Uppercase - Hhvm — ContextQMD

:::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

Hack

namespace HH\Lib\Str;

function uppercase(
  string $string,
): string;

Guide

String

Parameters

string $string

Returns

string

Examples

basic-usage.hack

$string = "hhvm";

$string_upper = Str\uppercase($string);
echo "Uppercase string: $string_upper \n";
//result: Uppercase string: HHVM