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Reverse

hphp/hack/manual/hsl/Functions/HH.Lib.Str/reverse.md

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:::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

Hack
namespace HH\Lib\Str;

function reverse(
  string $string,
): string;

Guide

Parameters

  • string $string

Returns

  • string

Examples

basic-usage.hack
$result = Str\reverse("example_string");
echo($result);
//result: "gnirts_elpmaxe"

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

$result = Str\reverse("");
echo($result);
//result: ""
<!-- HHAPIDOC -->