PHP Script to check for open ports

Here is a simple PHP script that you can use to test if a port is open on the server or not.

<?php


$host = $_SERVER['SERVER_ADDR'];
$ports = array(21, 25, 80, 81, 110, 443, 3306);
 
foreach ($ports as $port)
{
    $connection = @fsockopen($host, $port);
 
    if (is_resource($connection))
    {
        echo '<h2>' . $host . ':' . $port . ' ' . '(' . getservbyport($port, 'tcp') . ') is open.</h2>' . "\n";
 
        fclose($connection);
    }
 
    else
    {
        echo '<h2>' . $host . ':' . $port . ' is not responding.</h2>' . "\n";
    }
}
?>

And if you want to check for open ports on another server, get it’s IP address and put it instead of the $_SERVER[‘SERVER_ADDR’]; like this:

$host = $_SERVER['SERVER_ADDR'];
$host = '142.250.190.46';

Create a new file e.g. port-check.php and put the above snippet inside then open it in your browser. that’s it.

The output will be similar to this: