flood check

    /*
    - Add to Floodcheck
    - Used when entering user input into the database to tell the Floodcheck how many
      seconds passed since the user posted something to prevent spamming and flooding.

    $ip     - The IP to add to the floodcheck, default is the user's IP
    */

    public function addFloodCheck($ip = null) {
        $file = fopen("Floodcheck.txt", "r");

        if ($ip == null)
            $ip = $_SERVER['REMOTE_ADDR'];

        $floodFile = '';
        $found = false;

        // sort each line addresses
        while (($line = fgets($file)) !== false) {
            $line = trim($line);
            $flood = explode(",", $line);

            // check if ip matches ours
            if ($flood[0] == $ip) {
                $found = true;
                $floodFile .= $ip . ',' . time() . '' . PHP_EOL;
            } else
                $floodFile .= $flood[0] . ',' . $flood[1] . '' . PHP_EOL;
        }

        if (!$found)
            $floodFile .= $ip . ',' . time() . '';

        fclose($file);

        // update flood check file
        $file = fopen("Floodcheck.txt", "w+");
        fwrite($file, $floodFile);
        fclose($file);
    }