Проверка при отправке сообщения гостем.

        if (strlen($username) < 2)
            $errors[] = $lang_prof_reg['Username too short'];
        else if (!strcasecmp($username, 'Guest') || !strcasecmp($username, $lang_common['Guest']))
            $errors[] = $lang_prof_reg['Username guest'];
        else if (preg_match('/[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}/', $username))
            $errors[] = $lang_prof_reg['Username IP'];

        session_start();
        if (md5(strtoupper($_POST['req_image'])) != $_SESSION['text'])
            $errors[] = $lang_post['Text mismatch'];

        session_start();
        if (trim($_POST['req_image']) == '' || strtolower(trim($_POST['req_image'])) != strtolower($_SESSION['text']))
            $errors[] = $lang_post['Text mismatch'];

?>                        <label class="conl"><strong><?php echo $lang_post['Guest name'] ?></strong><br /><input type="text" name="req_username" value="<?php if (isset($_POST['req_username'])) echo pun_htmlspecialchars($username); ?>" size="25" maxlength="25" tabindex="<?php echo $cur_index++ ?>" /><br /></label>
                        <label class="conl"><?php echo $email_label ?><br /><input type="text" name="<?php echo $email_form_name ?>" value="<?php if (isset($_POST[$email_form_name])) echo pun_htmlspecialchars($email); ?>" size="50" maxlength="50" tabindex="<?php echo $cur_index++ ?>" /><br /></label>
                        <div class="clearer"></div>

<?php if ($pun_config['o_regs_verify_image'] == '1'): ?>
            <div class="inform">
                <fieldset>
                    <legend><?php echo $lang_post['Image verification'] ?></legend>
                    <div class="infldset">
                        <img src=ran.php><br />
                        <label class="conl"><strong><?php echo $lang_post['Image text'] ?></strong><br /><input type="text" name="req_image" size="16" maxlength="16" /><br /></label>
                        <p class="clearb"><?php echo $lang_post['Image info'] ?></p>
                    </div>
                </fieldset>
            </div>
<?php endif; ?>

//Image Verification stuff
'Image verification'         =>    'Ïðîâåðêà êàðòèíêè',
'Image text'                =>    'Òåêñò êàðòèíêè',
'Image info'                =>    'Ââåäèòå òåêñò ñ êàðòèíêè â îêíî ââîäà òåêñòà',
'Text mismatch'                =>    'Òåêñò è êàðòèíêà íå ñîâïàäàþò'