Find files, php5 way

Find files, implemented using iterator.

class RegexFilter extends FilterIterator {
    protected $regex;

    public function __construct(Iterator $it, $regex) {
        parent::__construct($it);
        $this->regex = $regex;
    }

    public function accept() {
        return preg_match($this->regex, $this->current());
    }
}

function find_files($path, $pattern, $include_dir=FALSE) {
  $objects = new RecursiveDirectoryIterator($path);
  $objects = new RecursiveIteratorIterator($objects, RecursiveIteratorIterator::SELF_FIRST);
  $objects = new RegexFilter($objects, $pattern);
  return $objects;
}

Example usage:

$files = find_files('/tmp', '/.py$/');
foreach ($files as $file) {
  echo $file;
}

Previously using php 4:

function find_files4($path, $pattern, $callback=null) {                                                                                               
    $path = rtrim(str_replace("\\", "/", $path), '/') . '/';
    $matches = Array();
    $entries = Array();
    $dir = dir($path);
    while (false !== ($entry = $dir->read())) {
        $entries[] = $entry;
    }
    $dir->close();
    $files = array();
    foreach ($entries as $entry) {
        $fullname = $path . $entry;
        if ($entry != '.' && $entry != '..' && is_dir($fullname)) {
            $this->find_files($fullname, $pattern, $callback);
        } else if (is_file($fullname) && preg_match($pattern, $entry)) {
            if (!$callback) {
                $files[] = $fullname;
            } else {
                call_user_func($callback, $fullname);
            }
        }
    }
    if (!$callback) {
        return $files;
    }
}