javascript - Problems encountered when writing communication code using php socket function? ?

The following socket code server-side PHP socket can receive messages from the client-side PHP socket, but cannot send messages to the client-side PHP socket. An error message is reported: Because the socket is not connected and (when using a sendto call to send a datagram socket When) no address is provided, the request to send or receive data is not accepted. I checked some information online, but I don’t know why, please ask God for help....

<code>服务端 PHP socket：

require_once 'socket_config.php';

$socket = socket_create(AF_INET , SOCK_STREAM , SOL_TCP);

socket_bind($socket , $host , $port);

socket_listen($socket , 3);

$client = socket_accept($socket);

$input = socket_read($client , $read_length , $read_type);

echo '来自客户端 PHP 的消息： ' . $input;

$output = strrev($input);

socket_write($client, $output , strlen($output));

socket_close($client);

socket_close($socket);




客户端 PHP Socket：

require_once 'socket_config.php';

$socket_client = socket_create(AF_INET , SOCK_STREAM , SOL_TCP);

$socket_con = socket_connect($socket_client , $host , $port);

$message = 'hello boy';

// 发送给服务端 socket

socket_write($socket_client , $message , strlen($message))

// 阅读来自服务端的响应
$result = socket_read($socket_client , $read_length , $read_type);

echo '来自服务端 PHP 的消息： ' . $result;

//socket_close($socket_client);

</code>

Solved, posted the answer found online: http://www.cnblogs.com/wolf-s...

Reply content:

The following socket code server-side PHP socket can receive messages from the client-side PHP socket, but cannot send messages to the client-side PHP socket. An error message is reported: Because the socket is not connected and (when using a sendto call to send a datagram socket When) no address is provided, the request to send or receive data is not accepted. I checked some information on the Internet, but I don’t know why. Please ask God for help....

<code>服务端 PHP socket：

require_once 'socket_config.php';

$socket = socket_create(AF_INET , SOCK_STREAM , SOL_TCP);

socket_bind($socket , $host , $port);

socket_listen($socket , 3);

$client = socket_accept($socket);

$input = socket_read($client , $read_length , $read_type);

echo '来自客户端 PHP 的消息： ' . $input;

$output = strrev($input);

socket_write($client, $output , strlen($output));

socket_close($client);

socket_close($socket);




客户端 PHP Socket：

require_once 'socket_config.php';

$socket_client = socket_create(AF_INET , SOCK_STREAM , SOL_TCP);

$socket_con = socket_connect($socket_client , $host , $port);

$message = 'hello boy';

// 发送给服务端 socket

socket_write($socket_client , $message , strlen($message))

// 阅读来自服务端的响应
$result = socket_read($socket_client , $read_length , $read_type);

echo '来自服务端 PHP 的消息： ' . $result;

//socket_close($socket_client);

</code>

Solved, posted the answer found online: http://www.cnblogs.com/wolf-s...

There is a wrong line on the server side, it should be written as

socket_write($client, $output, strlen($output));

This is my visual inspection without debugging. I don’t know if there are any other problems