note 123992 added to function.socket-set-option

PLEASE NOTE PHP 7.3.6, and probably many previous versions, automatically sets SO_REUSEADDR when you use stream_socket_server(). php_network_bind_socket_to_local_addr() is called at https://github.com/php/php-src/blob/623911f993f39ebbe75abe2771fc89faf6b15b9b/main/streams/xp_socket.c#L675 and defined at https://github.com/php/php-src/blob/61a6a6ec51297506c54f3c6e60ace9b892d0a3e4/main/network.c#L401 and if you take a look you'll see #ifdef SO_REUSEADDR setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)&sockoptval, sizeof(sockoptval)); #endif I initially thought I'd need to play with context options to turn this on, but no, the simplest single-arg call with no error checking and just an address, works for me. strace your PHP binary to be 100% sure: ... setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 ... The chances are you ARE using SO_REUSEADDR unless you're using a 100-year old UNIX clone in a month with a Z in it. ---- Server IP: 208.43.231.9 Probable Submitter: 101.0.109.162 (proxied: 58.166.84.80) ---- Manual Page -- http://php.net/manual/en/function.socket-set-option.php Edit -- https://master.php.net/note/edit/123992 Del: integrated -- https://master.php.net/note/delete/123992/integrated Del: useless -- https://master.php.net/note/delete/123992/useless Del: bad code -- https://master.php.net/note/delete/123992/bad+code Del: spam -- https://master.php.net/note/delete/123992/spam Del: non-english -- https://master.php.net/note/delete/123992/non-english Del: in docs -- https://master.php.net/note/delete/123992/in+docs Del: other reasons-- https://master.php.net/note/delete/123992 Reject -- https://master.php.net/note/reject/123992 Search -- https://master.php.net/manage/user-notes.php