echo "Не могу открыть файл ($filename)";
    exit;
}
 
$content = "";
foreach($files as $file) {
 $content .= $dir . $file . "\n";
}
 
if (fwrite($handle, $content) === FALSE) {
    echo "Не могу произвести запись в файл ($filename)";
    exit;
}
 
fclose($handle);

$dir = "/media/usbstick2/Music/Trance/";

$content = "";
foreach($files as $file) {
 if(end(explode(".", $file)) == "exe")
    $content .= $dir . $file . "\n";
}

$dir = __DIR__ . "/";

PHP Warning: scandir(__DIR__/) [0function.scandir0]: failed to open dir: Invalid argument in C:\SERVER\shttps\www\find.php on line 3 PHP Warning: scandir() [0function.scandir0]: (errno 2): No such file or directory in C:\SERVER\shttps\www\find.php on line 3 PHP Warning: Invalid argument supplied for foreach() in C:\SERVER\shttps\www\find.php on line 13

$dir = dirname(__FILE__) . "/";

C:\SERVER\shttps\www/dddf.txt
C:\SERVER\shttps\www/ffd322222.txt
C:\SERVER\shttps\www/Текстовый документ (2).txt
C:\SERVER\shttps\www/Текстовый документ.txt