Sniffer::feed_or_html(): string

186    public function feed_or_html()187    {188        $body = $this->file->get_body_content();189 190        $len = strlen($body);191        $pos = strspn($body, "\x09\x0A\x0D\x20\xEF\xBB\xBF");192 193        while ($pos < $len) {194            switch ($body[$pos]) {195                case "\x09":196                case "\x0A":197                case "\x0D":198                case "\x20":199                    $pos += strspn($body, "\x09\x0A\x0D\x20", $pos);200                    continue 2;201 202                case '<':203                    $pos++;204                    break;205 206                default:207                    return 'text/html';208            }209 210            if (substr($body, $pos, 3) === '!--') {211                $pos += 3;212                if ($pos < $len && ($pos = strpos($body, '-->', $pos)) !== false) {213                    $pos += 3;214                } else {215                    return 'text/html';216                }217            } elseif (substr($body, $pos, 1) === '!') {218                if ($pos < $len && ($pos = strpos($body, '>', $pos)) !== false) {219                    $pos++;220                } else {221                    return 'text/html';222                }223            } elseif (substr($body, $pos, 1) === '?') {224                if ($pos < $len && ($pos = strpos($body, '?>', $pos)) !== false) {225                    $pos += 2;226                } else {227                    return 'text/html';228                }229            } elseif (substr($body, $pos, 3) === 'rss'230                || substr($body, $pos, 7) === 'rdf:RDF') {231                return 'application/rss+xml';232            } elseif (substr($body, $pos, 4) === 'feed') {233                return 'application/atom+xml';234            } else {235                return 'text/html';236            }237        }238 239        return 'text/html';240    }