$myFile = "ip2ban.txt";
$fh = fopen($myFile, 'r');
$theData = fread($fh, filesize($myFile));
fclose($fh);
$datatoban = explode(" ",$theData);
$i = 1;
while $datatoban[$i] {
.... here the procedure for ban the ip
... $datatoban[$i] ... $datatoban[$i + 1]
i += 2;
}