laravel5.2 use CAPTCHA to generate verification code (session giant pit)

recently, a friend asked me to help get the Laravel verification code landing, so a little research. (I almost forgot how to use the Laravel)

first of all, install laravel do not have to repeat, my version is 5.2.45 (note: laravel5.2.6 above the version of middleware can automatically load), which is very important.

after the installation is complete, you need to use composer to load your captcha by adding "Gregwar/captcha" to the Require array in your composer.json. Then, in your project root directory, use CMD to run composer update this line of code. This way, even if the library is installed or middleware. Then you can be presumptuous to write your code.

php: (The specific route of what the next do not do too much to repeat, write only key code)

The Public Function captcha ($tmp)
{
    //generates the builder object for the Captcha picture, configures the corresponding property
    $builder = new Captchabuilder;
    You can set the picture wide and font
    $builder->build ($width =, $height =, $font = null);
    Gets the contents of the authentication code
    $phrase = $builder->getphrase ();

    The content is deposited
    in session session::flash (' Milkcaptcha ', $phrase);
    Generate
    a picture header ("Cache-control:no-cache, must-revalidate");
    Header (' Content-type:image/jpeg ');
    $builder->output ();
}

call to Blade Template:

  If you think it's done, you're really too yang too. You'll find out what's wrong when you verify it. is
not very sour. Because in laravel5.2, all the sessions are not across the controller, methods, if the cross, the session will be reborn
, the default sessions of the delivery needs to pass through the middleware. Don't worry, the next way is to solve the problem. At present, I know there are two solutions, one
is to build a middleware, and then all the sessions are stored in it, but a little trouble, next I introduce a simple
method, in your laravel\app\http\kernel.php Add the following code to the $middleware in the file:

\illuminate\foundation\http\middleware\checkformaintenancemode::class,
\illuminate\cookie\middleware\ Encryptcookies::class,
\illuminate\cookie\middleware\addqueuedcookiestoresponse::class,
\Illuminate\ Session\middleware\startsession::class,
\illuminate\view\middleware\shareerrorsfromsession::class,

Then you can rest assured that the use of the session. This is the way to verify the code in the next

Public Function Login_data ()
{
    $userInput = \request::get (' captcha ');

    if (Session::get (' milkcaptcha ') = = $userInput) {//
        user input Verification code correct, verify your password username      echo 1;
    } else {
        // User input authentication code error
        echo 2
    }
}

Finally have to spit out the official documents of Laravel, such as this kind of pit is not in advance, it is estimated that developers are worried about the development of it.
End ...
I wish you all a smooth work, happy every day, everyone has their own small objects, long and very kind of ...