With what tool to upload content from third-party resources?

Question

PHP

Interested in what method to parse (?) or unload content from other resources, even from specific pages.
The task looks very simple:
1. Enter a line into the search for the html/php page on the flqx1.name domain.
2. Return the content of the search results displayed on this page - on the domain flqx2.name
3. Save the content of the search results in the database of the domain flqx2.name
(Domain names are fictitious).

Answer 1

If for an abstract site, then only with the help of a headless browser, such as Selenium, phantom.js, because JavaScript must be loaded and executed, CSS must be loaded, etc.