PHP ganon dom parser get next element when match is found - php

Question

I am parsing and html dom string from ganon dom parser and want to get the next element plain text when a match is found on previous element e.g my html is like
<tr class="last even">
<th class="label">SKU</th>
<td class="data last">some sku here i want to get </td>
</tr>
I have used the following code for now
$html = str_get_dom('html string here');
foreach ($html('th.label') as $elem){
if($elem->getPlainText()=='SKU'){ //this is right
echo $elem->getSibling(1)->getPlainText(); // this is not working
}
}
If the th with class lable and innerhtml SKU is found then get the innerhtml from next sibling that is SKU value
Please help to sort this out.

Answer 1

It's probably a bug in "ganon" of the html - if you take your example of html:
$html = '<table>
<tr class="last even">
<th class="label">SKU</th>
<td class="data last">some sku here i want to get </td>
</tr>
</table>';
$html = str_get_dom($html);
for some reason because of the new line in the html "ganon" thinks that the next element is a text element and only then there is the desire td - so you have to do this:
foreach ($html('th.label') as $elem){
if($elem->getPlainText()=='SKU'){
//elem -> text node -> td node
echo($elem->getSibling(1)->getSibling(1)->getPlainText());
}
}
If you organize your html like this (without new line):
$html = '<table>
<tr class="last even">
<th class="label">SKU</th><td class="data last">some sku here i want to get </td>
</tr>
</table>';
Then your original code will work $elem->getSibling(1)->getPlainText()
Maybe consider using the php simple html dom class - it's much more intuitive, using full oop methods, jquery dom parser like and don't uses this awful var-function method :):
require('simple_html_dom.php');
$html = '<table>
<tr class="last even">
<th class="label">SKU</th>
<td class="data last">some sku here i want to get </td>
</tr>
</table>';
$dom = str_get_html($html);
foreach($dom->find('th.label') as $el){
if($el->plaintext == 'SKU'){
echo($el->next_sibling()->plaintext);
}
}