function deny() { if (!file_exists('blocked_ips.txt')) { $deny_ips = array( '127.0.0.1', '192.168.1.1', '83.76.27.9', '192.168.1.163' ); } else { $deny_ips = file('blocked_ips.txt'); } // read user ip adress: $ip = isset($_SERVER['REMOTE_ADDR']) ? trim($_SERVER['REMOTE_ADDR']) : ''; // search current IP in $deny_ips arrayif if ((array_search($ip, $deny_ips)) !== FALSE) { // address is blocked: echo 'Your IP adress (' . $ip . ') was blocked!'; exit; } }