I try to get content list of CPU compatible with motherboard but the function file_get_contents() returns the page content without CPU list
url='https://www.asrock.com/mb/Intel/Z390%20Phantom%20Gaming%206/index.pl.asp#CPU';
$html = file_get_contents($url);
The CPU data is not part of this page. When a user clicks the "CPU" link on the page javascript is executed to get and display this json file: https://www.asrock.com/mb/productGet.asp?cat=CPU&Model=Z390%20Phantom%20Gaming%206
What you need to do is get this file either server side (PHP) or Client side javascript convert it into a form suitable for display ("decode" the json).