how to get value from url after /

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I have url like this http://www.example.com/user/1 and i want get user id which is 1. When i try it with my code i get right id but my css style is not applied to the page. But when i try to get id from url http://www.example.com?profile.php?user=1 i can see style of my page. The code what i use in first example is:

$request = parse_url($_SERVER['REQUEST_URI']);
     $path = $request["path"];
     $result = rtrim(str_replace(basename($_SERVER['SCRIPT_NAME']), '', $path), '/');
     $parts = $query = explode("/", $result);
     $user = $parts[2];
     $sql = "SELECT firstName, lastName FROM users WHERE id = ".$user." LIMIT 1";
     $res = $con->query($sql);
     $row = $res->fetch_assoc();

and where i try to get id for secuond example i use only $_GET method. Please help.

asked 12 secs ago

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how to get value from url after /