Uppercase 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 all alphabetic characters converted to uppercase

namespace HH\Lib\Str;

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

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

Guide

• String

Parameters

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

Returns

• string

Examples

$locale = \HH\Lib\Locale\create("en_US.UTF-8");
$uppercase_string = Str\uppercase_l($locale, 'ifoo');
echo "Get uppercase string with en_US.UTF-8: $uppercase_string \n";