If is_page() With Regular PHP - blogpost

example1.php

<?php
	$baseurl = 'http://www.example.com'; //set the base url of the site
	$pageYouWant = $baseurl."/the-rest-of-the-url"; //add the rest of the url you want to check against
	$currentPage = $baseurl.$_SERVER['REQUEST_URI'];// this gets the current page url
	if($pageYouWant==$currentPage) {
    	//do something
	}
?>