Length L

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Returns the length of the given string in characters

namespace HH\Lib\Str;

function length_l(
  \HH\Lib\Locale\Locale $locale,
  string $string,
): int;

This function may be O(1) or O(n) depending on the encoding specified by the locale (LC_CTYPE).

See Str\length() (or pass Locale\c()) for the length in bytes.

Guide

• String

Parameters

• \HH\Lib\Locale\Locale $locale
• string $string

Returns

• int