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In our last section, we built the client chat room so people can go on and message each other. In this section we will build the PHP5 socket script to handle the client connections and messages.

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Go ahead and copy and paste all of the following code into a new PHP file. Save it as socketShell.php.

#!/usr/bin/php -q

<?php

/*

Raymond Fain

Used for PHP5 Sockets with Flash 8 Tutorial for Kirupa.com

For any questions or concerns, email me at [email protected]

or simply visit the site, www.php.net, to see if you can find an answer.

*/

 

 

error_reporting(E_ALL);

 

set_time_limit(0);

 

ob_implicit_flush();

 

$address = '192.168.0.16';

$port = 9999;

 

//---- Function to Send out Messages to Everyone Connected ----------------------------------------

 

function send_Message($allclient, $socket, $buf) {

foreach($allclient as $client) {

socket_write($client, "$socket wrote: $buf");

}

}

 

 

 

//---- Start Socket creation for PHP 5 Socket Server -------------------------------------

 

if (($master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) < 0) {

echo "socket_create() failed, reason: " . socket_strerror($master) . "\n";

}

 

socket_set_option($master, SOL_SOCKET,SO_REUSEADDR, 1);

 

 

if (($ret = socket_bind($master, $address, $port)) < 0) {

echo "socket_bind() failed, reason: " . socket_strerror($ret) . "\n";

}

 

 

if (($ret = socket_listen($master, 5)) < 0) {

echo "socket_listen() failed, reason: " . socket_strerror($ret) . "\n";

}

 

 

 

$read_sockets = array($master);

 

//---- Create Persistent Loop to continuously handle incoming socket messages ---------------------

while (true) {

$changed_sockets = $read_sockets;

 

$num_changed_sockets = socket_select($changed_sockets, $write = NULL, $except = NULL, NULL);

 

foreach($changed_sockets as $socket) {

 

if ($socket == $master) {

 

if (($client = socket_accept($master)) < 0) {

echo "socket_accept() failed: reason: " . socket_strerror($msgsock) . "\n";

continue;

} else {

array_push($read_sockets, $client);

}

} else {

 

$bytes = socket_recv($socket, $buffer, 2048, 0);

 

if ($bytes == 0) {

$index = array_search($socket, $read_sockets);

unset($read_sockets[$index]);

socket_close($socket);

}else{

$allclients = $read_sockets;

array_shift($allclients);

send_Message($allclients, $socket, $buffer);

}

}

 

}

}

 

?>

As you can see, there is a lot that makes this stuff work! I hope your not running away already. Tackling this thing isn't as bad as you think. In the downloadable zip file I have provided at the end of this tutorial, I have included all the comments that you will need to understand this bad boy!!

On the next page I will briefly go over some things that you see here.

So onwards to the next page!

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