php สามารถเขียนตรวจสอบ port 3389 443 ที่สำหรับ rdp ได้มั้ยครับว่าเปิดอยู่ [php check port open]

<?php
function GetServerStatus($site, $port)
{
$status = array("OFFLINE", "ONLINE");
$fp = @fsockopen($site, $port, $errno, $errstr, 2);
if (!$fp) {
    return $status[0];
} else
  { return $status[1];}
}

echo GetServerStatus("192.168.105.103","443");

?>

<div id="show"></div><br/>
<input type="number" id="port" value="80" />

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script>
	$(function(){
		setInterval(function(){
        var getData=$.ajax({
                url:"detail.php",
                data:{port : $('#port').val()},
				type : "POST",
                async:false,
                success:function(result){
                    $("#show").html(result); 
                }
        }).responseText;
    	},2000);    
});
</script>

<?php
echo 'Port : '.$port=$_POST['port']."<br/>";

$status = array("OFFLINE", "ONLINE");
$fp = @fsockopen('www.google.com', $port, $errno, $errstr, 2);
if (!$fp) {
    echo $status[0];
}else{ 
	echo $status[1];
}
?>