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__toString

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 the string version of this ImmSet, which is "ImmSet"

public function __toString(): string;

Returns​

  • string - The string "ImmSet".

Examples​

The string version of an ImmSet is always "ImmSet":

$is = ImmSet {1, 2, 3};
echo $is->__toString()."\n";

$is2 = ImmSet {'a', 'b', 'c'};
echo $is2->__toString()."\n";

$is3 = ImmSet {};
echo $is3->__toString()."\n";