1.python寫法

import socket

def reuse_socket_addr():
    sock = socket.socket( socket.AF_INET, socket.SOCK_STREAM )

    # Get the old state of the SO_REUSEADDR option
    old_state = sock.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR )
    print "Old sock state: %s" %old_state

    # Enable the SO_REUSEADDR option
    sock.setsockopt( socket.SOL_SOCKET, socket.SO_REUSEADDR, 1 )
    new_state = sock.getsockopt( socket.SOL_SOCKET, socket.SO_REUSEADDR )
    print "New sock state: %s" %new_state

    local_port = 8282
    
    srv = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    srv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    srv.bind( ('', local_port) )
    srv.listen(1)
    print ("Listening on port: %s " %local_port)
    while True:
        try:
            connection, addr = srv.accept()
            print 'Connected by %s:%s' % (addr[0], addr[1])
        except KeyboardInterrupt:
            break
        except socket.error, msg:
            print '%s' % (msg,)


if __name__ == '__main__':
    reuse_socket_addr()
 

<?php

function reuse_socket_addr(){
    $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

    // Get the old state of the SO_REUSEADDR option
    $old_state = socket_get_option($socket, SOL_SOCKET, SO_REUSEADDR);
    printf("Old sock state: %s\n", $old_state);

    // Enable the SO_REUSEADDR option
    socket_set_option($socket,SOL_SOCKET,SO_REUSEADDR, 1);
    $new_state = socket_get_option($socket, SOL_SOCKET, SO_REUSEADDR);
    printf("New sock state: %s\n", $new_state);

    $local_port = 8282;

    $srv = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
    socket_set_option($srv, SOL_SOCKET, SO_REUSEADDR, 1);
    socket_bind($srv, '127.0.0.1', $local_port);
    socket_listen($srv);
    printf("Listening on port: %s ", $local_port);

    while(true){
        $msg = socket_accept($srv);
        if($msg !== false){
            $buf = socket_read($srv, MAXLINE);
        }else{
            $error = socket_strerror(socket_last_error($srv));
            printf("%s", $error);
        }
    }
}

reuse_socket_addr();