2.8.1.2. Outgoing ports check script

To check availability outgoing ports, can run a script like this:

<?php
 
$host = 'portquiz.net';
$ports = array(80, 443, 465, 587);
 
foreach ($ports as $port) {
    $connection = @fsockopen($host, $port);
    if (is_resource($connection)) {
        $result = ' (' . getservbyport($port, 'tcp') . ') is open';
        fclose($connection);
    } else {
        $result = ' is not responding';
    }
    print($host . ': ' . $port . $result . '<br>');
}

• Line 3 specifies the address of the host to which connection attempts will be made. You can use public portquiz.net or specify the address of a specific host to be addressed.
• In line 4, in brackets, separated by commas, the port numbers are indicated, the availability of which should be checked.