function search_last()

in src/str/utf8/introspect.php [94:107]

• 12 lines of code
• 3 McCabe index (conditional complexity)

function search_last(string $haystack, string $needle, int $offset = 0)[rx_local]: ?int {
  $haystack_length = length($haystack);
  invariant(
    $offset >= -$haystack_length && $offset <= $haystack_length,
    'Offset is out-of-bounds.',
  );
  /* HH_FIXME[2049] __PHPStdLib */
  /* HH_FIXME[4107] __PHPStdLib */
  $position = \mb_strrpos($haystack, $needle, $offset, Encoding::UTF8);
  if ($position === false) {
    return null;
  }
  return $position;
}