Chunk

:::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 a vec containing the string split into chunks of the given size

namespace HH\Lib\Str;

function chunk(
  string $string,
  int $chunk_size = 1,
): vec<string>;

To split the string on a delimiter, see Str\split().

Guide

• String

Parameters

• string $string
• int $chunk_size = 1

Returns

• vec<string>

Examples

$result = Str\chunk("example_string", 5);
print_r($result);
//result: ["examp", "le_st", "ring"]

$result = Str\chunk("example_string", 50);
print_r($result);
//result: ["example_string"]