错误：无法在php编程中绑定到套接字

Question

这些示例显示接受字符串作为输入的TCP服务器，将其反转并将其返回给客户端。 这里是代码：

<?php 
$host = "127.0.0.1"; 
$port = 1234; 
set_time_limit(0); 
$socket = socket_create(AF_INET, SOCK_STREAM, 0) or die("Could not create socket\n"); 
$result = socket_bind($socket, $host, $port) or die("Could not bind to socket\n"); 
$result = socket_listen($socket, 3) or die("Could not set up socket listener\n"); 
$spawn = socket_accept($socket) or die("Could not accept incoming connection\n"); 
$input = socket_read($spawn, 1024) or die("Could not read input\n"); 
$input = trim($input); 
$output = strrev($input) . "\n"; 
socket_write($spawn, $output, strlen ($output)) or die("Could not write output\n"); 
socket_close($spawn); 
socket_close($socket); 
?> 

，并得到错误是这样的：

Warning: socket_bind() [function.socket-bind]: unable to bind address [0]: Only one usage of each socket address (protocol/network address/port) is normally permitted. in C:\xampp\htdocs\socket.php on line 5 
Could not bind to socket 

我能做什么来解决这个问题？

Answer 1

将此选项添加到程序结合

if (!socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1)) { 
    echo socket_strerror(socket_last_error($socket)); 
    exit; 
} 

参考之前http://www.php.net/manual/en/function.socket-bind.php

您还可以检查http://www.php.net/manual/en/function.socket-set-option.php的细节