/**
  * @en Replace occurrences of the search string with the replacement string
  * @ru Заменяет найденные вхождения подстроки в строке
  *
  * $string_ASCII = 'ASCII string example';   # string(20) "ASCII string example"
  * $string_UTF8  = 'UTF-8 string πράδειγμα'; # string(31) "UTF-8 string πράδειγμα"
  *
  * $result = string::replace($string_ASCII, 'example', 'πράδειγμα'); # string(31) "ASCII string πράδειγμα"
  * $result = string::replace($string_UTF8, 'πράδειγμα', 'example');  # string(20) "UTF-8 string example"
  *
  * @param string $string Any string
  * @param string $search Any substring
  * @param string $replace Any string
  * @param int $count
  *
  * @return string
  */
 public static function replace($string, $search, $replace, $count = null)
 {
     if ($count === null) {
         return string::replace_all($string, $search, $replace);
     }
     return str_replace($search, $replace, $string, $count);
 }