check_ports.php

<?php

$ips = [
    '127.0.0.1',
];

$ports = [
    20 => 'FTP data',
    21 => 'FTP control port',
    22 => 'SSH',
    23 => 'Telnet <= Insecure, not recommended for most uses',
    25 => 'SMTP',
    43 => 'WHOIS protocol',
    53 => 'DNS services',
    67 => 'DHCP server port',
    68 => 'DHCP client port',
    80 => 'HTTP traffic <= Normal web traffic',
    110 => 'POP3 mail port',
    113 => 'Ident authentication services on IRC networks',
    143 => 'IMAP mail port',
    161 => 'SNMP',
    194 => 'IRC',
    389 => 'LDAP port',
    443 => 'HTTPS <= Secure web traffic',
    587 => 'SMTP <= message submission port',
    631 => 'CUPS printing daemon port',
    666 => 'DOOM <= This legacy FPS game actually has its own special port',
    3306 => 'MySQL',
    6379 => 'Redis',
    5432 => 'PosqtgeSQL',
];

//$ports = range(1, 5e3);

function stest($ip, $portt)
{
    $fp = @fsockopen($ip, $portt, $errno, $errstr, 0.1);
    if (!$fp) {
        return false;
    } else {
        fclose($fp);

        return true;
    }
}

foreach ($ips as $ip) {
    foreach ($ports as $port => $port_description) {
        if (stest($ip, $port)) {
            var_dump(str_pad($ip.':'.$port, 25).$port_description);
        }
    }
}