How to convert html table columns to table rows, dom object, php
Question
I've an html table and i want to convert its columns to rows. Columns can contain plan text, form elements(input, select, checkbox), or html tags(span, div). Consider the following html:
<html>
<body>
<table>
<tr>
<td>Cell 1</td>
<td>Cell 2</td>
<td>Cell 3</td>
</tr>
<tr>
<td>Cell 4</td>
<td>Cell 5</td>
<td>Cell 6</td>
</tr>
</table>
</body>
</html>
after dom operation i need the following:
<html>
<body>
<table>
<tr>
<td>Cell 1</td>
</tr>
<tr>
<td>Cell 2</td>
</tr>
<tr>
<td>Cell 3</td>
</tr>
<tr>
<td>Cell 4</td>
</tr>
<tr>
<td>Cell 5</td>
</tr>
<tr>
<td>Cell 6</td>
</tr>
</table>
</body>
</html>
$rows = $xpath->query('xpath to table/tr');
foreach ($rows as $row){
$cols = $xpath->query('xpath to table/tr/*');
$row->parentNode->removeChild($row);
foreach ($cols as $col){
$newNode = $this->createElement('tr');
$newNode->appendChild($col);
$node->appendChild($newNode);
}
}
echo $dom->saveHTML();
its working fine, but its adding empty rows:
<table>
<tr></tr>
<tr></tr>
<tr>
<td>Cell 1</td>
</tr>
<tr>
<td>Cell 2</td>
</tr>
<table>
Any idea whats am i doing wrong??
2 answers
solution1
0 2013-03-06 12:48:20
You can parse HTML and XML with DOM, this is how you could read a table:
$dom = new DOMDocument;
$dom->loadHTML( $table );
$tds = array();
foreach( $dom->getElementsByTagName( 'td' ) as $td ) {
$tds[] = $td->nodeValue;
}
To print the structure flattened:
foreach($tds as $td){
print '<td>'.$td.'</td>';
}
solution2
0 2013-03-15 17:48:18
You can move each <td> element into a new <tr> child of it's current ancestor <table> element:
foreach($xpath->query('//td') as $td)
$xpath->query('ancestor::table[1]', $td)->item(0)
->appendChild($doc->createElement('tr'))->appendChild($td);
{{;;}}
Afterwards you can remove all <tr> elements that do not have any <td> children any longer:
foreach($xpath->query('//tr[0 = count(td)]') as $tr)
$tr->parentNode->removeChild($tr);
{{;;}}
Your document has now been transformed:
<table>
<tr><td>Cell 1</td></tr>
<tr><td>Cell 2</td></tr>
<tr><td>Cell 3</td></tr>
<tr><td>Cell 4</td></tr>
<tr><td>Cell 5</td></tr>
<tr><td>Cell 6</td></tr>
</table>
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