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inet_ntop

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.

Convert an INET or INET6 address to presentation format

namespace HH\Lib\OS;

function inet_ntop(
  AddressFamily $af,
  dynamic $addr,
): string;

See man inet_ntop

Fails with:

  • EAFNOSUPPORT if the address family is not supported
  • EINVAL if the address is the wrong type for the family

Parameters​

  • AddressFamily $af
  • dynamic $addr

Returns​

  • string