Does DiDOM support scraping of iframe content?

No, DiDOM does not support scraping of iframe content directly. DiDOM is a PHP library that provides a simple and consistent way to parse and manipulate HTML/XML documents. It uses libxml via the DOM extension and provides a convenient wrapper around the native PHP DOM functions.

When dealing with iframes, the content is often loaded from a different URL or even a different domain. Since the iframe content is not part of the initial HTML document received by the server, DiDOM will not have access to this content. To scrape content from an iframe, you would typically need to:

1. Parse the main document to find the iframe element.
2. Extract the src attribute to get the URL of the content loaded by the iframe.
3. Make a separate HTTP request to the URL found in the src attribute.
4. Parse the response of this request as a new document.

Here is a conceptual example in PHP using DiDOM to extract the iframe src and then using cURL to fetch the content:

use DiDom\Document;

// Load the main document
$mainDocument = new Document('http://example.com/page-with-iframe', true);

// Find the iframe element
$iframe = $mainDocument->find('iframe');

// Check if we have an iframe element
if ($iframe) {
    // Extract the src attribute of the iframe
    $iframeSrc = $iframe->getAttribute('src');

    // Make a cURL request to the iframe URL
    $curl = curl_init($iframeSrc);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    $iframeContent = curl_exec($curl);
    curl_close($curl);

    // Parse the iframe content as a new document
    $iframeDocument = new Document($iframeContent);

    // Now you can use DiDOM to parse the iframe content
    // ...
}

Please note that this code is a high-level example and does not include error handling or check for relative URLs. Also, there are some potential issues and considerations you should keep in mind:

1. Cross-domain restrictions: If the iframe content is on a different domain, you may run into cross-origin policy restrictions, which are designed to prevent potentially malicious behavior.

2. Dynamic content: If the iframe content is dynamically loaded with JavaScript, a server-side request like the one above will not execute the scripts. You might need a browser automation tool like Selenium or Puppeteer that can render the JavaScript and then access the iframe content.

3. Authentication: If the iframe content requires authentication, you will need to handle the authentication process within your scraping script.

4. Legal and ethical considerations: Always ensure that you are allowed to scrape the content of the website you are targeting, as scraping can be against the terms of service of some websites and could lead to legal issues.