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HomeBackend DevelopmentPHP Tutorial求解:PHP socket 的有关问题

求解:PHP socket 的问题
下面这段测试代码,我在本地用appserv搭建的环境,执行无误。而且可以用客户端连上去并执行。

<?php<br /> <br />//Reduce errors<br />error_reporting(~E_WARNING);<br /> <br />//Create a UDP socket<br />if(!($sock = socket_create(AF_INET, SOCK_DGRAM, 0)))<br />{<br />    $errorcode = socket_last_error();<br />    $errormsg = socket_strerror($errorcode);<br />     <br />    die("Couldn't create socket: [$errorcode] $errormsg \n");<br />}<br /> <br />echo "Socket created \n";<br /> <br />// Bind the source address<br />if( !socket_bind($sock, "localhost" , 9999) )<br />{<br />    $errorcode = socket_last_error();<br />    $errormsg = socket_strerror($errorcode);<br />     <br />    die("Could not bind socket : [$errorcode] $errormsg \n");<br />}<br /> <br />echo "Socket bind OK \n";<br /> <br />//Do some communication, this loop can handle multiple clients<br />while(1)<br />{<br />    echo "Waiting for data ... \n";<br />     <br />    //Receive some data<br />    $r = socket_recvfrom($sock, $buf, 512, 0, $remote_ip, $remote_port);<br />    echo "$remote_ip : $remote_port -- " . $buf;<br />     <br />    //Send back the data to the client<br />    socket_sendto($sock, "OK " . $buf , 100 , 0 , $remote_ip , $remote_port);<br />}<br /> <br />socket_close($sock);<br /><br />?>


但是,我放到vps上之后,它显示该端口是打开的,而且无法再次打开(第二遍执行这个脚本的时候,返回错误信息,端口已被占用)。我扫描端口发现9999确实已经是一个打开的UDP端口,但是,用客户端连得上去却没法完成通信(或许不可以发,或许不可以收,who knows。。。)

下面是phpinfo的结果,显示socket支持是打开的。(太长了,ctr+f后找到的socket都在这里了)
Configure Command	 './configure' '--prefix=/usr/local/php5' '--enable-force-cgi-redirect' '--enable-fastcgi' '--with-config-file-path=/usr/local/etc/php5/cgi' '--with-curl=/usr/local/lib' '--with-gd' '--with-gettext' '--with-jpeg-dir=/usr/local/lib' '--with-freetype-dir=/usr/local/lib' '--with-kerberos' '--with-openssl' '--with-mcrypt' '--with-mhash' '--with-mysql=/usr' '--with-mysqli=/usr/bin/mysql_config' '--with-pcre-regex=/usr/local' '--with-pdo-mysql=/usr' '--with-pear' '--with-png-dir=/usr/local/lib' '--with-xsl' '--with-zlib' '--with-zlib-dir=/usr/local/lib' '--enable-zip' '--enable-gd-native-ttf' '--with-iconv=/usr/local' '--enable-bcmath' '--enable-calendar' '--enable-ftp' '--enable-magic-quotes' '--enable-sockets' '--enable-mbstring'

Registered Stream Socket Transports	tcp, udp, unix, udg, ssl, sslv3, sslv2, tls

sockets<br /><br />Sockets Support	enabled<br />

default_socket_timeout	60	60


额,哪位大牛有过经验,跪谢啊~
------解决方案--------------------
换一个端口号

已打开的端口,就不能重复打开
------解决方案--------------------
看看防火墙什么的
------解决方案--------------------
9999 是已经打开的端口没错 但是你有没有9999这个端口有没有没其它的程序所占用 如果没有被其它的程序所占用那么可能考虑设置一下防火墙

否则的话 就换一个新的端口或者关闭占用9999端口的程序
也可以把那个程序换一个其它的端口

总之一个端口只能映射给一个程序

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