Serialize Pure

:::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. :::

Pure variant of serialize

function serialize_pure(
  mixed $value,
): string;

Serializing objects with impure implementations of the __sleep method will result in coeffect violations.

Parameters

• mixed $value

Returns

• string