Surprisingly, on my Linux system, when connected to a localhost service using IPV4, stream_get_socket_name returns ::1 as the peer or local address. One would expect to get localhost or 127.0.0.1 but the ::1 IPV6 localhost is returned instead.
(PHP 5, PHP 7, PHP 8)
stream_socket_get_name — Retrieve the name of the local or remote sockets
Returns the local or remote name of a given socket connection.
The name of the socket, or false on failure.
Surprisingly, on my Linux system, when connected to a localhost service using IPV4, stream_get_socket_name returns ::1 as the peer or local address. One would expect to get localhost or 127.0.0.1 but the ::1 IPV6 localhost is returned instead.