How to Exclude Class in Parent Xpath Class? PHP - php

Question

Driving me up the wall, it's like this, the DOM
<div class="product-intro"><p class="product-desc"><span class="product-model">234</span>Product Description</p></div>
It's not anything like this... invalid argument, no nodes found:
$node3 = $xp->query("//p[#class='product-desc and not(#class='product-model']");
$node3 = $xp->query("//p[#class='product-desc'][not([#class='product-model'])]");
This alone:
$node3 = $xp->query("//p[#class='product-desc']");
Works perfectly well and fine-- as far as getting a result.
The output is
234Product Description
I know I could just do a string replace, but not ideally.. How do I get it to exclude the product-model class in my query?
Entire script:
$x = '<div class="product-item productContainer" data-itemno="234">
<div class="product-and-intro">
<div class="product">
<a href="/en/234.html" title="Product Description">
<img src="/ProductImages/106/234.jpg" alt="Product Description" class="itemImage" />
<div class="product-intro">
<p class="product-desc"><span class="product-model">234</span>Product Description</p>
<p class="price"><span class="us">US$</span>6.50 <span class="oldprice"><s>$ 13.00</s></span></p>
</div>
</a>
</div>
</div>
</div>';
$dom = new DOMDocument();
libxml_use_internal_errors(true);
$dom->loadHTML($x);
$xp = new DOMXPath($dom);
$node1 = $xp->query("//div[#class='product']//img");
$node2 = $xp->query("//span[#class='product-model']");
$node3 = $xp->query("//p[#class='product-desc']");
// $node3 = $xp->query("//p[#class='product-desc']/text()[2]");
// $node3 = $xp->query("//p[#class='product-desc' and not(span/#class='product-model')]");
$node4 = $xp->query("//p[#class='price']");
foreach ($node1 as $n) {
echo $n->getAttribute('src');
echo '<br>';
}
foreach ($node2 as $n2) {
echo $n2->nodeValue;
echo '<br>';
}
foreach ($node3 as $n3) {
echo $n3->nodeValue;
echo '<br>';
}
foreach ($node4 as $n4) {
echo $n4->nodeValue;
echo '<br>';
}

Answer 1

If you want to select all p elements with a #class attribute value of product-desc and then filter out those who have a span sub-element with the #class attribute value product-model you can use this XPath expression:
//p[#class='product-desc' and not(span/#class='product-model')]
Or, in a whole
$node3 = $xp->query("//p[#class='product-desc' and not(span/#class='product-model')]");