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clear

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.

Remove all the elements from the current Map

public function clear(): Map<Tk, Tv>;

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

Returns​

Examples​

$m = Map {
  'red' => '#ff0000',
  'green' => '#00ff00',
  'blue' => '#0000ff',
  'yellow' => '#ffff00',
};
\var_dump($m);

$m->clear();
\var_dump($m);