note 123753 added to function.socket-set-option

<question> Why is the size of the buffer 2 times that set by me? <?php //Before setting the cache area $sock = socket_create(AF_INET, SOCK_STREAM, getprotobyname('tcp')); socket_bind($sock, '127.0.0.1',5000); socket_listen($sock,1024); $sndbuf = socket_get_option($sock,SOL_SOCKET,SO_SNDBUF); $rcvbuf = socket_get_option($sock,SOL_SOCKET,SO_RCVBUF); printf("send buffer size(写缓存区大小):%sm \n",$sndbuf/1024); printf("receive buffer(读缓存区大小)%sm \n",$rcvbuf/1024); //After setting the cache area $snd_buf = 1024*3; $rcv_buf = 1024*3; socket_set_option($sock,SOL_SOCKET,SO_SNDBUF, $snd_buf); socket_set_option($sock,SOL_SOCKET,SO_RCVBUF, $rcv_buf); $sndbuf = socket_get_option($sock,SOL_SOCKET,SO_SNDBUF); $rcvbuf = socket_get_option($sock,SOL_SOCKET,SO_RCVBUF); printf("send buffer size(写缓存区大小):%sm \n",$sndbuf/1024); printf("receive buffer size(读缓存区大小)%sm \n",$rcvbuf/1024); ?> ---- Server IP: 208.43.231.9 Probable Submitter: 185.85.3.142 (proxied: 104.199.167.217) ---- Manual Page -- http://php.net/manual/en/function.socket-set-option.php Edit -- https://master.php.net/note/edit/123753 Del: integrated -- https://master.php.net/note/delete/123753/integrated Del: useless -- https://master.php.net/note/delete/123753/useless Del: bad code -- https://master.php.net/note/delete/123753/bad+code Del: spam -- https://master.php.net/note/delete/123753/spam Del: non-english -- https://master.php.net/note/delete/123753/non-english Del: in docs -- https://master.php.net/note/delete/123753/in+docs Del: other reasons-- https://master.php.net/note/delete/123753 Reject -- https://master.php.net/note/reject/123753 Search -- https://master.php.net/manage/user-notes.php