Why it is not redirecting - php

Question

<?php
if(isset($_POST['confirm'])){
$name = $db->validation($_POST['name']);
$id = "";
for($i= strlen($name) ; $i>=1 ; $i--){
if($name[$i-1] == 'a'){
break;
}else{
$id = $id.$name[$i-1];
}
}
$userid = strrev($id);
$query = "SELECT * FROM bluekolar_user WHERE token = '$name' AND user_id='$userid'";
$result = $db->select($query);
if($result){
if(mysqli_num_rows($result) ==1 ){
$qu = "UPDATE bluekolar_user SET active = '1' WHERE user_id='$userid'";
$res = $db->update($qu);
if($res){
$url = "profile/index.php?id=".$userid ;
header('location:'.$url) ;
exit();
}else{
$error = "Provide correct confirmation code";
}
}else{
$error = "Provide correct confirmation code";
}
}
}
?>
The code is performing good but it is unable to redirect. I don't know why. I need help.
Please help me so that I can redirect my code command to another page.
Thank you.

Answer 1

You need to ensure the path you are trying to redirect to is correct. The code in your question will try to redirect to a "profile" subdirectory of the location where this script is running. If you want to go to "http://example.com/profile/index.php?id=" you need to change your $url to be "/profile/index.php"