XPATH 不适用于 HTML

发布于 2024-11-11 16:35:37 字数 26034 浏览 3 评论 0原文

我有一段代码,可以从本地 Web 服务器 localhost 读取 HTML 文件,然后使用 tidy 将其转换为 XHTML。然后我将该 XHTML 加载到我的 DOM 中。代码看起来像这样

<?php


function getXHTML($html)
{
    $options = array("output-html" => true,"quote-nbsp" => true, "drop-proprietary-attributes" => true,"drop-font-tags" => true,"drop-empty-paras" => true,"hide-comments" => true);
    $tidy=new tidy();
    $xhtml=$tidy->repairString($html,$options);
    echo $xhtml;
    return $xhtml;
}
$content = file_get_contents("http://localhost/filename.htm");
$page = new DOMDocument();
$xpath=new DOMXPath($page);
$content = getXHTML($content);   // this is a tidy function to return XHTML
$page->loadHTML($content);   
$totalPath = "//body/table[3]/tbody/tr[1]/td[4]";
$total = $xpath->query($totalPath);
echo $total->length;    // this shows zero
?> 

filename.htm 的内容看起来像这样

<!-- saved from url=(0041)http://www.rtu.ac.in/results/reformat.php -->
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="SHORTCUT ICON" href="http://www.rtu.ac.in/favicon.ico">
<link href="./Result - Rajasthan Technical University6_files/styleresults.css" rel="stylesheet" type="text/css">
<title>Result - Rajasthan Technical University</title>
</head>
<body>


<table width="773" cellpadding="5" cellspacing="0" align="center">
  <tbody><tr height="60">
    <td width="16%" height="60" valign="top"><font color="brown" size="+2"><img src="./Result - Rajasthan Technical University6_files/logo.jpg" width="100" height="102" border="0" align="right">&nbsp;</font></td>
    <td width="72%" height="60" align="center" valign="top"><p><font color="brown" size="+2"><strong>RAJASTHAN TECHNICAL UNIVERSITY </strong></font></p><font color="brown" size="+2">
      <p><font size="+1"><strong>B.Tech -IVth SEMESTER -2010(Main) 16.5.2011</strong></font></p><font size="+1">&nbsp;</font></font></td>      
    <td width="12%" height="80"><strong>www.rtu.ac.in</strong>&nbsp;</td>
  </tr>
</tbody></table>



<br>
<br>
<table width="783" align="center" cellpadding="5" cellspacing="0" class="table"> 
  <tbody>
    <tr>
      <td width="34%" align="center" valign="top" rowspan="2"><strong>Subject(s) Name </strong>&nbsp;</td>
      <td width="10%" align="center" valign="top" colspan="1" rowspan="2"> <strong>Subject(s) Code </strong>&nbsp;</td>

      <td align="center" valign="top" colspan="3" rowspan="1"><strong>Marks Obtained </strong>&nbsp;</td>
    </tr>


    <tr>
      <td width="20%" align="center"><strong>Internal</strong>&nbsp;</td>
      <td width="18%" align="center"><strong>Theory</strong>&nbsp;</td>
      <td width="18%" align="center">&nbsp;</td>
    </tr>




        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-1</strong>&nbsp;</td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4551</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> 16</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 50</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
      </tr>

        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-2</strong>&nbsp;</td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">&nbsp;4552</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> 17</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 61</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
      </tr>

        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-3</strong>&nbsp;</td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4553</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> 19</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 49</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
      </tr>
        <tr>
          <td align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-4</strong>&nbsp;</td>
          <td align="center" style=" border-bottom: 0px none transparent;">4554</td>
          <td align="center" style=" border-bottom: 0px none transparent;"> 14</td>
          <td align="center" style=" border-bottom: 0px none transparent;"> 68</td>
          <td align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
        </tr>
        <tr>
          <td align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-5</strong>&nbsp;</td>
          <td align="center" style=" border-bottom: 0px none transparent;">4555</td>
          <td align="center" style=" border-bottom: 0px none transparent;"> 14</td>
          <td align="center" style=" border-bottom: 0px none transparent;"> 36</td>
          <td align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
        </tr>

        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-6</strong>&nbsp;</td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4556</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> 19</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 48</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
      </tr><tr>
          <td align="center" style=" border-bottom: 0px none transparent;">&nbsp;&nbsp;</td>
          <td align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
          <td align="center" style=" border-bottom: 0px none transparent;">&nbsp;&nbsp;</td>
          <td align="center" style=" border-bottom: 0px none transparent;">&nbsp;<strong>Internal</strong>&nbsp;</td>
          <td width="18%" align="center" style=" border-bottom: 0px none transparent;"><strong>Practical</strong>&nbsp;</td>
        </tr>

        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>PSUBJECT-1</strong>&nbsp;</td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4174</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 29</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">48</td>
      </tr>




        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>PSUBJECT-2</strong>&nbsp;</td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4175</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 16</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">26</td>
      </tr>

      <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>PSUBJECT-3</strong>&nbsp;</td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4171</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 15</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">27</td>
      </tr>
      <tr>
        <td align="center" style=" border-bottom: 0px none transparent;"><strong>PSUBJECT-4</strong>&nbsp;</td>
        <td align="center" style=" border-bottom: 0px none transparent;">4172</td>
        <td align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
        <td align="center" style=" border-bottom: 0px none transparent;"> 17</td>
        <td align="center" style=" border-bottom: 0px none transparent;">29</td>
        </tr>
      <tr>
        <td align="center" style=" border-bottom: 0px none transparent;"><strong>PSUBJECT-5</strong>&nbsp;</td>
        <td align="center" style=" border-bottom: 0px none transparent;">4173</td>
        <td align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
        <td align="center" style=" border-bottom: 0px none transparent;"> 29</td>
        <td align="center" style=" border-bottom: 0px none transparent;">46</td>
        </tr>




        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>Disipline (Deca)</strong>&nbsp;</td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4176</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">&nbsp;</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">46</td>
      </tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr></tbody>
</table>

<br><table width="783" align="center" cellpadding="5" cellspacing="0" class="table">
  <tbody><tr>

    <td width="18%" align="center" valign="top"><strong>Practical Marks   </strong>&nbsp;</td>
    <td width="18%" align="center" valign="top">328</td>
    <td width="19%" align="center" valign="top"><strong>Theory Marks </strong>&nbsp;</td>
    <td width="19%" align="center" valign="top">411</td>
  </tr>

  <tr>
    <td width="18%" align="center"><strong>Institute Code   </strong>&nbsp;</td>
    <td width="18%" align="center"> 1229 </td>
    <td width="19%" align="center"><strong>DECCA </strong>&nbsp;</td>
    <td width="19%" align="center">4176</td>
  </tr>

  <tr>

    <td width="18%" align="center"><strong>Division   </strong>&nbsp;</td>
    <td width="18%" align="center"> PASS </td>
    <td width="19%" align="center"><strong>Grand Total </strong>&nbsp;</td>
    <td width="19%" align="center">739</td>
  </tr>
  </tbody></table>


&nbsp;&nbsp; 
<!-- Reformatter by Shashank Kumar Jain (CS, IIIrd Year, 2010-11) -->


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class="csscan-value"></td></tr><tr id="csscan-row-outline-style"><td id="csscan-property-outline-style" class="csscan-property">outline-style</td><td id="csscan-value-outline-style" class="csscan-value"></td></tr><tr id="csscan-row-outline-width"><td id="csscan-property-outline-width" class="csscan-property">outline-width</td><td id="csscan-value-outline-width" class="csscan-value"></td></tr><tr><th colspan="2" id="csscan-header-position" class="csscan-header">Positioning</th></tr><tr id="csscan-row-position"><td id="csscan-property-position" class="csscan-property">position</td><td id="csscan-value-position" class="csscan-value"></td></tr><tr id="csscan-row-top"><td id="csscan-property-top" class="csscan-property">top</td><td id="csscan-value-top" class="csscan-value"></td></tr><tr id="csscan-row-bottom"><td id="csscan-property-bottom" class="csscan-property">bottom</td><td id="csscan-value-bottom" class="csscan-value"></td></tr><tr id="csscan-row-right"><td id="csscan-property-right" class="csscan-property">right</td><td id="csscan-value-right" class="csscan-value"></td></tr><tr id="csscan-row-left"><td id="csscan-property-left" class="csscan-property">left</td><td id="csscan-value-left" class="csscan-value"></td></tr><tr id="csscan-row-float"><td id="csscan-property-float" class="csscan-property">float</td><td id="csscan-value-float" class="csscan-value"></td></tr><tr id="csscan-row-display"><td id="csscan-property-display" class="csscan-property">display</td><td id="csscan-value-display" class="csscan-value"></td></tr><tr id="csscan-row-clear"><td id="csscan-property-clear" class="csscan-property">clear</td><td id="csscan-value-clear" class="csscan-value"></td></tr><tr id="csscan-row-z-index"><td id="csscan-property-z-index" class="csscan-property">z-index</td><td id="csscan-value-z-index" class="csscan-value"></td></tr><tr><th colspan="2" id="csscan-header-list" class="csscan-header">List</th></tr><tr id="csscan-row-list-style-image"><td id="csscan-property-list-style-image" class="csscan-property">list-style-image</td><td id="csscan-value-list-style-image" class="csscan-value"></td></tr><tr id="csscan-row-list-style-type"><td id="csscan-property-list-style-type" class="csscan-property">list-style-type</td><td id="csscan-value-list-style-type" class="csscan-value"></td></tr><tr id="csscan-row-list-style-position"><td id="csscan-property-list-style-position" class="csscan-property">list-style-position</td><td id="csscan-value-list-style-position" class="csscan-value"></td></tr><tr><th colspan="2" id="csscan-header-table" class="csscan-header">Table</th></tr><tr id="csscan-row-vertical-align"><td id="csscan-property-vertical-align" class="csscan-property">vertical-align</td><td id="csscan-value-vertical-align" class="csscan-value"></td></tr><tr id="csscan-row-border-collapse"><td id="csscan-property-border-collapse" class="csscan-property">border-collapse</td><td id="csscan-value-border-collapse" class="csscan-value"></td></tr><tr id="csscan-row-border-spacing"><td id="csscan-property-border-spacing" class="csscan-property">border-spacing</td><td id="csscan-value-border-spacing" class="csscan-value"></td></tr><tr id="csscan-row-caption-side"><td id="csscan-property-caption-side" class="csscan-property">caption-side</td><td id="csscan-value-caption-side" class="csscan-value"></td></tr><tr id="csscan-row-empty-cells"><td id="csscan-property-empty-cells" class="csscan-property">empty-cells</td><td id="csscan-value-empty-cells" class="csscan-value"></td></tr><tr id="csscan-row-table-layout"><td id="csscan-property-table-layout" class="csscan-property">table-layout</td><td id="csscan-value-table-layout" class="csscan-value"></td></tr><tr><th colspan="2" id="csscan-header-effects" class="csscan-header">Effects</th></tr><tr id="csscan-row-text-shadow"><td id="csscan-property-text-shadow" class="csscan-property">text-shadow</td><td id="csscan-value-text-shadow" 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class="csscan-value"></td></tr></tbody></table></div></body></html>

上面的 XPath 是正确的,因为我已经用 FirePath 检查了它。谁能告诉我我做错了什么?

I have a code that reads an HTML file from my local web server localhost and then converts it to XHTML with tidy. Then i load that XHTML into my DOM. the code looks like this

<?php


function getXHTML($html)
{
    $options = array("output-html" => true,"quote-nbsp" => true, "drop-proprietary-attributes" => true,"drop-font-tags" => true,"drop-empty-paras" => true,"hide-comments" => true);
    $tidy=new tidy();
    $xhtml=$tidy->repairString($html,$options);
    echo $xhtml;
    return $xhtml;
}
$content = file_get_contents("http://localhost/filename.htm");
$page = new DOMDocument();
$xpath=new DOMXPath($page);
$content = getXHTML($content);   // this is a tidy function to return XHTML
$page->loadHTML($content);   
$totalPath = "//body/table[3]/tbody/tr[1]/td[4]";
$total = $xpath->query($totalPath);
echo $total->length;    // this shows zero
?> 

the contents of filename.htm looks like this

<!-- saved from url=(0041)http://www.rtu.ac.in/results/reformat.php -->
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="SHORTCUT ICON" href="http://www.rtu.ac.in/favicon.ico">
<link href="./Result - Rajasthan Technical University6_files/styleresults.css" rel="stylesheet" type="text/css">
<title>Result - Rajasthan Technical University</title>
</head>
<body>


<table width="773" cellpadding="5" cellspacing="0" align="center">
  <tbody><tr height="60">
    <td width="16%" height="60" valign="top"><font color="brown" size="+2"><img src="./Result - Rajasthan Technical University6_files/logo.jpg" width="100" height="102" border="0" align="right"> </font></td>
    <td width="72%" height="60" align="center" valign="top"><p><font color="brown" size="+2"><strong>RAJASTHAN TECHNICAL UNIVERSITY </strong></font></p><font color="brown" size="+2">
      <p><font size="+1"><strong>B.Tech -IVth SEMESTER -2010(Main) 16.5.2011</strong></font></p><font size="+1"> </font></font></td>      
    <td width="12%" height="80"><strong>www.rtu.ac.in</strong> </td>
  </tr>
</tbody></table>



<br>
<br>
<table width="783" align="center" cellpadding="5" cellspacing="0" class="table"> 
  <tbody>
    <tr>
      <td width="34%" align="center" valign="top" rowspan="2"><strong>Subject(s) Name </strong> </td>
      <td width="10%" align="center" valign="top" colspan="1" rowspan="2"> <strong>Subject(s) Code </strong> </td>

      <td align="center" valign="top" colspan="3" rowspan="1"><strong>Marks Obtained </strong> </td>
    </tr>


    <tr>
      <td width="20%" align="center"><strong>Internal</strong> </td>
      <td width="18%" align="center"><strong>Theory</strong> </td>
      <td width="18%" align="center"> </td>
    </tr>




        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-1</strong> </td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4551</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> 16</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 50</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> </td>
      </tr>

        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-2</strong> </td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;"> 4552</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> 17</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 61</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> </td>
      </tr>

        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-3</strong> </td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4553</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> 19</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 49</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> </td>
      </tr>
        <tr>
          <td align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-4</strong> </td>
          <td align="center" style=" border-bottom: 0px none transparent;">4554</td>
          <td align="center" style=" border-bottom: 0px none transparent;"> 14</td>
          <td align="center" style=" border-bottom: 0px none transparent;"> 68</td>
          <td align="center" style=" border-bottom: 0px none transparent;"> </td>
        </tr>
        <tr>
          <td align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-5</strong> </td>
          <td align="center" style=" border-bottom: 0px none transparent;">4555</td>
          <td align="center" style=" border-bottom: 0px none transparent;"> 14</td>
          <td align="center" style=" border-bottom: 0px none transparent;"> 36</td>
          <td align="center" style=" border-bottom: 0px none transparent;"> </td>
        </tr>

        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>SUBJECT-6</strong> </td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4556</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> 19</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 48</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> </td>
      </tr><tr>
          <td align="center" style=" border-bottom: 0px none transparent;">  </td>
          <td align="center" style=" border-bottom: 0px none transparent;"> </td>
          <td align="center" style=" border-bottom: 0px none transparent;">  </td>
          <td align="center" style=" border-bottom: 0px none transparent;"> <strong>Internal</strong> </td>
          <td width="18%" align="center" style=" border-bottom: 0px none transparent;"><strong>Practical</strong> </td>
        </tr>

        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>PSUBJECT-1</strong> </td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4174</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> </td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 29</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">48</td>
      </tr>




        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>PSUBJECT-2</strong> </td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4175</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> </td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 16</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">26</td>
      </tr>

      <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>PSUBJECT-3</strong> </td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4171</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> </td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> 15</td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">27</td>
      </tr>
      <tr>
        <td align="center" style=" border-bottom: 0px none transparent;"><strong>PSUBJECT-4</strong> </td>
        <td align="center" style=" border-bottom: 0px none transparent;">4172</td>
        <td align="center" style=" border-bottom: 0px none transparent;"> </td>
        <td align="center" style=" border-bottom: 0px none transparent;"> 17</td>
        <td align="center" style=" border-bottom: 0px none transparent;">29</td>
        </tr>
      <tr>
        <td align="center" style=" border-bottom: 0px none transparent;"><strong>PSUBJECT-5</strong> </td>
        <td align="center" style=" border-bottom: 0px none transparent;">4173</td>
        <td align="center" style=" border-bottom: 0px none transparent;"> </td>
        <td align="center" style=" border-bottom: 0px none transparent;"> 29</td>
        <td align="center" style=" border-bottom: 0px none transparent;">46</td>
        </tr>




        <tr>
          <td width="34%" align="center" style=" border-bottom: 0px none transparent;"><strong>Disipline (Deca)</strong> </td>
          <td width="10%" align="center" style=" border-bottom: 0px none transparent;">4176</td>

      <td width="20%" align="center" style=" border-bottom: 0px none transparent;"> </td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;"> </td>
      <td width="18%" align="center" style=" border-bottom: 0px none transparent;">46</td>
      </tr>
  <tr><td> </td><td> </td><td> </td><td> </td><td> </td></tr></tbody>
</table>

<br><table width="783" align="center" cellpadding="5" cellspacing="0" class="table">
  <tbody><tr>

    <td width="18%" align="center" valign="top"><strong>Practical Marks   </strong> </td>
    <td width="18%" align="center" valign="top">328</td>
    <td width="19%" align="center" valign="top"><strong>Theory Marks </strong> </td>
    <td width="19%" align="center" valign="top">411</td>
  </tr>

  <tr>
    <td width="18%" align="center"><strong>Institute Code   </strong> </td>
    <td width="18%" align="center"> 1229 </td>
    <td width="19%" align="center"><strong>DECCA </strong> </td>
    <td width="19%" align="center">4176</td>
  </tr>

  <tr>

    <td width="18%" align="center"><strong>Division   </strong> </td>
    <td width="18%" align="center"> PASS </td>
    <td width="19%" align="center"><strong>Grand Total </strong> </td>
    <td width="19%" align="center">739</td>
  </tr>
  </tbody></table>


   
<!-- Reformatter by Shashank Kumar Jain (CS, IIIrd Year, 2010-11) -->


<div id="csscan-wrapper" style="display: none; "><h2 id="csscan-header">element</h2><table id="csscan-table"><tbody><tr><th colspan="2" id="csscan-header-font" class="csscan-header">Font</th></tr><tr id="csscan-row-font-family"><td id="csscan-property-font-family" class="csscan-property">font-family</td><td id="csscan-value-font-family" class="csscan-value"></td></tr><tr id="csscan-row-font-size"><td id="csscan-property-font-size" class="csscan-property">font-size</td><td id="csscan-value-font-size" class="csscan-value"></td></tr><tr id="csscan-row-font-style"><td id="csscan-property-font-style" class="csscan-property">font-style</td><td id="csscan-value-font-style" class="csscan-value"></td></tr><tr id="csscan-row-font-variant"><td id="csscan-property-font-variant" class="csscan-property">font-variant</td><td id="csscan-value-font-variant" class="csscan-value"></td></tr><tr id="csscan-row-font-weight"><td id="csscan-property-font-weight" class="csscan-property">font-weight</td><td id="csscan-value-font-weight" class="csscan-value"></td></tr><tr id="csscan-row-letter-spacing"><td id="csscan-property-letter-spacing" class="csscan-property">letter-spacing</td><td id="csscan-value-letter-spacing" class="csscan-value"></td></tr><tr id="csscan-row-line-height"><td id="csscan-property-line-height" class="csscan-property">line-height</td><td id="csscan-value-line-height" class="csscan-value"></td></tr><tr id="csscan-row-text-decoration"><td id="csscan-property-text-decoration" class="csscan-property">text-decoration</td><td id="csscan-value-text-decoration" class="csscan-value"></td></tr><tr id="csscan-row-text-align"><td id="csscan-property-text-align" class="csscan-property">text-align</td><td id="csscan-value-text-align" class="csscan-value"></td></tr><tr id="csscan-row-text-indent"><td id="csscan-property-text-indent" class="csscan-property">text-indent</td><td id="csscan-value-text-indent" class="csscan-value"></td></tr><tr id="csscan-row-text-transform"><td id="csscan-property-text-transform" class="csscan-property">text-transform</td><td id="csscan-value-text-transform" class="csscan-value"></td></tr><tr id="csscan-row-white-space"><td id="csscan-property-white-space" class="csscan-property">white-space</td><td id="csscan-value-white-space" class="csscan-value"></td></tr><tr id="csscan-row-word-spacing"><td id="csscan-property-word-spacing" class="csscan-property">word-spacing</td><td id="csscan-value-word-spacing" class="csscan-value"></td></tr><tr id="csscan-row-color"><td id="csscan-property-color" class="csscan-property">color</td><td id="csscan-value-color" class="csscan-value"></td></tr><tr><th colspan="2" id="csscan-header-background" class="csscan-header">Background</th></tr><tr id="csscan-row-background-attachment"><td id="csscan-property-background-attachment" class="csscan-property">bg-attachment</td><td id="csscan-value-background-attachment" class="csscan-value"></td></tr><tr id="csscan-row-background-color"><td id="csscan-property-background-color" class="csscan-property">bg-color</td><td id="csscan-value-background-color" class="csscan-value"></td></tr><tr id="csscan-row-background-image"><td id="csscan-property-background-image" class="csscan-property">bg-image</td><td id="csscan-value-background-image" class="csscan-value"></td></tr><tr id="csscan-row-background-position"><td id="csscan-property-background-position" class="csscan-property">bg-position</td><td id="csscan-value-background-position" class="csscan-value"></td></tr><tr id="csscan-row-background-repeat"><td id="csscan-property-background-repeat" class="csscan-property">bg-repeat</td><td id="csscan-value-background-repeat" class="csscan-value"></td></tr><tr><th colspan="2" id="csscan-header-size" class="csscan-header">Box</th></tr><tr id="csscan-row-width"><td id="csscan-property-width" class="csscan-property">width</td><td id="csscan-value-width" class="csscan-value"></td></tr><tr id="csscan-row-height"><td id="csscan-property-height" class="csscan-property">height</td><td id="csscan-value-height" class="csscan-value"></td></tr><tr id="csscan-row-border-top"><td id="csscan-property-border-top" class="csscan-property">border-top</td><td id="csscan-value-border-top" class="csscan-value"></td></tr><tr id="csscan-row-border-right"><td id="csscan-property-border-right" class="csscan-property">border-right</td><td id="csscan-value-border-right" class="csscan-value"></td></tr><tr id="csscan-row-border-bottom"><td id="csscan-property-border-bottom" class="csscan-property">border-bottom</td><td id="csscan-value-border-bottom" class="csscan-value"></td></tr><tr id="csscan-row-border-left"><td id="csscan-property-border-left" class="csscan-property">border-left</td><td id="csscan-value-border-left" class="csscan-value"></td></tr><tr id="csscan-row-margin"><td id="csscan-property-margin" class="csscan-property">margin</td><td id="csscan-value-margin" class="csscan-value"></td></tr><tr id="csscan-row-padding"><td id="csscan-property-padding" class="csscan-property">padding</td><td id="csscan-value-padding" class="csscan-value"></td></tr><tr id="csscan-row-max-height"><td id="csscan-property-max-height" class="csscan-property">max-height</td><td id="csscan-value-max-height" class="csscan-value"></td></tr><tr id="csscan-row-min-height"><td id="csscan-property-min-height" class="csscan-property">min-height</td><td id="csscan-value-min-height" class="csscan-value"></td></tr><tr id="csscan-row-max-width"><td id="csscan-property-max-width" class="csscan-property">max-width</td><td id="csscan-value-max-width" class="csscan-value"></td></tr><tr id="csscan-row-min-width"><td id="csscan-property-min-width" class="csscan-property">min-width</td><td id="csscan-value-min-width" class="csscan-value"></td></tr><tr id="csscan-row-outline-color"><td id="csscan-property-outline-color" class="csscan-property">outline-color</td><td id="csscan-value-outline-color" class="csscan-value"></td></tr><tr id="csscan-row-outline-style"><td id="csscan-property-outline-style" class="csscan-property">outline-style</td><td id="csscan-value-outline-style" class="csscan-value"></td></tr><tr id="csscan-row-outline-width"><td id="csscan-property-outline-width" class="csscan-property">outline-width</td><td id="csscan-value-outline-width" class="csscan-value"></td></tr><tr><th colspan="2" id="csscan-header-position" class="csscan-header">Positioning</th></tr><tr id="csscan-row-position"><td id="csscan-property-position" class="csscan-property">position</td><td id="csscan-value-position" class="csscan-value"></td></tr><tr id="csscan-row-top"><td id="csscan-property-top" class="csscan-property">top</td><td id="csscan-value-top" class="csscan-value"></td></tr><tr id="csscan-row-bottom"><td id="csscan-property-bottom" class="csscan-property">bottom</td><td id="csscan-value-bottom" class="csscan-value"></td></tr><tr id="csscan-row-right"><td id="csscan-property-right" class="csscan-property">right</td><td id="csscan-value-right" class="csscan-value"></td></tr><tr id="csscan-row-left"><td id="csscan-property-left" class="csscan-property">left</td><td id="csscan-value-left" class="csscan-value"></td></tr><tr id="csscan-row-float"><td id="csscan-property-float" class="csscan-property">float</td><td id="csscan-value-float" class="csscan-value"></td></tr><tr id="csscan-row-display"><td id="csscan-property-display" class="csscan-property">display</td><td id="csscan-value-display" class="csscan-value"></td></tr><tr id="csscan-row-clear"><td id="csscan-property-clear" class="csscan-property">clear</td><td id="csscan-value-clear" class="csscan-value"></td></tr><tr id="csscan-row-z-index"><td id="csscan-property-z-index" class="csscan-property">z-index</td><td id="csscan-value-z-index" class="csscan-value"></td></tr><tr><th colspan="2" id="csscan-header-list" class="csscan-header">List</th></tr><tr id="csscan-row-list-style-image"><td id="csscan-property-list-style-image" class="csscan-property">list-style-image</td><td id="csscan-value-list-style-image" class="csscan-value"></td></tr><tr id="csscan-row-list-style-type"><td id="csscan-property-list-style-type" class="csscan-property">list-style-type</td><td id="csscan-value-list-style-type" class="csscan-value"></td></tr><tr id="csscan-row-list-style-position"><td id="csscan-property-list-style-position" class="csscan-property">list-style-position</td><td id="csscan-value-list-style-position" class="csscan-value"></td></tr><tr><th colspan="2" id="csscan-header-table" class="csscan-header">Table</th></tr><tr id="csscan-row-vertical-align"><td id="csscan-property-vertical-align" class="csscan-property">vertical-align</td><td id="csscan-value-vertical-align" class="csscan-value"></td></tr><tr id="csscan-row-border-collapse"><td id="csscan-property-border-collapse" class="csscan-property">border-collapse</td><td id="csscan-value-border-collapse" class="csscan-value"></td></tr><tr id="csscan-row-border-spacing"><td id="csscan-property-border-spacing" class="csscan-property">border-spacing</td><td id="csscan-value-border-spacing" class="csscan-value"></td></tr><tr id="csscan-row-caption-side"><td id="csscan-property-caption-side" class="csscan-property">caption-side</td><td id="csscan-value-caption-side" class="csscan-value"></td></tr><tr id="csscan-row-empty-cells"><td id="csscan-property-empty-cells" class="csscan-property">empty-cells</td><td id="csscan-value-empty-cells" class="csscan-value"></td></tr><tr id="csscan-row-table-layout"><td id="csscan-property-table-layout" class="csscan-property">table-layout</td><td id="csscan-value-table-layout" class="csscan-value"></td></tr><tr><th colspan="2" id="csscan-header-effects" class="csscan-header">Effects</th></tr><tr id="csscan-row-text-shadow"><td id="csscan-property-text-shadow" class="csscan-property">text-shadow</td><td id="csscan-value-text-shadow" class="csscan-value"></td></tr><tr id="csscan-row--webkit-box-shadow"><td id="csscan-property--webkit-box-shadow" class="csscan-property">-webkit-box-shadow</td><td id="csscan-value--webkit-box-shadow" class="csscan-value"></td></tr><tr id="csscan-row-border-radius"><td id="csscan-property-border-radius" class="csscan-property">border-radius</td><td id="csscan-value-border-radius" class="csscan-value"></td></tr><tr><th colspan="2" id="csscan-header-other" class="csscan-header">Other</th></tr><tr id="csscan-row-overflow"><td id="csscan-property-overflow" class="csscan-property">overflow</td><td id="csscan-value-overflow" class="csscan-value"></td></tr><tr id="csscan-row-cursor"><td id="csscan-property-cursor" class="csscan-property">cursor</td><td id="csscan-value-cursor" class="csscan-value"></td></tr><tr id="csscan-row-visibility"><td id="csscan-property-visibility" class="csscan-property">visibility</td><td id="csscan-value-visibility" class="csscan-value"></td></tr></tbody></table></div></body></html>

the XPath above is correct as i have checked it with FirePath. can anyone tell me what i am doing wrong?

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评论(3

逐鹿 2024-11-18 16:35:37

尝试使用 loadHTML($string)而不是 loadXML。来自手册:

该函数解析字符串源中包含的 HTML。与加载 XML 不同,加载 HTML 不需要格式正确。

更新 1

loadHTML 在内存中创建与 loadXML 相同的 DOM 树。它只使用不太严格的解析器。以下是使用 XPath 的示例代码:

<?php
$content = file_get_contents("1.html");
$page = new DOMDocument();
$page->loadHTML($content);   // this will ignore most errors in formating
echo $page->saveHTML();
echo "=====\n";
$xpath = new DOMXPath($page); // use any "XML" parsing function
foreach ($xpath->query("//li[not(@id='3')]") as $elem) {
        echo "[".trim($elem->textContent)."]\n";
}

1.html 文件的内容是:

<li id="1">item 1
<li id="2">item 2
<li id="3">item 3
<li id="4">item 4

输出将为:

<!DOCTYPE html PUBLIC "...">
<html><body>
<li id="1">item 1
</li>
<li id="2">item 2
</li>
<li id="3">item 3
</li>
<li id="4">item 4
</li>
</body></html>
=====
[item 1]
[item 2]
[item 4]

Update 2

您刚刚错过了 $xpath 变量的初始化。我还删除了 getXHTML 调用,因为它不是必需的:

$content = file_get_contents("2.html");
$page = new DOMDocument();
//$content=getXHTML($content); // no need this if you're using loadHTML
$page->loadHTML($content);
$totalPath = "//body/table[3]/tbody/tr[1]/td[4]";
$xpath = new DOMXPath($page); // creating $xpath object
$total = $xpath->query($totalPath);
echo "[",$total->length,"]";

Try to use loadHTML($string) instead of loadXML. From manual:

The function parses the HTML contained in the string source. Unlike loading XML, HTML does not have to be well-formed to load.

Update 1

loadHTML creates the same DOM tree in memory as loadXML does. It only uses less strict parser. Here is example code with XPath:

<?php
$content = file_get_contents("1.html");
$page = new DOMDocument();
$page->loadHTML($content);   // this will ignore most errors in formating
echo $page->saveHTML();
echo "=====\n";
$xpath = new DOMXPath($page); // use any "XML" parsing function
foreach ($xpath->query("//li[not(@id='3')]") as $elem) {
        echo "[".trim($elem->textContent)."]\n";
}

Content of 1.html file is:

<li id="1">item 1
<li id="2">item 2
<li id="3">item 3
<li id="4">item 4

Output will be:

<!DOCTYPE html PUBLIC "...">
<html><body>
<li id="1">item 1
</li>
<li id="2">item 2
</li>
<li id="3">item 3
</li>
<li id="4">item 4
</li>
</body></html>
=====
[item 1]
[item 2]
[item 4]

Update 2

You just missed initializing for $xpath variable. I've also removed getXHTML call, because it's not necessary:

$content = file_get_contents("2.html");
$page = new DOMDocument();
//$content=getXHTML($content); // no need this if you're using loadHTML
$page->loadHTML($content);
$totalPath = "//body/table[3]/tbody/tr[1]/td[4]";
$xpath = new DOMXPath($page); // creating $xpath object
$total = $xpath->query($totalPath);
echo "[",$total->length,"]";
抽个烟儿 2024-11-18 16:35:37

您对 PHP Tidy 选项 使用了多少?如果您收到的错误涉及实体(特别是 ),我想知道将数字实体设置为“on”或使用保留实体的值是否会有所帮助。

B计划:试试这个。 XPath 甚至可以处理格式不正确的 html 文件。

<?php 

$oldSetting = libxml_use_internal_errors( true ); 
libxml_clear_errors(); 

$html = new DOMDocument(); 
$html->loadHtmlFile(
    'myHtmlFile.html'); 

$xpath = new DOMXPath( $html ); 
$test = $xpath->query( "//div[@id='mydiv']" ); 

$div = $test->item(0);
echo $div->getAttribute('style');

libxml_clear_errors(); 
libxml_use_internal_errors( $oldSetting ); 
?>

How much have you played with the PHP Tidy options? If the error you get refers to entities (specifically  ) I wonder if setting numeric-entities "on" or playing with the value for preserve-entities would help.

Plan B: Try this. XPath worked even with poorly formed html files.

<?php 

$oldSetting = libxml_use_internal_errors( true ); 
libxml_clear_errors(); 

$html = new DOMDocument(); 
$html->loadHtmlFile(
    'myHtmlFile.html'); 

$xpath = new DOMXPath( $html ); 
$test = $xpath->query( "//div[@id='mydiv']" ); 

$div = $test->item(0);
echo $div->getAttribute('style');

libxml_clear_errors(); 
libxml_use_internal_errors( $oldSetting ); 
?>
Oo萌小芽oO 2024-11-18 16:35:37

上述问题的答案有些棘手。我的原始代码看起来与上面发生的情况类似

$xpath=new DOMXPath($page);
..
...
...
$page->loadHTML($content);
..
...
$totalPath = "//body/table[3]/tbody/tr[1]/td[4]";
$total = $xpath->query($totalPath);
...
...

,因为 $xpath 是在空文档上创建的,因为 html 仍未加载到 Dom 中。因此,当 xpath 运行任何查询时,它会在空文档上运行查询。
现在我更改了 2 个语句的顺序

...
...
$page->loadHTML($content);
$xpath=new DOMXPath($page);
...
...
$totalPath = "//body/table[3]/tbody/tr[1]/td[4]";
$total = $xpath->query($totalPath);

,现在它可以工作了,因为 $xpath 是在非空文档上创建的

the answer to the above question somewhat tricky. my original code looked something like

$xpath=new DOMXPath($page);
..
...
...
$page->loadHTML($content);
..
...
$totalPath = "//body/table[3]/tbody/tr[1]/td[4]";
$total = $xpath->query($totalPath);
...
...

what happens above is that $xpath is created on an empty document because the html is still not loaded in the Dom. so when xpath ran any query it ran the query on an empty document.
now i changed the order of the 2 statements

...
...
$page->loadHTML($content);
$xpath=new DOMXPath($page);
...
...
$totalPath = "//body/table[3]/tbody/tr[1]/td[4]";
$total = $xpath->query($totalPath);

now it works because $xpath is created on a nonempty document

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