socket的使用

一、开启socket

phpinfo();查看是否开启了socket扩展，否则在php.ini中开启。

二、服务器端代码的写法

<?php
    error_reporting(E_ALL);
    set_time_limit(0);
    //ob_implicit_flush();
     
    $address = '127.0.0.1';
    $port = 10005;
    //创建端口
    if( ($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
    	echo "socket_create() failed :reason:" . socket_strerror(socket_last_error()) . "\n";
    }
     
    //绑定
    if (socket_bind($sock, $address, $port) === false) {
    	echo "socket_bind() failed :reason:" . socket_strerror(socket_last_error($sock)) . "\n";
    }
     
    //监听
    if (socket_listen($sock, 5) === false) {
    	echo "socket_bind() failed :reason:" . socket_strerror(socket_last_error($sock)) . "\n";
    }
     
    do {
    	//得到一个链接
    	if (($msgsock = socket_accept($sock)) === false) {
    		echo "socket_accepty() failed :reason:".socket_strerror(socket_last_error($sock)) . "\n";
    		break;
    	}
    	//welcome  发送到客户端
    	$msg = "<font color='red'>server send:welcome</font><br/>";
    	socket_write($msgsock, $msg, strlen($msg));
    	echo 'read client message\n';
    	$buf = socket_read($msgsock, 8192);
    	$talkback = "received message:$buf\n";
    	echo $talkback;
    	if (false === socket_write($msgsock, $talkback, strlen($talkback))) {
    		echo "socket_write() failed reason:" . socket_strerror(socket_last_error($sock)) ."\n";
    	} else {
    		echo 'send success';
    	}
    	socket_close($msgsock);
    } while(true);
    //关闭socket
    socket_close($sock);
    ?>

服务器端需要在cli模式是执行，有可能cli模式下php.ini文件载入的不一样。

可以像如下输出

http://images.cnblogs.com/cnblogs_com/phpzxh/WindowsLiveWriter/phpsocket_E8E0/image_2.png

这时候在zhoxh目录下就有个tem.text文件。查看 Configuration File (php.ini) Path => C:\WINDOWS 。不是我的php.ini 文件，这说明调用的php.ini文件时错误的。这时候我们要指定php.ini文件命令如下

http://images.cnblogs.com/cnblogs_com/phpzxh/WindowsLiveWriter/phpsocket_E8E0/image_4.png

注意的是我的php可以直接执行时配置了环境变量。

三、客户端

<?php
    //error_reporting(E_ALL);
    echo "<h2>tcp/ip connection </h2>\n";
    $service_port = 10005;
    $address = '127.0.0.1';
     
    $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
    if ($socket === false) {
    	echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
    } else {
    	echo "OK. \n";
    }
     
    echo "Attempting to connect to '$address' on port '$service_port'...";
    $result = socket_connect($socket, $address, $service_port);
    if($result === false) {
    	echo "socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "\n";
    } else {
    	echo "OK \n";
    }
    $in = "HEAD / http/1.1\r\n";
    $in .= "HOST: localhost \r\n";
    $in .= "Connection: close\r\n\r\n";
    $out = "";
    echo "sending http head request ...";
    socket_write($socket, $in, strlen($in));
    echo  "OK\n";
     
    echo "Reading response:\n\n";
    while ($out = socket_read($socket, 8192)) {
    	echo $out;
    }
    echo "closeing socket..";
    socket_close($socket);
    echo "ok .\n\n";
    ?>

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