Php的Socket初步

工作实在比较闲，就来写写博客吧。顺便整理下。环境：windows PHP在WIN下操作socket最好用命令行运行程序，至于为什么，自己可以体会下。 首先运行php 程序的路径，出现了这个提示表示你的php没有加入环境变量path下面。 然后找到你的php安装目录，我的是这

工作实在比较闲，就来写写博客吧。顺便整理下。环境：windows

PHP在WIN下操作socket最好用命令行运行程序，至于为什么，自己可以体会下。

首先运行php + 程序的路径，出现了这个提示表示你的php没有加入环境变量path下面。

然后找到你的php安装目录，我的是这个

然后复制上面的路径，右键点击我的电脑-属性-高级-环境变量，添加到环境变量中，注意有个;号，看下图

然后确定，保存。再次运行cmd，OK成功了。不会出现那个提示了。

接下来就是主题了，先放代码

<?php <span>//<span>确保在连接客户端时不会超时</span><span>set_time_limit</span>(0);

<span>$ip</span> = '127.0.0.1';
<span>$port</span> = 1935;

<span>/*</span><span>
 +-------------------------------
 *    @socket通信整个过程
 +-------------------------------
 *    @socket_create
 *    @socket_bind
 *    @socket_listen
 *    @socket_accept
 *    @socket_read
 *    @socket_write
 *    @socket_close
 +--------------------------------
 </span><span>*/</span>

<span>/*</span><span>----------------    以下操作都是手册上的    -------------------</span><span>*/</span>
<span>if</span>((<span>$sock</span> = socket_create(AF_INET,SOCK_STREAM,SOL_TCP)) echo "socket_create() 失败的原因是:".socket_strerror(<span>$sock</span>)."\n";
}

<span>if</span>((<span>$ret</span> = socket_bind(<span>$sock</span>,<span>$ip</span>,<span>$port</span>)) echo "socket_bind() 失败的原因是:".socket_strerror(<span>$ret</span>)."\n";
}

<span>if</span>((<span>$ret</span> = socket_listen(<span>$sock</span>,4)) echo "socket_listen() 失败的原因是:".socket_strerror(<span>$ret</span>)."\n";
}

<span>$count</span> = 0;

<span>do</span> {
    <span>if</span> ((<span>$msgsock</span> = socket_accept(<span>$sock</span>)) echo "socket_accept() failed: reason: " . socket_strerror(<span>$msgsock</span>) . "\n";
        <span>break</span>;
    } <span>else</span> {
        
        <span>//</span><span>发到客户端</span>        <span>$msg</span> ="测试成功！\n";
        socket_write(<span>$msgsock</span>, <span>$msg</span>, <span>strlen</span>(<span>$msg</span>));
        
        <span>echo</span> "测试成功了啊\n";
        <span>$buf</span> = socket_read(<span>$msgsock</span>,8192);
        
        
        <span>$talkback</span> = "收到的信息:<span>$buf</span>\n";
        <span>echo</span> <span>$talkback</span>;
        
        <span>if</span>(++<span>$count</span> >= 5){
            <span>break</span>;
        };
        
    
    }
    <span>//</span><span>echo $buf;</span>    socket_close(<span>$msgsock</span>);

} <span>while</span> (<span>true</span>);

socket_close(<span>$sock</span>);
?>

这是socket的服务端代码。然后运行cmd，注意是自己的程序存放路径啊。

没有反映，对现在服务端的程序已经开始运行，端口已经开始监听了。运行netstat -ano可以查看端口情况，我的是1935端口

看，端口已经处于LISTENING状态了。接下来我们只要运行客户端程序即可连接上。上代码

<?php <span>error_reporting(<span>E_ALL</span>);
<span>set_time_limit</span>(0);
<span>echo</span> "<h2>TCP/IP Connection</h2>\n";

<span>$port</span> = 1935;
<span>$ip</span> = "127.0.0.1";

<span>/*</span><span>
 +-------------------------------
 *    @socket连接整个过程
 +-------------------------------
 *    @socket_create
 *    @socket_connect
 *    @socket_write
 *    @socket_read
 *    @socket_close
 +--------------------------------
 </span><span>*/</span>

<span>$socket</span> = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
<span>if</span> (<span>$socket</span> echo "socket_create() failed: reason: " . socket_strerror(<span>$socket</span>) . "\n";
}<span>else</span> {
    <span>echo</span> "OK.\n";
}

<span>echo</span> "试图连接 '<span>$ip</span>' 端口 '<span>$port</span>'...\n";
<span>$result</span> = socket_connect(<span>$socket</span>, <span>$ip</span>, <span>$port</span>);
<span>if</span> (<span>$result</span> echo "socket_connect() failed.\nReason: (<span>$result</span>) " . socket_strerror(<span>$result</span>) . "\n";
}<span>else</span> {
    <span>echo</span> "连接OK\n";
}

<span>$in</span> = "Ho\r\n";
<span>$in</span> .= "first blood\r\n";
<span>$out</span> = '';

<span>if</span>(!socket_write(<span>$socket</span>, <span>$in</span>, <span>strlen</span>(<span>$in</span>))) {
    <span>echo</span> "socket_write() failed: reason: " . socket_strerror(<span>$socket</span>) . "\n";
}<span>else</span> {
    <span>echo</span> "发送到服务器信息成功！\n";
    <span>echo</span> "发送的内容为:<font color="red"><span>$in</span></font> <br>";
}

<span>while</span>(<span>$out</span> = socket_read(<span>$socket</span>, 8192)) {
    <span>echo</span> "接收服务器回传信息成功！\n";
    <span>echo</span> "接受的内容为:",<span>$out</span>;
}


<span>echo</span> "关闭SOCKET...\n";
socket_close(<span>$socket</span>);
<span>echo</span> "关闭OK\n";
?>

至此客户端已经连接上服务端了。这只是个小例子，很多东西知道原理其他就好做了。