Creating a server with PHP

<?php
server_time_limit(0);
// open a server on port 10000
$server_addr="tcp://0.0.0.0:10000";
$server = stream_socket_server($server_addr, $errno, $errorMessage);

if ($server === false) 
{
	debug("Could not bind to socket: $errorMessage");
	exit;
}
debug("Server listens successfully on $server_addr - press Ctrl-C to stop it");

$client_socks = array();

while(true)
{
	//prepare readable sockets
	$read_socks = $client_socks;
	$read_socks[] = $server;
	
	//start reading and use a large timeout
	if(!stream_select ( $read_socks, $write, $except, 300000 ))
	{
		die('something went wrong while selecting');
	}
	
	//new client
	if(in_array($server, $read_socks))
	{
		$new_client = stream_socket_accept($server);
		
		if ($new_client) 
		{
			//print remote client information, ip and port number
			debug('New Connection accepted from ' . stream_socket_get_name($new_client, true) );
			
			$client_socks[] = $new_client;
			debug( "Now there are total ". count($client_socks) . " clients connected");
		}
		
		//delete the server socket from the read sockets
		unset($read_socks[ array_search($server, $read_socks) ]);
	}
	
	//message from existing client
	foreach($read_socks as $sock)
	{
		$data = fread($sock, 128);
		$ip=stream_socket_get_name($client_socks[ array_search($sock, $client_socks) ], true);
		
		if(!$data)
		{
			unset($client_socks[ array_search($sock, $client_socks) ]);
			@fclose($sock);
			debug( "A client ($ip) disconnected. Now there are total ". count($client_socks) . " clients.n");
			continue;
		}else
		{
			//-----------------------------------------------------------------------------------------------------------------------------------
			//data process here
			
			//data process end here
			//-----------------------------------------------------------------------------------------------------------------------------------
			debug("$ip: ".$data);
		}
		//send the message back to client
		fwrite($sock, $data);
	}
}
function debug($s)
{
	$d=date("Y-m-d H:i:s");
	echo "\r\n $d - : ".$s;
}
?>