BotDetect Symfony 4 CAPTCHA Integration Quickstart

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1. Installing the BotDetect Symfony CaptchaBundle

Note: If you do not have Composer yet, you can install it by following the instructions on https://getcomposer.org

If you have Git installed on your development machine, you should use the following installation procedure:

Step 1: Download CaptchaBundle using composer

Run the following command in your application's root directory:

Step 2: Import CaptchaBundle routing file (config/routes.yml):

captcha_routing:
  resource: "@CaptchaBundle/Resources/config/routing.yml"

2. Show a Captcha Challenge on the Form

a) If Symfony is a backend for your js-based frontend, perhaps you should start with a guide that describes integration from js-framework point of view: jQuery, Angular, AngularJS, or React.

b) If you are using Symfony forms, here is how to configure Captcha options, and display Captcha in your Symfony form:

Captcha configuration options (config/captcha.php):

<?php if (!class_exists('CaptchaConfiguration')) { return; }

// BotDetect PHP Captcha configuration options

return [
  // Captcha configuration for example page
  'ExampleCaptcha' => [
    'UserInputID' => 'captchaCode',
    'ImageWidth' => 250,
    'ImageHeight' => 50,
  ],

];

Adding the CaptchaType in your form:

use Captcha\Bundle\CaptchaBundle\Form\Type\CaptchaType;

$builder->add('captchaCode', CaptchaType::class, array(
  'captchaConfig' => 'ExampleCaptcha'
));

3. Check User Input During Form Submission

Using the ValidCaptcha constraint to validate captcha code when a form is submitted:

namespace App\Entity;

use Captcha\Bundle\CaptchaBundle\Validator\Constraints as CaptchaAssert;

class Example
{
  /**
   * @CaptchaAssert\ValidCaptcha(
   *      message = "CAPTCHA validation failed, try again."
   * )
   */
  protected $captchaCode;

  public function getCaptchaCode()
  {
    return $this->captchaCode;
  }

  public function setCaptchaCode($captchaCode)
  {
    $this->captchaCode = $captchaCode;
  }
}

In-Depth Symfony CAPTCHA Instructions and Explanations

Detailed Symfony Captcha instructions and explanations can be found in the Symfony 4 Captcha integration how to guide.

Other BotDetect PHP CAPTCHA Quickstarts

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CakePHP 2 CAPTCHA Laravel 5.0 CAPTCHA CodeIgniter 3.0 CAPTCHA
CodeIgniter 2.2 CAPTCHA Laravel 4.2 CAPTCHA  

BotDetect Symfony CAPTCHA System Requirements

Symfony

Supported Symfony Versions:

  • Symfony 4.0.0+