$app->redirect("/contact"); or $app->redirect("contact");

Yet another answer for the local MAMP folks. I define a base URL for my working folder in htdocs first: for me it's

define("BASE_URL","/php_notes/web_dev_slim");

then when setting up the route in the else block of this lesson one can use:

$app->redirect(BASE_URL . '/contact');
```.
The other answers certainly get you up and running with less code however, the approach of setting a base URL is something to keep in mind when going between development and production environments.

With the 'redirect' method, I'm guessing you can redirect to a defined route.

Here:

<?php

    $app->get('/contact', function () use($app){
        $app->render("contact.twig");
    })->name("contact");

you've defined a route at /contact and called that route 'contact'. If you redirect to '/contact,' you're going to go to

http://localhost:8888/contact

if you redirect to 'contact', the app will know to keep /newphp/ in the url.

http://localhost:8888/newphp/contact

I imagine this wouldn't be a problem if you weren't keeping the project in it's own directory.

Hope this helps :)

I've had a poke around the documentation on redirect

it turns out that $app->redirect() takes the url as the argument.

E.g. this should work:

<?php
    $app->get('/newphp/contact', function () use($app){
        $app->render("contact.twig");
    })->name("contact");

$app->redirect("/newphp/contact");

// or

    $app->get('/contact', function () use($app){
        $app->render("contact.twig");
    })->name("contact");

$app->redirect("contact");

and this will NOT work

<?php

    $app->get('/newphp/contact', function () use($app){
        $app->render("contact.twig");
    })->name("contact");

$app->redirect("contact");

// or

$app->redirect("/contact");

When you specify the root or the url ('/contact') then it breaks your local setup because you're redirecting to '/contact' instead of '/newphp/contact' right?

So you can either stay as you were:

<?php

$app->redirect("contact");

and slim will add 'contact' to '/newphp/' OR If you want to use the named route you should go with:

<?php

$app->response->redirect($app->urlFor('contact'));

The reason why you're different from the documentation is because in your local setup, your project is not sitting in the root. You therefore cannot refer to the root when redirecting or you'll go to the wrong place!

Hope that helps.

Chiming in here to say I have discovered precisely the same problem as the OP. I haven't figured out the cause of the behavior.

However, here is some added insight (or facemelting-confusion as the case may be...).

Throughout this course, I simultaneously built the project and wrote the code in both the Treehouse workspace AND in my own local MAMP setup.

When I got to this part of the course, which adds the 'redirect' code to the project, it worked fine in the workspace but broke to a '404' in MAMP.

I discovered the same fix as OP, but only in MAMP. The following gets the code to behave properly in MAMP:

    $app->redirect('contact');

... while the following works in the Treehouse workspace:

    $app->redirect('/contact');

Just to verify, I took the time to completely copy all of the working files (index.php, main.twig, contact.twig, about.twig) into my MAMP setup, in case a typo somewhere was the culprit for the discrepancy. But the results were the same. The slash works in the workspace and breaks locally.

Note, however, that the slash is (behaving as if it's) optional in the Treehouse workspace. Delete the slash in the redirect command, and the Treehouse workspace version of the page still behaves normally.

It's fine and all to have the working solution, but as with the OP, I think, I'd really like to know WHY this is happening.

(... and thanks to Tom for all the effort he's put in so far... :) )

If I write the root relative url it doesn't work:

<?php
    $app->get('/newphp/contact', function () use($app){
        $app->render("contact.twig");
    })->name("contact");
?>

$app->redirect("contact");

¡¡¡Muchísimas gracias Tom!!! Sin tu ayuda no hubiese podido llegar a esta conclusión. Thank you so much Tom!!! I couldn't have done this without your help. You are a great Treehouse Moderator.