Php socket communication simple implementation

Principle socket communication here is not to say, its use is quite extensive, we can use a socket API interface to do it, you can also use the socket to enable communication between the two programs, we have to look at php how to achieve inside socket communication.

Since the socket server-side code to be listening port, waiting to receive a request to do so at the time php socket services required to run CMD php file inside.

If you want to run the CMD php file which is required for the following settings:

1. Add the environment variable named PHP_HOME, php file is installed .exe file address directory, such as D: \ wamp \ bin \ php \ php5.5.12 \ php.exe

2. Modify the value of path system variables

Add php installed inside the directory path of the values: such as D: \ wamp \ bin \ php \ php5.5.12;

Well, here we configured the environment variables, the next step we open the CMD, php file you want to run on the inside, such as aaa.php file, then we write these words:

php d:\wamp\www\aaa.php

Then press the Enter key, well, our php files in cmd run inside, and output the sentence: hello

In this case php file which can successfully run cmd, then we look at how to achieve php socket communication.

1.php made socket server

The main function of the communication socket is provided IP address and port number, port monitor, client connection, it receives the connection request receiving data, processing the data and returns.

code show as below:

//确保在连接客户端时不会超时

set_time_limit(0);

//设置IP和端口号

$address = "127.0.0.1";

$port = 2048; //调试的时候，可以多换端口来测试程序！

/**

 * 创建一个SOCKET 

 * AF_INET=是ipv4 如果用ipv6，则参数为 AF_INET6

 * SOCK_STREAM为socket的tcp类型，如果是UDP则使用SOCK_DGRAM

*/

$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n");

//阻塞模式

socket_set_block($sock) or die("socket_set_block() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n");

//绑定到socket端口

$result = socket_bind($sock, $address, $port) or die("socket_bind() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n");

//开始监听

$result = socket_listen($sock, 4) or die("socket_listen() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n");

echo "OK\nBinding the socket on $address:$port ... ";

echo "OK\nNow ready to accept connections.\nListening on the socket ... \n";

do { // never stop the daemon

 //它接收连接请求并调用一个子连接Socket来处理客户端和服务器间的信息

 $msgsock = socket_accept($sock) or die("socket_accept() failed: reason: " . socket_strerror(socket_last_error()) . "/n");

  

 //读取客户端数据

 echo "Read client data \n";

 //socket_read函数会一直读取客户端数据,直到遇见\n,\t或者\0字符.PHP脚本把这写字符看做是输入的结束符.

 $buf = socket_read($msgsock, 8192);

 echo "Received msg: $buf \n";

  

 //数据传送 向客户端写入返回结果

 $msg = "welcome \n";

 socket_write($msgsock, $msg, strlen($msg)) or die("socket_write() failed: reason: " . socket_strerror(socket_last_error()) ."/n");

 //一旦输出被返回到客户端,父/子socket都应通过socket_close($msgsock)函数来终止

 socket_close($msgsock);

} while (true);

socket_close($sock);

2.调取socket服务的客户端文件

客户端依然是要设置好要访问服务器的IP地址及端口号（即上一步骤中的IP及端口），完了创建一个socket连接，发送数据到服务器，接收返回数据。

set_time_limit(0);

 

$host = "127.0.0.1";

$port = 2048;

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)or die("Could not create  socket\n"); // 创建一个Socket

  

$connection = socket_connect($socket, $host, $port) or die("Could not connet server\n");  // 连接

socket_write($socket, "hello socket") or die("Write failed\n"); // 数据传送 向服务器发送消息

while ($buff = @socket_read($socket, 1024, PHP_NORMAL_READ)) {

  echo("Response was:" . $buff . "\n");

}

socket_close($socket);

3.在cmd里面运行服务端代码

运行成功，已经在监听端口了。。。

4.在网页里面运行我们的客户端网页，来向服务器交互数据

运行起来，浏览器显示：

cmd里面的服务端显示：

这是一个简单的socket通信的测试，至于socket接收到什么数据，怎么处理数据，返回什么类型的数据，还需要使用php来做逻辑了。

Php socket communication simple implementation

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