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array_multisort1

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.

array_multisort() can be used to sort several arrays at once, or a multi-dimensional array by one or more dimensions

function array_multisort1(
  inout mixed $arg1,
): bool;

Associative (string) keys will be maintained, but numeric keys will be re-indexed.

Parameters​

  • inout mixed $arg1 - An array being sorted.

Returns​

  • bool - - Returns TRUE on success or FALSE on failure.