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toSet

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.

Returns a deep copy of the current Set

public function toSet(): Set<Tv>;

Returns​

  • Set<Tv> - a Set that is a deep copy of the current Set.

Examples​

This example shows that toSet returns a deep copy of the Set:

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

// Make a deep copy of Set $s
$s2 = $s->toSet();

// Modify $s2 by adding an element
$s2->add('purple');
\var_dump($s2);

// The original Set $s doesn't include 'purple'
\var_dump($s);