Simple UDP server and client

Here is a basic UDP socket server that echoes the IP and port of the remote requests. In addition there's a client that could be used for testing.

<?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" , 9999) )
{
	$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 $remote_ip : $remote_port" . $buf , 100 , 0 , $remote_ip , $remote_port);
}

socket_close($sock);

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

$server = '127.0.0.1';
$port = 9999;

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)
	if(socket_recvfrom( $sock , $reply , 2045 , 0, $server, $port ) === FALSE)
	{
		$errorcode = socket_last_error();
		$errormsg = socket_strerror($errorcode);
		
		die("Could not receive data: [$errorcode] $errormsg \n");
	}
	
	echo "Reply : $reply";
//}

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