Hphp Murmurhash

:::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. :::

hphp_murmurhash

function hphp_murmurhash(
  string $key,
  int $len,
  int $seed,
): int;

Parameters

• string $key - The key to hash
• int $len - Number of bytes to use from the key
• int $seed - The seed to use for hashing

Returns

• int - The Int64 hash of the first len input characters