Remove

:::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. :::

Removes the specified value from the current Set

public function remove(
  Tv $val,
): Set<Tv>;

Future changes made to the current Set ARE reflected in the returned Set, and vice-versa.

Parameters

• Tv $val

Returns

• Set<Tv> - Returns itself.

Examples

This example shows that removing a value that doesn't exist in the Set has no effect:

$s = Set {'red', 'green'};

// Remove 'red' from the Set
$s->remove('red');
\var_dump($s);

// Remove 'red' again (has no effect)
$s->remove('red');
\var_dump($s);