Reverse

:::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. :::

Reverse a string by bytes

namespace HH\Lib\Str;

function reverse(
  string $string,
): string;

Guide

• String

Parameters

• string $string

Returns

• string

Examples

$result = Str\reverse("example_string");
echo($result);
//result: "gnirts_elpmaxe"

$result = Str\reverse("Example_string");
echo($result);
//result:"gnirts_elpmaxE"

$result = Str\reverse("");
echo($result);
//result: ""