File Attribute Parameters

:::info[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. :::

Get all parameters for the given attribute on the given file

namespace HH\Facts;

function file_attribute_parameters(
  string $file,
  classname<\HH\FileAttribute> $attribute,
): vec<dynamic>;

Return an empty vec if the given file doesn't exist or doesn't have the given attribute.

Throw InvalidOperationException if Facts is not enabled.

Parameters

• string $file
• classname<\HH\FileAttribute> $attribute

Returns

• vec<dynamic>