Array 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. :::

Chunks an array into size large chunks

function array_chunk<Tv>(
  mixed $input,
  int $size,
  bool $preserve_keys = false,
): varray<Container<int>>;

The last chunk may contain less than size elements.

Parameters

• mixed $input - The array to work on
• int $size - The size of each chunk
• bool $preserve_keys = false - When set to TRUE keys will be preserved. Default is FALSE which will reindex the chunk numerically

Returns

• mixed - - Returns a multidimensional numerically indexed array, starting with zero, with each dimension containing size elements.