How to use XPath to find the contents of a container with a class?

Question

PHP

Good afternoon!
It is necessary to find all containers with the `auto-formatting` class in the body of the body tag and process them.
I'm looking like this:

preg_match( '/\<div class\=\"auto-formatting\"\>([\s\S]*?)\<\/div\>\<\!-- \.auto-formatting --\>/miu', func_get_arg(0), $matches );

But this approach is not at all flexible.
How can this be done with XPath?
So far I've only thought of this:

$i = 0;
$html = DOMDocument::loadHTML( $buffer );
$xpath = new DOMXPath($htmll);

    foreach( $xpath->query('//div[contains(@class,"auto-formatting")]') as $item ) {
        // обработка
        $i++;
    }

Does not work. Tell me, please, how to write correctly?

Answer 1

The expression is correct. There is a typo in the code. The DOM is loaded into the $html variable, and the XPath is applied to the document from the $html l variable . In general, if $htmll was not initialized, then it should have failed with an error. In general, it is worth turning on the display of errors.