<?php
$mac="00:1d:92:23:45:d5";
$ip=$_SERVER['REMOTE_ADDR'];
$mac=shell_exec("ping $ip -c 1 1>/dev/null && /usr/sbin/arp | grep $ip | grep -oh [0-9a-f][0-9a-f][:-][0-9a-f][0-9a-f][:-][0-9a-f][0-9a-f][:-][0-9a-f][0-9a-f][:-][0-9a-f][0-9a-f][:-][0-9a-f][0-9a-f]");
$maccheck=shell_exec("cat /var/www/IPs | grep $mac");
echo $ip;
echo $mac;
ob_end_clean();
if ( $maccheck == '' ) {
echo("you may pass! please click the button below");
echo("<form method='post' action='$PORTAL_ACTION$'>
<input type='hidden' name='redirurl' value='$PORTAL_REDIRURL$'>
<input name='accept' type='submit' value='Start browsing the web!'>
</form>");
echo $mac;
$file=fopen("/var/www/IPs", "a");
$output=fwrite($file, $mac);
} else {
echo("YOU MAY NOT PASS!");
}
?>