/** * Determines if a string starts with a specified substring, searching case-insensitively. * * As a special case, the method returns `true` if the searched substring is empty. * * @param string $withString The searched substring. * * @return bool `true` if the string starts with the substring specified, ignoring the letter case of the * characters, and `false` otherwise. */ public function startsWithCi($withString) { return CUString::startsWithCi($this, $withString); }