CaptchaBundle/README.md

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Gregwar's CaptchaBundle
=====================
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The `GregwarCaptchaBundle` adds support for a captcha form type for the
Symfony form component.
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Installation
============
### Step 1: Download the GregwarCaptchaBundle
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Ultimately, the GregwarCaptchaBundle files should be downloaded to the
'vendor/bundles/Gregwar/CaptchaBundle' directory.
You can accomplish this several ways, depending on your personal preference.
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The first method is the standard Symfony method.
***Using Composer***
Use composer require to download and install the package.
``` bash
composer require gregwar/captcha-bundle
```
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***Using the vendors script***
Add the following lines to your `deps` file:
```
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[GregwarCaptchaBundle]
git=http://github.com/Gregwar/CaptchaBundle.git
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target=/bundles/Gregwar/CaptchaBundle
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version=origin/2.0 <- add this if you are using Symfony 2.0
```
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Now, run the vendors script to download the bundle:
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``` bash
$ php bin/vendors install
```
***Using submodules***
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If you prefer instead to use git submodules, then run the following:
``` bash
$ git submodule add git://github.com/Gregwar/CaptchaBundle.git vendor/bundles/Gregwar/CaptchaBundle
$ git submodule update --init
```
### Step 2: Configure the Autoloader
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If you use composer, you can skip this step.
Now you will need to add the `Gregwar` namespace to your autoloader:
``` php
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<?php
// app/autoload.php
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$loader->registerNamespaces(array(
// ...
'Gregwar' => __DIR__.'/../vendor/bundles',
));
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```
### Step 3: Enable the bundle
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Finally, enable the bundle in the kernel:
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```php
<?php
// app/appKernel.php
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public function registerBundles()
{
$bundles = array(
// ...
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new Gregwar\CaptchaBundle\GregwarCaptchaBundle(),
);
}
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```
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Configuration
=============
Add the following configuration to your `app/config/config.yml`:
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gregwar_captcha: ~
Usage
=====
You can use the "captcha" type in your forms this way:
```php
<?php
use Gregwar\CaptchaBundle\Type\CaptchaType;
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// ...
$builder->add('captcha', CaptchaType::class); // That's all !
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// ...
```
Note that the generated image will, by default, be embedded in the HTML document
to avoid dealing with route and subrequests.
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Options
=======
You can define the following configuration options globally:
* **image_folder**: name of folder for captcha images relative to public web folder in case **as_file** is set to true (default="captcha")
* **web_path**: absolute path to public web folder (default="%kernel.root_dir%/../web")
* **gc_freq**: frequency of garbage collection in fractions of 1 (default=100)
* **expiration**: maximum lifetime of captcha image files in minutes (default=60)
You can define the following configuration options globally or on the CaptchaType itself:
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* **width**: the width of the captcha image (default=120)
* **height**: the height of the captcha image (default=40)
* **disabled**: disable globally the CAPTCHAs (can be useful in dev environment), it will
still appear but won't be editable and won't be checked
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* **length**: the length of the captcha (number of chars, default 5)
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* **quality**: jpeg quality of captchas (default=30)
* **charset**: the charset used for code generation (default=abcdefhjkmnprstuvwxyz23456789)
* **font**: the font to use (default is random among some pre-provided fonts), this should be an absolute path
* **keep_value**: the value will be the same until the form is posted, even if the page is refreshed (default=true)
* **as_file**: if set to true an image file will be created instead of embedding to please IE6/7 (default=false)
* **as_url**: if set to true, a URL will be used in the image tag and will handle captcha generation. This can be used in a multiple-server environment and support IE6/7 (default=false)
* **invalid_message**: error message displayed when an non-matching code is submitted (default="Bad code value", see the translation section for more information)
* **bypass_code**: code that will always validate the captcha (default=null)
* **whitelist_key**: the session key to use for keep the session keys that can be used for captcha storage, when using as_url (default=captcha_whitelist_key)
* **reload**: adds a link to reload the code
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* **humanity**: number of extra forms that the user can submit after a correct validation, if set to a value different of 0, only 1 over (1+humanity) forms will contain a CAPTCHA (default=0, i.e each form will contain the CAPTCHA)
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* **distortion**: enable or disable the distortion on the image (default=true, enabled)
* **max_front_lines**, **max_behind_lines**: the maximum number of lines to draw on top/behind the image. `0` will draw no lines; `null` will use the default algorithm (the
number of lines depends on the size of the image). (default=null)
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* **background_color**: sets the background color, if you want to force it, this should be an array of r,g &b, for instance [255, 255, 255] will force the background to be white
* **background_images**: Sets custom user defined images as the captcha background (1 image is selected randomly). It is recommended to turn off all the effects on the image (ignore_all_effects). The full paths to the images must be passed.
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* **interpolation**: enable or disable the interpolation on the captcha
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* **ignore_all_effects**: Recommended to use when setting background images, will disable all image effects.
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Example :
```php
<?php
use Gregwar\CaptchaBundle\Type\CaptchaType;
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// ...
$builder->add('captcha', CaptchaType::class, array(
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'width' => 200,
'height' => 50,
'length' => 6,
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));
```
You can also set these options for your whole application using the `gregwar_captcha`
configuration entry in your `config.yml` file:
gregwar_captcha:
width: 200
height: 50
length: 6
Translation
===========
The messages are using the translator, you can either change the `invalid_message` option or translate it. Any contribution about the language is welcome !
As URL
============
To use a URL to generate a captcha image, you must add the bundle's routing configuration to your app/routing.yml file:
gregwar_captcha_routing:
resource: "@GregwarCaptchaBundle/Resources/config/routing/routing.yml"
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This will use the bundle's route of "/generate-captcha/{key}" to handle the generation. If this route conflicts with an application route, you can prefix the bundle's routes when you import:
gregwar_captcha_routing:
resource: "@GregwarCaptchaBundle/Resources/config/routing/routing.yml"
prefix: /_gcb
Since the session key is transported in the URL, it's also added in another session array, under the `whitelist_key` key, for security reasons
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Form Theming
============
The widget support the standard Symfony theming, see the [documentation](http://symfony.com/doc/current/book/forms.html#form-theming) for details on how to accomplish this.
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The default rendering is:
```html
{% block captcha_widget %}
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{% spaceless %}
<img src="{{ captcha_code }}" title="captcha" width="{{ captcha_width }}" height="{{ captcha_height }}" />
{{ form_widget(form) }}
{% endspaceless %}
{% endblock %}
```
Image creation
==============
If you choose to use image files instead of embedding the widget will execute a garbage collection
randomly and delete images that exceed the configured lifetime.
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License
=======
This bundle is under the MIT license. See the complete license in the bundle:
LICENSE
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