Capitalize 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 string with the first character capitalized

namespace HH\Lib\Str;

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

If the first character is already capitalized or isn't alphabetic, the string will be unchanged.

Locale-specific capitalization rules will be respected, e.g. i -> I vs i -> İ.

• To capitalize all characters, see Str\uppercase_l().
• To capitalize all words, see Str\capitalize_words_l().

Guide

• String

Parameters

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

Returns

• string