Get Headers Secure

:::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. :::

Fetch all HTTP request headers, including duplicates

namespace HH;

function get_headers_secure(): darray<string, varray<string>>;

Returns

• array - - An associative array of all the HTTP headers in the current request. The values in the array will be strings for uniquely specified headers, but arrays where a header was specified more than once.