Laravel Session - Public for Controller

Question

I’m making a form that contains a Captcha. The Captcha is generated by a PHP script that mounts an image.

And I put the script in the folder public of Laravel 4.

When the code of Captcha is generated is logged:

session_start();
$_SESSION['numCaptcha'] = $code;

After sending the form data, send to a Controller, that has the function:

public function enviaContato() {
   echo $_SESSION['numCaptcha'];
   die();

   # Verificação de Captcha
   if (empty(Session::get('numCaptcha')) || strcasecmp(Session::get('numCaptcha'), Input::get('numCaptcha')) != 0) {
      Session::flash('error', "Captcha Inválido");
   }
}

This way that I did above is not getting the value of the session. I’ve also done:

Session::get('numCaptcha')

But it didn’t work either.

Ecziste some restriction ?
You can do it another way ?

So, how to make use of the public to the Controller.

Answer 1

First, you should check the configuration of the Laravel. Laravel (like most frameworks), does not use the native PHP session. I can’t remember if there’s any way to set this up.

Thus, the sessions of $_SESSION and Session::get are saved in different mechanisms (PHP saved in its default form, and Laravel saved in a file inside the folder app/storage).

So either your code has to be transformed into "pure php" or "pure Laravel".

You mentioned in the comments that you could not install the desired library. So here’s a captcha "in hand" (an "almost pure" solution) that I used one of our system in Laravel - Might be useful in your case.

Route::get('captcha', function()
{

    $word = [0 => null, 1 => null];

    for ($i = 0; $i < 4; $i++) {
        $word[0] .= chr(mt_rand(97, 122));
        $word[1] .= chr(mt_rand(97, 122));
    }

    $word = implode(' ', $word);


    Session::put('captcha_word', $word);

    $font = public_path('recaptcha/fonts/recaptchaFont.ttf');

    $image = imagecreatetruecolor(172, 50);

    $color = imagecolorallocate($image, 0, 0, 0);
    $white = imagecolorallocate($image, 255, 255, 255);

    imagefilledrectangle($image, 0, 0, 172, 99, $white);
    imagettftext($image, 22, 0, 5, 35, $color, $font, Session::get('capcha_word'));

    $tempCapcha = tempnam(null, 'captcha');

    imagepng($image, $tempCapcha);

    return Response::make(File::get($tempCapcha), 200, ['Content-Type' => 'image/png']);
});

The verification would be as follows:

if (Session::get('captcha_word') == Input::get('algum_input_com_captcha'))
{

}

And in HTML, to display Captcha, you could do it like this:

<img src="{{ URL::to('captcha') }}?{{ Str::random(8) }}" />

Observing: Note that you need to save the source used by Captcha on path specified on the route.

Updating: The passage from the variable $word can be changed to make the code cleaner, using only one line to declare it.

Thus:

$word = trim(chunk_split(Str::random(8), 4, ' '));