$current_page_URL = $_SERVER["SERVER_NAME"] . $_SERVER["REQUEST_URI"];
$str = "$current_page_URL";
if($str == "off-shop.com.ua/wp-admin/post-new.php?post_type=slider"){
strcmp()
.$uri = $_SERVER['REQUEST_URI'];
if(strcmp($uri,'/wp-admin/post-new.php?post_type=slide')===0) echo 'Соответствует!';
else echo 'Не соответствует!';