Open file and write to other file

Question

I need files and write their content to other file. Any ideas how to do it?

I tried the following, but it's not working, the output was only from 1 file not from all

$files = glob('texts/*.txt', GLOB_BRACE);
foreach($files as $file){
  $opn = fopen($file, "r");
  $rad = fread($opn, 1024000);
  fclose($opn);
  $opn = fopen('output.txt', 'a');
  fwrite($opn, $rad);
  fclose($opn);
}

Answer 1

I solved the problem:

$filesss = fopen('output.txt', 'a');
if ($handle = opendir('./texts/')) {
    while (false !== ($entry = readdir($handle))) {
        if ($entry != "." && $entry != "..") {
            $obsah = file_get_contents('./texts/'.$entry);
            fwrite($filesss, $entry.$obsah.'
');
        }
    }
    closedir($handle);
}
fclose($filesss);

Not be best solution, but for me just. Thansk :)