使用PHP进行UDP Socket编程

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使用PHP进行UDP Socket编程

江湖 PHP 2016-2-26 1123 0评论

本文主要是通过简单的例子介绍下UDP Socket编程.

1.UDP服务器

<?php
//Reduce errors
error_reporting(~E_WARNING);

//Create a UDP socket
if(!($sock = socket_create(AF_INET, SOCK_DGRAM, 0))) {
    $errorcode = socket_last_error();
    $errormsg = socket_strerror($errorcode);
    die("Couldn't create socket: [$errorcode] $errormsg \n");
}

echo "Socket created \n";

// Bind the source address
if( !socket_bind($sock, "0.0.0.0" , 11300) ) {
    $errorcode = socket_last_error();
    $errormsg = socket_strerror($errorcode);
    die("Could not bind socket : [$errorcode] $errormsg \n");
}

echo "Socket bind OK \n";

//Do some communication, this loop can handle multiple clients
while(1) {
    echo "Waiting for data ... \n";

    //Receive some data
    $r = socket_recvfrom($sock, $buf, 512, 0, $remote_ip, $remote_port);
    echo "$remote_ip : $remote_port -- " . $buf;

    //Send back the data to the client
    socket_sendto($sock, "OK " . $buf , 100 , 0 , $remote_ip , $remote_port);
}

socket_close($sock);

在Terminal运行:

$php socket_udp_server.php

Socket created

Socket bind OK

Waiting for data …

2.UDP客户端

<?php
//Reduce errors
error_reporting(~E_WARNING);

$server = '127.0.0.1';
$port = 11300;

if(!($sock = socket_create(AF_INET, SOCK_DGRAM, 0))) {
    $errorcode = socket_last_error();
    $errormsg = socket_strerror($errorcode);
    die("Couldn't create socket: [$errorcode] $errormsg \n");
}

echo "Socket created \n";

//Communication loop

while(1) {

    //Take some input to send

    echo 'Enter a message to send : ';
    $input = fgets(STDIN);

    //Send the message to the server
    if( ! socket_sendto($sock, $input , strlen($input) , 0 , $server , $port)) {

        $errorcode = socket_last_error();

        $errormsg = socket_strerror($errorcode);

        die("Could not send data: [$errorcode] $errormsg \n");

    }

    //Now receive reply from server and print it

    if(socket_recv ( $sock , $reply , 2045 , MSG_WAITALL ) === FALSE) {

        $errorcode = socket_last_error();

        $errormsg = socket_strerror($errorcode);

        die("Could not receive data: [$errorcode] $errormsg \n");

    }

    echo "Reply : $reply";
}

在Terminal运行客户端程序:

$php socket_udp_client.php

Socket created

Enter a message to send : udp testonly

Reply : OK udp testonly

Enter a message to send :

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