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chunk

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​

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"]