How can PHP developers effectively exclude multiple files from an array generated using glob by utilizing Zeichenklassen and GLOB_BRACE options?

To exclude multiple files from an array generated using glob in PHP, developers can utilize Zeichenklassen (character classes) and the GLOB_BRACE option to specify patterns for file exclusion. By using character classes and brace expansion, developers can create complex patterns to exclude multiple files in a single glob call.

$excludedFiles = glob('{path/to/files/*.txt,path/to/files/*.csv}', GLOB_BRACE);
$allFiles = glob('path/to/files/*.{txt,csv}', GLOB_BRACE);
$filteredFiles = array_diff($allFiles, $excludedFiles);

foreach ($filteredFiles as $file) {
    echo $file . "\n";
}