function form($title = "→ retype that here", $more = "<small>Enter the correct letters and numbers from the image into the text box. This small test serves as access restriction against malicious bots. Simply reload the page if this graphic is too hard to read.</small>")
{
$pw = captcha::mkpass();
$hash = captcha::hash($pw);
$maxsize = strpos("MSIE", $_SERVER["HTTP_USER_AGENT"]) ? 3000 : 6000;
@header("Vary: User-Agent");
$img = "data:image/jpeg;base64," . base64_encode(captcha::image($pw, 200, 60, CAPTCHA_INVERSE, $maxsize));
$alt = htmlentities(captcha::textual_riddle($pw));
$html = '<table border="0" summary="captcha input"><tr>' . '<td><img name="captcha_image" id="captcha_image" src="' . $img . '" height="60" width="200" alt="' . $alt . '" /></td>' . '<td>' . $title . '<br/><input name="captcha_hash" type="hidden" value="' . $hash . '" />' . '<input name="captcha_input" type="text" size="7" maxlength="16" style="height:46px; font-size:34px; font-weight:450;" />' . '</td><td>' . $more . '</td>' . '</tr></table>';
$base = "http://{$_SERVER['SERVER_NAME']}:{$_SERVER['SERVER_PORT']}/" . substr(realpath(__FILE__), strlen($_SERVER["DOCUMENT_ROOT"]));
$html .= <<<END
<script language="Javascript"><!--
if (/Microsoft/.test(navigator.appName)) {
var img = document.captcha_image;
img.src = "{$base}?_ddu=" + img.src.substr(23);
} //--></script>
END;
$html = "<div class=\"captcha\">{$html}</div>";
return $html;
}
function form()
{
#-- stop if user already verified
if (!empty($_COOKIE[CAPTCHA_COOKIE]) && $_COOKIE[CAPTCHA_COOKIE] == (int) (time() / 1000000)) {
return "";
}
$title = translate('Enter Characters Seen in Graphic');
$more = translate('Enter the correct letters and numbers from the image into the text box...');
#-- prepare image text
$pw = captcha::mkpass();
$hash = captcha::hash($pw);
//$alt = htmlentities(captcha::textual_riddle($pw));
$alt = $title;
#-- image
$img = captcha::image($pw, 200, 60, CAPTCHA_INVERSE, CAPTCHA_MAXSIZE);
if (CAPTCHA_DATA_URLS && !strpos('MSIE', $_SERVER['HTTP_USER_AGENT'])) {
$img_fn = 'data:image/jpeg;base64,' . base64_encode($img);
} else {
$img_fn = CAPTCHA_TEMP_DIR . '/' . captcha::store_image($img) . '.jpg';
}
//echo $img_fn;
#-- emit html form
$html = '
<div class="captcha">
<fieldset style="width:420px">
<legend>' . translate('Challenge/Response') . '</legend>
<table border="0" summary="captcha input" width="400px"><tr>
<td colspan="2"><small>' . $more . '</small></td></tr><tr>
<td><img name="captcha_image" id="captcha_image" src="' . $img_fn . '" height="60" width="200" alt="' . $alt . '" /></td>
<td>' . $title . '<br /><input name="captcha_hash" type="hidden" value="' . $hash . '" />
<input name="captcha_input" type="text" size="7" maxlength="16" style="height:46px;font-size:34px; font-weight:bold;" />
</td></tr></table>
</fieldset>
</div>
';
return $html;
}
