TCP connect() scanner with banner grab

tcp_banner_grab.php

<?php
$ports = range(20, 100);
$IP = "192.168.1.50";
$results = array();
foreach ($ports as $port) {
	$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
	socket_set_option($sock, SOL_SOCKET, SO_RCVTIMEO, array('sec'=>0, 'usec'=>100));
	socket_set_option($sock, SOL_SOCKET, SO_SNDTIMEO, array('sec'=>0, 'usec'=>100));
	if (@socket_connect($sock, $IP, $port)) {
		socket_recv($sock, $buffer, 1024, 0);
		$results[] = array($port, "OPEN", $buffer);
		echo($port . " - " . $buffer . "\n");
	} else {
		$results[] = array($port, "CLOSED", "");
		echo($port . " - " . "CLOSED" . "\n");		
	}
}
print_r($results);
	?>