public function parse($data) {
    $info = [];

    if (preg_match_all('
      @^\s*                           # Start at the beginning of a line, ignoring leading whitespace
      ((?:
        [^=;\[\]]|                    # Key names cannot contain equal signs, semi-colons or square brackets,
        \[[^\[\]]*\]                  # unless they are balanced and not nested
      )+?)
      \s*=\s*                         # Key/value pairs are separated by equal signs (ignoring white-space)
      (?:
        ("(?:[^"]|(?<=\\\\)")*")|     # Double-quoted string, which may contain slash-escaped quotes/slashes
        (\'(?:[^\']|(?<=\\\\)\')*\')| # Single-quoted string, which may contain slash-escaped quotes/slashes
        ([^\r\n]*?)                   # Non-quoted string
      )\s*$                           # Stop at the next end of a line, ignoring trailing whitespace
      @msx', $data, $matches, PREG_SET_ORDER)) {
      foreach ($matches as $match) {
        // Fetch the key and value string.
        $i = 0;
        foreach (['key', 'value1', 'value2', 'value3'] as $var) {
          $$var = isset($match[++$i]) ? $match[$i] : '';
        }

        if (isset($key) && isset($value1) && isset($value2) && isset($value3)) {
          $value = stripslashes(substr($value1, 1, -1)) . stripslashes(substr($value2, 1, -1)) . $value3;

          // Parse array syntax.
          $keys = preg_split('/\]?\[/', rtrim($key, ']'));
          $last = array_pop($keys);
          $parent = &$info;

          // Create nested arrays.
          foreach ($keys as $key) {
            if ($key == '') {
              $key = count($parent);
            }
            if (!isset($parent[$key]) || !is_array($parent[$key])) {
              $parent[$key] = [];
            }
            $parent = &$parent[$key];
          }

          // Handle PHP constants.
          if (preg_match('/^\w+$/i', $value) && defined($value)) {
            $value = constant($value);
          }

          // Insert actual value.
          if ($last == '') {
            $last = count($parent);
          }
          $parent[$last] = $value;
        }
      }
    }

    return $info;
  }