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lookupNamespaceUri

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.

Gets the namespace URI of the node based on the prefix

public function lookupNamespaceUri(
  mixed $namespaceuri,
): string;

Parameters​

  • mixed $namespaceuri - The prefix of the namespace.

Returns​

  • mixed - - The namespace URI of the node.