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isEmpty

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 false; a Pair cannot be empty

public function isEmpty(): bool;

Returns​

  • bool - false

Examples​

This example shows that a Pair can never be empty:

$p = Pair {'foo', -1.5};
\var_dump($p->isEmpty());

$p = Pair {null, -1.5};
\var_dump($p->isEmpty());