dedecms 游客投稿

// 示例代码：检查游客投稿功能是否开启
if ($cfg['guestpost'] == 'Y') {
    // 游客投稿功能已开启
} else {
    // 游客投稿功能未开启
}

// 示例代码：生成验证码
session_start();
$code = rand(1000, 9999);
$_SESSION['captcha'] = $code;

// 输出验证码图片
header('Content-type: image/png');
$image = imagecreatetruecolor(60, 20);
$bgColor = imagecolorallocate($image, 255, 255, 255);
$textColor = imagecolorallocate($image, 0, 0, 0);
imagefilledrectangle($image, 0, 0, 60, 20, $bgColor);
imagestring($image, 5, 10, 5, $code, $textColor);
imagepng($image);
imagedestroy($image);

// 示例代码：过滤恶意代码
function filterMaliciousCode($content) {
    $pattern = '/<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/i';
    return preg_replace($pattern, '', $content);
}

$content = $_POST['content'];
$filteredContent = filterMaliciousCode($content);