To scrape the mentioned webpage and handle dynamic URLs effectively, here are some tips:

Steps to Identify Dynamic URLs

1. Recheck Headers and Payload: The request might require additional headers, cookies, or query parameters, such as authentication tokens or session data. Review the Headers and Payload sections in the Network tab for missing details.
2. Inspect JavaScript Code: Look for API calls or JavaScript functions in the source code that construct the URL or manage authentication.
3. Test with Postman or CURL: Use tools like Postman to replicate the request and ensure you've captured all required parameters.
4. Check Rate Limiting: Some websites restrict access by IP or frequency of requests. Implement proper delays or proxies.

Debugging the Error The HTTP_500 error suggests the request might be missing critical details. Compare working requests in the browser with your manual attempts to identify discrepancies.

Tutorials on Web Scraping Dynamic Pages

• Medium articles or YouTube: Search for "Web Scraping JavaScript-rendered pages" or "Handling dynamic URLs."
• Tools: Use libraries like Puppeteer (Node.js) or Playwright for JavaScript-heavy pages. For PHP, consider using Goutte for simpler pages.
• Advanced Frameworks: For dynamic content, tools like Selenium or BeautifulSoup (Python) combined with browser emulators may be better.

If you're restricted to PHP and Simple_HTML_DOM, try combining it with CURL to mimic API requests effectively.