<?php
$urls = ['imports', 'var', 'js'];
$url_pattern = '/example.com\/(' . implode('|', $urls) . ')\/.*/';

$remove_urls = [
	"example.com/imports/product.html",
	"example.com/imports/product1.html",
	"example.com/var/cache/5t46fdgdyg7644gfgfdgr",
	"example.com/css/style.css",
	"example.com/js/scripts.js"
];

$removed = preg_grep($url_pattern, $remove_urls);
print_r($removed);