Basic socket-based communication for PHP

PHP Basic socket-based communication 1, preface

A socket is an intermediate software abstraction layer that the application layer communicates with the TCP/IP protocol family, which is a set of interfaces. In design mode, the socket is actually a façade mode, it is the complex TCP/IP protocol family hidden behind the socket interface, for the user, a set of simple interface is all, let the socket to organize data to meet the specified protocol.

This introduction degree Niang a lot, want to know more self Baidu, look down on the friend remember to open the socket extension first;

2. Create Socke server Side

Basic steps:

• Initialize 86socket
• Port bindings
• Port for monitoring
• Call Accept Block
• Waiting for the customer service side connection

3, server-side code implementation

<?Phpecho"****************server*****************\r\n";//Set IP and ports (ports must be guaranteed not to be occupied and allowed to be externally accessible)$ip ="127.0.0.1"; $port=1935;//Timeout DesignSet_time_limit (0);//Create socket$socket = Socket_create (Af_inet, Sock_stream,0) or Die ("failed to create socket because: {socket_strerror ($socket)}\r\n");//bind socket to specified IP and port$ret = Socket_bind ($socket, $ip, $port) or Die ("The bind socket failed because: {socket_strerror ($ret)}\r\n");//monitor socket, maximum number of 4$ret = Socket_listen ($socket,4) or Die ("the listener socket failed because: {socket_strerror ($ret)}\r\n");//Count$count =0; Echo"wait for the connection!!! \ r \ n"; Do {    //Request Connection received//calling child socket processing information$msgsock =socket_accept ($socket); if(!$msgsock) {echo"the socket block failed because: {socket_strerror ($msgsock)}\r\n"; } $msg="<p style= ' color:red ' > Connection Success </p>"; //process client input and return dataSocket_write ($msgsock, $msg, strlen ($msg)); $buf= Socket_read ($msgsock,8192); $talkback="the message received is: {$buf}\r\n";    Echo $talkback; if(+ + $count >5) {         Break; } socket_close ($msgsock);}  while(true); Socket_close ($socket);

4. Create Slient Client

Basic steps:

• Create a socket resource using the TCP protocol
• Connecting the socket server
• Socket_write Transferring Data
• Socket_read receiving data
• Close the socket resource

5. Client code Implementation

<?Phpecho'****************client*****************<br/>';//set IP and Port$port =1935; $ip='127.0.0.1';//Timeout DesignSet_time_limit (0);//Create a socket resource for the TCP protocol$socket = Socket_create (Af_inet, Sock_stream, sol_tcp) or Die ('socket_create Failure:'. Socket_strerror ($socket)); Echo'Create success <br/>'; $restult=Socket_connect ($socket, $ip, $port); Echo'Connection Success <br/>';$inch='Create a Sokcet customer terminal success, random number ='. Rand ( +,9999);if(Socket_write ($socket, $inch, Strlen ($inch)) {echo'sent successfully, send message to'.$inch.'<br/>';} Else{echo'send failed, original because'. $socket _strerror ($socket).'<br/>';} while($ out= Socket_read ($socket,8192) {echo'receive the message successfully, the information is'.$ out.'<br/>';} Echo'socket off <br/>'; Socket_close ($socket); Echo'Close Completion <br/>';

6, open the customer service side 7, using the Client Connection server

Service-Side status:

The basic connection to the socket is almost there.

8, related line number introduction

8.1, Socket_create

Used to create a socket resource that successfully returns a socket and fails to return false;

Detailed reference: http://www.php.net/manual/zh/function.socket-create.php

8.2, Socket_bind

Binds a name to the socket, successfully returns true, FALSE when the failure returns;

Detailed reference: http://php.net/manual/en/function.socket-bind.php

8.3, Socket_listen

Listens for a socket resource, returns true successfully, False when the failure returns;

Detailed reference: http://php.net/manual/zh/function.socket-listen.php

、

8.4, Socket_accept

Legal creation of a child socket, successfully returned a new socket resource, failed to return false;

Detailed reference: http://www.php.net/manual/en/function.socket-accept.php

8.5, Socket_read

Reads the information sent by the customer service, returns the read information successfully, otherwise returns an empty string

(Socket_read () returns a zero length string ("") when there was no more data to read.)

Detailed reference: http://www.php.net/manual/en/function.socket-read.php

8.6, Socket_write

Want the socket to write data to the cache

Detailed reference: http://php.net/manual/en/function.socket-write.php

8.7, Socket_close

Close the socket resource

Detailed reference: http://php.net/manual/zh/function.socket-close.php

8.8, Socket_strerror

Get error message

Detailed reference: http://php.net/manual/zh/function.socket-strerror.php

Basic socket-based communication for PHP