Using Xpath to return multiple elements value

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?

Nigel Ren · Accepted Answer · 2019-11-09 14:22:43Z

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>

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