Просмотр поста

function is_remote_image($picture_remote_host)
{
    $handle = fopen($picture_remote_host, 'rb');
    if ($handle) {
        $six_bytes = fread($handle, 6);
        fclose($handle);
        if ($six_bytes === false) {
            return false;
        }
        if (substr($six_bytes, 0, 3) == "\xff\xd8\xff") {
            return 'image/jpeg';
        }
        if ($six_bytes == "\x89PNG\x0d\x0a") {
            return 'image/png';
        }
        if ($six_bytes == "GIF87a" || $six_bytes == "GIF89a") {
            return 'image/gif';
        }
    }
    return false;
}
function _img_njobo($var)
{
    return preg_replace_callback('#\[img\](.*?)\[/img\]#si', function ($img) {
        if (!is_remote_image($img[1])) {
            return '<strong class="red">[BROKEN IMAGE]</strong>';
        } else {
            return '<img src="' . $img[1] . '" alt=""/>';
        }
    }, $var);
}