CaptchaBundle/README.md

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Gregwar's CaptchaBundle
=====================
The `GregwarCaptchaBundle` adds support for a "captcha" form type for the
Symfony2 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.
The first method is the standard Symfony2 method.
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***Using the vendors script***
Add the following lines to your `deps` file:
```
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[GregwarCaptchaBundle]
git=git://github.com/Gregwar/CaptchaBundle.git
target=/bundles/Gregwar/CaptchaBundle
```
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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
Now you will need to add the `Gregwar` namespace to your autoloader:
``` php
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<?php
// app/autoload.php
$loader->registerNamspaces(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
// ...
$builder->add('captcha', 'captcha'); // That's all !
// ...
```
Note that the generated image will be embeded in the HTML document, to avoid dealing
with route and subrequests.
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Options
=======
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You can define the following type option :
* **width**: the width of the captcha image (default=120)
* **height**: the height of the captcha image (default=40)
* **length**: the length of the captcha (number of chars, default 5)
* **charset**: the charset used for code generation (default=abcdefhjkmnprstuvwxyz23456789)
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* **font**: the font to use (default=Generator/Font/captcha.ttf)
* **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)
* **image_folder**: name of folder for captcha images relative to public web folder in case **as_file** ist 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)
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Example :
```php
<?php
// ...
$builder->add('captcha', 'captcha', array(
'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
Form theming
============
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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.
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) }}
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{% spaceless %}
{% 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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