PHP with DOMXPath - How to select and count from this html tree - php

Question

I need to count how many of these items are open, and there are four types of them: Easy, Medium, Difficult and Not-Wanted. All of these types are values inside the div's. I need to exclude the 'Not-Wanted' types from the count. Notice the 'Open' and 'Close' values have different number of spaces around them. This is the html structure:
<table>
<tbody>
<tr>
<td>
<div>Difficult</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Closed </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Medium</div>
</td>
<td>Name</td>
<td>Open </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Medium</div>
</td>
<td>Name</td>
<td> Closed</td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td>Closed </td>
</tr>
<tr>
<td>
<div>Not-wanted</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Difficult</div>
</td>
<td>Name</td>
<td>Open</td>
</tr>
............
This is one of my attempts to solve the problem. It is obviously wrong, but I don't know how to get it right.
$doc = new DOMDocument();
$doc->loadHtmlFile('http://www.nameofsite.com');
$doc->preserveWhiteSpace = false;
$xpath = new DOMXPath($doc);
$elements = $xpath->query("/html/body/div[1]/div/section/div/section/article/div/div[1]/div/div/div[2]/div[1]/div[2]/div/section/div/div/table/tbody/tr");
$count = 0;
foreach ($elements as $element) {
if ($element->childNodes->nodeValue != 'Not-wanted') {
if ($element->childNodes->nodeValue === 'open') {
$count++;
}
}
}
echo $count;
I have a very rudimental knowledge of DOMXPath, so it is too complex for me, since I'm only able to create simple queries.
Can anybody help?
Thanks in advance.

Answer 1

Based on the data in your example, I think you can adjust the xpath expression to this to get all the <tr>'s that match your conditions:
//table/tbody/tr[normalize-space(td[3]/text()) = 'Open' and
td[1]/div/text() != 'Not-wanted']
$elements is then of type DOMNodeList and you can then get the length property to get the number of nodes in the list.
For example:
$source = <<<SOURCE
<table>
<tbody>
<tr>
<td>
<div>Difficult</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Closed </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Medium</div>
</td>
<td>Name</td>
<td>Open </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Medium</div>
</td>
<td>Name</td>
<td> Closed</td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td>Closed </td>
</tr>
<tr>
<td>
<div>Not-wanted</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Difficult</div>
</td>
<td>Name</td>
<td>Open</td>
</tr>
</tbody>
</table>
SOURCE;
$doc = new DOMDocument();
$doc->loadHTML($source);
$doc->preserveWhiteSpace = false;
$xpath = new DOMXPath($doc);
$elements = $xpath->query("//table/tbody/tr[normalize-space(td[3]/text()) = 'Open' and td[1]/div/text() != 'Not-wanted']");
echo $elements->length;
Which will result in:
5
Demo