Using Xpath to return multiple elements value - php

Question

I have a result from a curl request from a page like this:
$result =
<div class="c-wrapper">
<a href="link-to-a-page.php">
<div class="c-content-img">
<img src="...">
</div>
<div class="c-link-data">
<div class="c-link-data-title">
<h4>TITLE</h4>
</div>
</div>
</a>
<div>
<div class="c-wrapper">
<div class="c-content-img">
<img src="...">
</div>
<div class="c-link-data">
<div class="c-link-data-title">
<h4>TITLE 2</h4>
</div>
</div>
<div>
Now I have to count how many c-wrapper is present:
I use correctly this:
$doc = new DOMDocument();
#$doc->loadHTML($result);
$xpath = new DOMXPath($doc);
$divs = $xpath->query("//div[contains(#class, 'c-wrapper')]");
echo $divs-length; //<--- printed: 2
Then I have to print all titles:
I use correctly this:
$titles = $xpath->query("//div[contains(#class, 'c-link-data-title')]/h4");
foreach ($titles as $title) {
echo $title->textContent . "<br>";
}
Now the part I don't know: In the first div is present a link, in the second one no link. I'd like to edit my print of titles like this:
foreach ($titles as $title) {
if ( $link_extracted !="" )
echo "<a href='" . $link_extracted . "'>" . $title->textContent . "</a><br>";
else
echo $title->textContent . "<br>";
}
How can I edit $titles = $xpath->query("//div[contains(#class, 'c-link-data-title')]/h4"); to achieve this?

Answer 1

Rather than doing this in separate stages, the code finds the c-wrapper elements and then further uses XPath to find the various parts you want inside that particular element, so in
$link_extracted = $xpath->evaluate("a/#href", $div)[0];
it is looking for an <a> element relative to the $div element. Using [0] as you want only the first one.
$doc = new DOMDocument();
#$doc->loadHTML($result);
$xpath = new DOMXPath($doc);
$divs = $xpath->query("//div[contains(#class, 'c-wrapper')]");
echo $divs->length;
foreach ( $divs as $div ) {
$link_extracted = $xpath->evaluate("a/#href", $div)[0];
$title = $xpath->evaluate("descendant::div[contains(#class, 'c-link-data-title')]/h4/text()"
, $div)[0];
if ( !empty($link_extracted->nodeValue) ) {
echo "<a href='" . $link_extracted->nodeValue . "'>" . $title->textContent . "</a><br>";
}
else {
echo $title->textContent . "<br>";
}
}
which for your test HTML gives...
2<a href='link-to-a-page.php'>TITLE</a><br>TITLE 2<br>