Basic principles of php socket|server server.php|client client.php

Basic principles and basic usage of php socket:
Server: Create a socket=》Bind this socket to the specified IP and port=》Listen to all link requests of this socket=》Respond or return data
Client :Create a socket socket=》Connect the socket that needs to be requested=》Send data to the socket=》Read the response data of the socket

(~_~) Please correct any inappropriate understanding~~~

Server.php



$host = '192.168.0.10';
$port = 88888;

if($socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)){
 echo " socket create success.n";
}

if($bind = socket_bind($socket, $host, $port)){
 echo "socket bind success.n";
}

if($listen = socket_listen( $socket)){
 echo "socket listening...n";
}

if($connect = socket_accept($socket)){
 echo "socket accept a connect success.n";
}

// ================================================== =//
socket_write($connect, 'I am from Server.php at DateTime:'.date('Y-m-d H:i:s')."n");
//========= ===========Send to client==================================== ===============//

//============================== =====================//
$read = socket_read($connect, 1024);
echo $read;
//======= =====Accept messages from the client============================///


//while($connect = socket_accept($socket)){
// $read = socket_read($connect, 1024);
// echo $read;
//}
//Loop accept

Client.php



$host = '192.168.0.10';
$port = 88888;

if($socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)){
 echo " socket create success.n";
}
socket_connect($socket, $host, $port);

//======================== ===============================//
socket_write($socket, 'I am from client.php at DateTime:' .date('Y-m-d H:i:s')."n");
//==================Send a request to the server====== ==========================================//

//== ================================================== ===//
$read = socket_read($socket, 1024);
echo $read;
//================Accept the return data from the server====== ===================//