function splice()

in src/str/utf8/transform.php [146:161]

• 16 lines of code
• 4 McCabe index (conditional complexity)

function splice(
  string $string,
  string $replacement,
  int $offset,
  ?int $length = null,
)[rx_local]: string {
  invariant($length === null || $length >= 0, 'Expected non-negative length.');
  $total_length = length($string);
  $offset = _Private\validate_offset($offset, $total_length);
  if ($length === null || ($offset + $length) >= $total_length) {
    return slice($string, 0, $offset).$replacement;
  }
  return slice($string, 0, $offset).
    $replacement.
    slice($string, $offset + $length);
}