[acool@localhost websocket-fun]$ 
[acool@localhost websocket-fun]$ # start websocket application
[acool@localhost websocket-fun]$ php -q server.php 

<?php
$host = 'localhost'; //host
$port = '9000'; //port
$null = NULL; //null var

//Create TCP/IP sream socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
//reuseable port
socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1);

//bind socket to specified host
socket_bind($socket, 0, $port);

//listen to port
socket_listen($socket);

//create & add listning socket to the list
$clients = array($socket);

//start endless loop, so that our script doesn't stop
while (true)
{
	//manage multipal connections
	$changed = $clients;
	//returns the socket resources in $changed array
	socket_select($changed, $null, $null, 0, 10);
	
	//check for new socket
	if (in_array($socket, $changed))
	{
		$socket_new = socket_accept($socket); //accpet new socket
		$clients[] = $socket_new; //add socket to client array
		
		$header = socket_read($socket_new, 1024); //read data sent by the socket
		perform_handshaking($header, $socket_new, $host, $port); //perform websocket handshake
		
		socket_getpeername($socket_new, $ip); //get ip address of connected socket
		$response = mask(json_encode(array('type'=>'system', 'message'=>$ip.' connected'))); //prepare json data
		send_message($response); //notify all users about new connection
		
		//make room for new socket
		$found_socket = array_search($socket, $changed);
		unset($changed[$found_socket]);
	}
	
	//loop through all connected sockets
	foreach ($changed as $changed_socket)
	{
		
		//check for any incomming data
		while(socket_recv($changed_socket, $buf, 1024, 0) >= 1)
		{
			$received_text = unmask($buf); //unmask data
			$tst_msg       = json_decode($received_text); //json decode 
			$user_name     = $tst_msg->name; //sender name
			$user_message  = $tst_msg->message; //message text
			$user_color    = $tst_msg->color; //color
			
			//prepare data to be sent to client
			$response_text = mask(json_encode(array('type'=>'usermsg', 'name'=>$user_name, 'message'=>$user_message, 'color'=>$user_color)));
			send_message($response_text); //send data
			break 2; //exist this loop
		}
		
		$buf = @socket_read($changed_socket, 1024, PHP_NORMAL_READ);
		if ($buf === false)
		{ // check disconnected client
			// remove client for $clients array
			$found_socket = array_search($changed_socket, $clients);
			socket_getpeername($changed_socket, $ip);
			unset($clients[$found_socket]);
			
			//notify all users about disconnected connection
			$response = mask(json_encode(array('type'=>'system', 'message'=>$ip.' disconnected')));
			send_message($response);
		}
	}
}
// close the listening socket
socket_close($socket);

function send_message($msg)
{
	global $clients;
	foreach($clients as $changed_socket)
	{
		@socket_write($changed_socket,$msg,strlen($msg));
	}
	return true;
}


//Unmask incoming framed message
function unmask($text)
{
	$length = ord($text[1]) & 127;
	if($length == 126) {
		$masks = substr($text, 4, 4);
		$data = substr($text, 8);
	}
	elseif($length == 127) {
		$masks = substr($text, 10, 4);
		$data = substr($text, 14);
	}
	else {
		$masks = substr($text, 2, 4);
		$data = substr($text, 6);
	}
	$text = "";
	for ($i = 0; $i < strlen($data); ++$i) {
		$text .= $data[$i] ^ $masks[$i%4];
	}
	return $text;
}

//Encode message for transfer to client.
function mask($text)
{
	$b1 = 0x80 | (0x1 & 0x0f);
	$length = strlen($text);
	
	if($length <= 125)
		$header = pack('CC', $b1, $length);
	elseif($length > 125 && $length < 65536)
		$header = pack('CCn', $b1, 126, $length);
	elseif($length >= 65536)
		$header = pack('CCNN', $b1, 127, $length);
	return $header.$text;
}

//handshake new client.
function perform_handshaking($receved_header,$client_conn, $host, $port)
{
	$headers = array();
	$lines = preg_split("/\r\n/", $receved_header);
	foreach($lines as $line)
	{
		$line = chop($line);
		if(preg_match('/\A(\S+): (.*)\z/', $line, $matches))
		{
			$headers[$matches[1]] = $matches[2];
		}
	}

	$secKey = $headers['Sec-WebSocket-Key'];
	$secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
	//hand shaking header
	$upgrade  = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" .
	"Upgrade: websocket\r\n" .
	"Connection: Upgrade\r\n" .
	"WebSocket-Origin: $host\r\n" .
//	"WebSocket-Location: ws://$host:$port/demo/shout.php\r\n".
	"Sec-WebSocket-Accept:$secAccept\r\n\r\n";
	socket_write($client_conn,$upgrade,strlen($upgrade));
}

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style type="text/css">

.panel{

	
margin-right: 3px;
}

.button {
    background-color: #4CAF50;
    border: none;
    color: white;
	margin-right: 30%;   
	margin-left: 30%;
    text-decoration: none;
    display: block;
    font-size: 16px;
    cursor: pointer;
	width:30%;
    height:40px;
	margin-top: 5px;
	 
}
input[type=text]{
		width:100%;
		margin-top:5px;
		
	}


.chat_wrapper {
	width: 70%;
	height:472px;
	margin-right: auto;
	margin-left: auto;
	background: #3B5998;
	border: 1px solid #999999;
	padding: 10px;
	font: 14px 'lucida grande',tahoma,verdana,arial,sans-serif;
}
.chat_wrapper .message_box {
	background: #F7F7F7;
	height:350px;
		overflow: auto;
	padding: 10px 10px 20px 10px;
	border: 1px solid #999999;
}
.chat_wrapper  input{
	//padding: 2px 2px 2px 5px;
}
.system_msg{color: #BDBDBD;font-style: italic;}
.user_name{font-weight:bold;}
.user_message{color: #88B6E0;}

@media only screen and (max-width: 720px) {
    /* For mobile phones: */
    .chat_wrapper {
        width: 95%;
	height: 40%;
	}
    

	.button{ width:100%;
	margin-right:auto;   
	margin-left:auto;
	height:40px;}
	
	
	
	
	
				
}

</style>
</head>
<body>	
<?php 
$colours = array('007AFF','FF7000','FF7000','15E25F','CFC700','CFC700','CF1100','CF00BE','F00');
$user_colour = array_rand($colours);
?>


<script src="jquery-3.1.1.js"></script>


<script language="javascript" type="text/javascript">  
$(document).ready(function(){
	//create a new WebSocket object.
	var wsUri = "ws://localhost:9000/demo/server.php"; 	
	websocket = new WebSocket(wsUri); 
	
	websocket.onopen = function(ev) { // connection is open 
		$('#message_box').append("<div class=\"system_msg\">Connected!</div>"); //notify user
	}

	$('#send-btn').click(function(){ //use clicks message send button	
		var mymessage = $('#message').val(); //get message text
		var myname = $('#name').val(); //get user name
		
		if(myname == ""){ //empty name?
			alert("Enter your Name please!");
			return;
		}
		if(mymessage == ""){ //emtpy message?
			alert("Enter Some message Please!");
			return;
		}
		document.getElementById("name").style.visibility = "hidden";
		
		var objDiv = document.getElementById("message_box");
		objDiv.scrollTop = objDiv.scrollHeight;
		//prepare json data
		var msg = {
		message: mymessage,
		name: myname,
		color : '<?php echo $colours[$user_colour]; ?>'
		};
		//convert and send data to server
		websocket.send(JSON.stringify(msg));
	});
	
	//#### Message received from server?
	websocket.onmessage = function(ev) {
		var msg = JSON.parse(ev.data); //PHP sends Json data
		var type = msg.type; //message type
		var umsg = msg.message; //message text
		var uname = msg.name; //user name
		var ucolor = msg.color; //color

		if(type == 'usermsg') 
		{
			$('#message_box').append("<div><span class=\"user_name\" style=\"color:#"+ucolor+"\">"+uname+"</span> : <span class=\"user_message\">"+umsg+"</span></div>");
		}
		if(type == 'system')
		{
			$('#message_box').append("<div class=\"system_msg\">"+umsg+"</div>");
		}
		
		$('#message').val(''); //reset text
		
		var objDiv = document.getElementById("message_box");
		objDiv.scrollTop = objDiv.scrollHeight;
	};
	
	websocket.onerror	= function(ev){$('#message_box').append("<div class=\"system_error\">Error Occurred - "+ev.data+"</div>");}; 
	websocket.onclose 	= function(ev){$('#message_box').append("<div class=\"system_msg\">Connection Closed</div>");}; 
});




</script>
<div class="chat_wrapper">
<div class="message_box" id="message_box"></div>
<div class="panel">
<input type="text" name="name" id="name" placeholder="Your Name" maxlength="15" />

<input type="text" name="message" id="message" placeholder="Message" maxlength="80" 
onkeydown = "if (event.keyCode == 13)document.getElementById('send-btn').click()"  />





</div>

<button id="send-btn" class=button>Send</button>

</div>

</body>
</html>

<?php
$numbers=array (
  '1',
  '2',
  '3',
  '4',
  '5',
  '6',
  '7',
  '8',
  '9',
  '10',
  '11',
);

$output = array();

foreach($numbers as $i=>$number)
{
    $output[]= $number;

    if(($i+1) % 3  == 0 || $i==count($numbers)-1)//last key
    {
        var_dump($output);
        $output=array();
    }
}

array(3) {
  [0]=>
  string(1) "1"
  [1]=>
  string(1) "2"
  [2]=>
  string(1) "3"
}
array(3) {
  [0]=>
  string(1) "4"
  [1]=>
  string(1) "5"
  [2]=>
  string(1) "6"
}
array(3) {
  [0]=>
  string(1) "7"
  [1]=>
  string(1) "8"
  [2]=>
  string(1) "9"
}
array(2) {
  [0]=>
  string(2) "10"
  [1]=>
  string(2) "11"
}

Array
(
    [0] => 6
    [1] => 7
    [2] => 8
    [3] => 9
    [4] => 10
    [5] => 11
    [6] => 12
    [7] => 13
    [8] => 14
    [9] => 15
)

function PaginateArray($input, $page, $show_per_page) {

  $page = $page < 1 ? 1 : $page;

  $start = ($page - 1) * ($show_per_page);
  $offset = $show_per_page;

  $outArray = array_slice($input, $start, $offset);

  var_export($outArray);
 }

  $input =   array("1","2","3","4","5","6","7","8","9","10","11","12","13","14","15","16","17","18","19","20");

  //page 1
  PaginateArray($input, 1, 3);//inputs: array, page, records per page
 /*
  array (
   0 => '1',
   1 => '2',
   2 => '3',
 )
  */

  //page 2
  PaginateArray($input, 2, 3);//inputs: array, page, records per page
 /*
 array (
  0 => '4',
  1 => '5',
  2 => '6',
)
 */

//HTML:
<form action="getCSV.php" method ="post" > 
<input type="hidden" name="csv_text" id="csv_text">
<input type="submit" value="Get CSV File" 
   onclick="getCSVData()"
</form>
<script>
function getCSVData(){
  var csv_value=$('#tableID').table2CSV({delivery:'value'});
  $("#csv_text").val(csv_value);  
}
</script>

//php
<?php
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=\"my-data.csv\"");
$data=stripcslashes($_REQUEST['csv_text']);
echo $data; 
?>

$csv='...CSV file (string) exported from open office spread sheet';

$lines = explode("\n", $csv);

$array = array();
foreach ($lines as $line) {
    $array =str_getcsv($line);
	
echo "INSERT INTO TestTable SET `Field1`='".addslashes($array[3])."',
`Field2`='".addslashes($array[3])."',";
	
}

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