How to implement TCP port detection in php_PHP tutorial

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class Health {

public static $status;

public function __construct()

{

}

public function check($ip, $port){

$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

socket_set_nonblock($sock);

socket_connect($sock,$ip, $port);

socket_set_block($sock);

self::$status = socket_select($r = array($sock), $w = array($sock), $f = array($sock), 5);

return(self::$status);

}

public function checklist($lst){

}

public function status(){

switch(self::$status)

{

case 2:

echo "Closedn";

break;

case 1:

echo "Openningn";

break;

case 0:

echo "Timeoutn";

break;

}

}

}

$ip='192.168.2.10';

$port=80;

$health = new Health();

$health->check($ip, $port);

$health->status();