PHP+Ajax. How to correctly get the values ​​of variables from PHP?

Question

PHP

Good afternoon. Can you please tell me how to get the values ​​of variables from PHP?
Ie there is a script.php in it 3 variables $url1 $url2 and $url3.
You need an AJAX request to get them. How to do it right? Thank you!

Answer 1

Create an array of variables using compact and output to json using json_encode