password_get_info($hash)

show_404($page = '', $log_error = TRUE)

password_needs_rehash()

hash_equals($known_string, $user_string)

is_https()

get_instance()

remove_invisible_characters($str[, $url_encoded = TRUE])

get_mimes()

show_error($message, $status_code, $heading = 'An Error Was Encountered')

function_usable($function_name)