php - 截屏你一生中见过的最丑陋的 HTML

Question

我正在使用 PHP 和 libtidy 来尝试对可能是历史上最可怕和格式最错误的 HTML 表格的使用进行屏幕抓取。该站点关闭了几个表格、tr、td、字体或粗体标记，并始终在表格中嵌套许多不同层的表格。

示例片段:

<center>
<table border="1" bordercolor="#000000" cellspacing="0" cellpadding="0">
<tr>
<td width="50%">
<center>
Home Team - <b>Wildcats<td>
<center>
Away Team - <b>Polar Bears<tr>
<td colspan="2">
<center>
<b><font size="+1">Rosters<tr>
<td valign="top">
<center>
<table border="0" cellspacing="0">
<tr>
<td>
<font size="2">1&nbsp;<td>
<font size="2">Baird, T<tr>
<td>
<font size="2">2&nbsp;<td>
<font size="2">Knight, P<tr>
<td>
<font size="2">8&nbsp;<td>
<font size="2">Miller, B<tr>
<td>
<font size="2">9&nbsp;<td>
<font size="2">Huebsch, B<tr>
<td>
<font size="2">11&nbsp;<td>
<font size="2">Buschmann, C<tr>
<td>
<font size="2">12&nbsp;<td>
<font size="2">Reding, J<tr>
<td>
<font size="2">14&nbsp;<td>
<font size="2">Simpson, S<tr>
<td>
<font size="2">27&nbsp;<td>
<font size="2">Kupferschmidt, M<tr>
<td>
<font size="2">28&nbsp;<td>
<font size="2">Anderson, D<tr>
<td>
<font size="2">31&nbsp;<td>
<font size="2">Gehrts, J<tr>
<td>
<font size="2">39&nbsp;<td>
<font size="2">McGinnis, G<tr>
<td>
<font size="2">42&nbsp;<td>
<font size="2">Temple, B<tr>
<td>
<font size="2">44&nbsp;<td>
<font size="2">Kemplin, A<tr>
<td>
<font size="2">77&nbsp;<td>
<font size="2">Weiner, B<tr>
<td>
<font size="2">95&nbsp;<td>
<font size="2">
Zytkoskie, D</table>
<td valign="top">
<center>
<table border="0" cellspacing="0">
<tr>
<td>
<font size="2">5&nbsp;<td>
<font size="2">Mack, A<tr>
<td>
<font size="2">8&nbsp;<td>
<font size="2">Foucault, R<tr>
<td>
<font size="2">11&nbsp;<td>
<font size="2">Oberpriller, D *<tr>
<td>
<font size="2">12&nbsp;<td>
<font size="2">Underwood, J<tr>
<td>
<font size="2">15&nbsp;<td>
<font size="2">Oberpriller, M<tr>
<td>
<font size="2">19&nbsp;<td>
<font size="2">Langfus, B<tr>
<td>
<font size="2">25&nbsp;<td>
<font size="2">Carroll, R<tr>
<td>
<font size="2">30&nbsp;<td>
<font size="2">Hirdler, T<tr>
<td>
<font size="2">33&nbsp;<td>
<font size="2">Gibson, S<tr>
<td>
<font size="2">35&nbsp;<td>
<font size="2">Marthaler, C<tr>
<td>
<font size="2">44&nbsp;<td>
<font size="2">Yurik, J<tr>
<td>
<font size="2">58&nbsp;<td>
<font size="2">
Gronemeyer, S</table>
<tr>
<td colspan="2">
<center>
<b><font size="+1">Goals<tr>
<td valign="top">
<center>
<table border="1" cellspacing="0" width="100%">
<td>
<b><font size="2">Player<td>
<b><font size="2">Period<td>
<b><font size="2">Time<td>
<b><font size="2">Assist 1<td>
<b><font size="2">Assist 2<td>
<b><font size="2">SH<td>
<b><font size="2">PP<tr>
<td nowrap>
<font size="2">Kupferschmidt,&nbsp;M<td>
<font size="2">1<td>
<font size="2">12:51<td nowrap>
<font size="2">Kemplin,&nbsp;A<td nowrap>
<font size="2">None<td>
<font size="2">
<center>
<td>
<font size="2">
<center>
<tr>
<td nowrap>
<font size="2">McGinnis,&nbsp;G<td>
<font size="2">1<td>
<font size="2">12:33<td nowrap>
<font size="2">Huebsch,&nbsp;B<td nowrap>
<font size="2">None<td>
<font size="2">
<center>
<td>
<font size="2">
<center>
<tr>
<td nowrap>
<font size="2">Kupferschmidt,&nbsp;M<td>
<font size="2">2<td>
<font size="2">16:01<td nowrap>
<font size="2">None<td nowrap>
<font size="2">None<td>
<font size="2">
<center>
<td>
<font size="2">
<center>
<tr>
<td nowrap>
<font size="2">Buschmann,&nbsp;C<td>
<font size="2">3<td>
<font size="2">00:38<td nowrap>
<font size="2">None<td nowrap>
<font size="2">None<td>
<font size="2">
<center>
<td>
<font size="2">
<center>
</table>
<td valign="top">
<center>
<table border="1" cellspacing="0" width="100%">
<td>
<b><font size="2">Player<td>
<b><font size="2">Period<td>
<b><font size="2">Time<td>
<b><font size="2">Assist 1<td>
<b><font size="2">Assist 2<td>
<b><font size="2">SH<td>
<b><font size="2">PP<tr>
<td nowrap>
<font size="2">Oberpriller,&nbsp;D *<td>
<font size="2">3<td>
<font size="2">12:31<td nowrap>
<font size="2">Gronemeyer,&nbsp;S<td nowrap>
<font size="2">None<td>
<font size="2">
<center>
<td>
<font size="2">
<center>
</table>
<tr>
<td colspan="2">
<center>
<b><font size="+1">Penalties<tr>
<td valign="top">
<center>
<table border="1" cellspacing="0" width="100%">
<td>
<b><font size="2">Player<td>
<font size="2"><b>Period<td>
<font size="2"><b>Minutes<td>
<font size="2"><b>Offense<td>
<font size="2"><b>Start<td>
<font size="2"><b>Expired<tr>
<td nowrap>
<font size="2">Buschmann,&nbsp;C<td>
<font size="2">
<center>
3<td>
<font size="2">
<center>
2<td>
<font size="2">Interference<td>
<font size="2">11:11<td>
<font size="2">09:11<tr>
<td nowrap>
<font size="2">Buschmann,&nbsp;C<td>
<font size="2">
<center>
3<td>
<font size="2">
<center>
2<td>
<font size="2">Unsportmanlike Conduct<td>
<font size="2">03:26<td>
<font size="2">01:26<tr>
<td nowrap>
<font size="2">Bench<td>
<font size="2">
<center>
3<td>
<font size="2">
<center>
2<td>
<font size="2">Too Many Men<td>
<font size="2">01:46<td>
<font size="2">
00:00</table>
<td valign="top">
<center>
<table border="1" cellspacing="0" width="100%">
<td>
<b><font size="2">Player<td>
<font size="2"><b>Period<td>
<font size="2"><b>Minutes<td>
<font size="2"><b>Offense<td>
<font size="2"><b>Start<td>
<font size="2"><b>Expired<tr>
<td nowrap>
<font size="2">Marthaler,&nbsp;C<td>
<font size="2">
<center>
1<td>
<font size="2">
<center>
2<td>
<font size="2">Interference<td>
<font size="2">01:19<td>
<font size="2">16:19<tr>
<td nowrap>
<font size="2">Underwood,&nbsp;J<td>
<font size="2">
<center>
2<td>
<font size="2">
<center>
2<td>
<font size="2">Interference<td>
<font size="2">12:32<td>
<font size="2">10:32<tr>
<td nowrap>
<font size="2">Marthaler,&nbsp;C<td>
<font size="2">
<center>
3<td>
<font size="2">
<center>
2<td>
<font size="2">Interference<td>
<font size="2">11:39<td>
<font size="2">
09:39</table>
<tr>
<td colspan="2">
<center>
<font size="+1"><b>Goalies<tr>
<td>
<center>
<table border="1" cellspacing="0" width="100%">
<td>
<b><font size="2">Name<td>
<font size="2"><b>Shots<td>
<font size="2"><b>Goals<tr>
<td>
<font size="2">Baird,&nbsp;T<td>
<font size="2">20<td>
<font size="2">1<tr>
<td>
<font size="2"><b>Open Net<td>
<td>
<font size="2">
0</table>
<td>
<center>
<table border="1" cellspacing="0" width="100%">
<td>
<b><font size="2">Name<td>
<font size="2"><b>Shots<td>
<font size="2"><b>Goals<tr>
<td>
<font size="2">Hirdler,&nbsp;T<td>
<font size="2">42<td>
<font size="2">

神奇的是，所有浏览器似乎都能很好地呈现它。PHPTidy 设法很好地理解了这一切，但是表格嵌套得太深而且几乎是随机的，以至于使用 DOM XPath 遍历它真的很难。

是否有人对采用此方法的其他方法有任何建议？

事后分析:在喝了太多比利时小麦啤酒并弄脏了我的代码之后，我通过 strip_tags() 删除了除表、tr 和 td 之外的所有标签，然后运行，得到了很好的结果它通过 libtidy。它现在的格式很漂亮，而且很容易遍历。在将其发送到解析器之前，它似乎只需要一点点处理。

Answer 1

您可以使用一些技巧来清理表格等高度可预测的结构。在运行 HTML tidy 之前，您可以使用 Regex 或其他工具搜索 <tr>的和<td>之后是另一个 <tr>或 <td> , 并在其前面插入相应的闭合器。在 <td> 中容纳表格有一些额外的技巧。但没有什么是无法处理的。只需从找到最里面的结构并从那里向外移动即可。

真正的谜题是像 unclosed <div> 这样的东西的和<p>的，这可能更难与相应的(或缺少的)闭包器匹配。