175 lines
6.9 KiB
Markdown
175 lines
6.9 KiB
Markdown
Gregwar's CaptchaBundle
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=====================
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[](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=YUXRLWHQSWS6L)
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The `GregwarCaptchaBundle` adds support for a captcha form type for the
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Symfony form component.
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It uses [gregwar/captcha](https://github.com/Gregwar/Captcha) as captcha generator, which is a separate standalone library that can be used for none-symfony projects.
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Compatibility with Symfony
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==========================
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| CaptchaBundle | Symfony | PHP |
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|:---------------:|:---------:|:--------:|
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| 2.1.* | 4.* - 5.* | >= 7.1 |
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| 2.0.* | 2.8 - 3.* | >= 5.3.9 |
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| 1.* | 2.1 - 2.7 | >= 5.3.0 |
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Installation
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============
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### Step 1: Download the GregwarCaptchaBundle
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Use composer require to download and install the package.
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At the end of the installation, the bundle is automatically registered thanks to the Symfony recipe.
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``` bash
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composer require gregwar/captcha-bundle
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```
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If you don't use flex, register it manually:
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```php
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<?php
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// config/bundles.php
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return [
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// ...
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Gregwar\CaptchaBundle\GregwarCaptchaBundle::class => ['all' => true]
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];
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```
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Configuration
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=============
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If you need to customize the global bundle configuration, you can create a `/config/packages/gregwar_captcha.yaml` file with your configuration:
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``` yaml
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gregwar_captcha:
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width: 160
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height: 50
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```
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Usage
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=====
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You can use the "captcha" type in your forms this way:
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``` php
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<?php
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use Gregwar\CaptchaBundle\Type\CaptchaType;
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// ...
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$builder->add('captcha', CaptchaType::class); // That's all !
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// ...
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```
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Note that the generated image will, by default, be embedded in the HTML document
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to avoid dealing with route and subrequests.
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Options
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=======
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You can define the following configuration options globally:
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* **image_folder**: name of folder for captcha images relative to public web folder in case **as_file** is set to true (default="captcha")
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* **web_path**: absolute path to public web folder (default='%kernel.project_dir%/public')
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* **gc_freq**: frequency of garbage collection in fractions of 1 (default=100)
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* **expiration**: maximum lifetime of captcha image files in minutes (default=60)
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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)
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* **height**: the height of the captcha image (default=40)
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* **disabled**: disable globally the CAPTCHAs (can be useful in dev environment), it will
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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)
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* **charset**: the charset used for code generation (default=abcdefhjkmnprstuvwxyz23456789)
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* **font**: the font to use (default is random among some pre-provided fonts), this should be an absolute path
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* **keep_value**: the value will be the same until the form is posted, even if the page is refreshed (default=true)
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* **as_file**: if set to true an image file will be created instead of embedding to please IE6/7 (default=false)
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* **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)
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* **invalid_message**: error message displayed when an non-matching code is submitted (default="Bad code value", see the translation section for more information)
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* **bypass_code**: code that will always validate the captcha (default=null)
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* **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)
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* **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)
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* **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
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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
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* **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 :
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``` php
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<?php
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use Gregwar\CaptchaBundle\Type\CaptchaType;
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// ...
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$builder->add('captcha', CaptchaType::class, array(
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'width' => 200,
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'height' => 50,
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'length' => 6,
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));
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```
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You can also set these options for your whole application using the `gregwar_captcha`
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configuration entry in your `config.yml` file:
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``` yaml
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gregwar_captcha:
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width: 200
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height: 50
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length: 6
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```
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Translation
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===========
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The messages are using the translator, you can either change the `invalid_message` option or translate it. Any contribution about the language is welcome !
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As URL
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============
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To use a URL to generate a captcha image, you must add the bundle's routing configuration to your app/routing.yml file:
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``` yaml
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gregwar_captcha_routing:
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resource: "@GregwarCaptchaBundle/Resources/config/routing/routing.yml"
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```
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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:
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``` yaml
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gregwar_captcha_routing:
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resource: "@GregwarCaptchaBundle/Resources/config/routing/routing.yml"
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prefix: /_gcb
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```
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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
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============
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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.
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The default rendering is:
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``` twig
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{% block captcha_widget %}
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{% spaceless %}
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<img src="{{ captcha_code }}" title="captcha" width="{{ captcha_width }}" height="{{ captcha_height }}" />
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{{ form_widget(form) }}
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{% endspaceless %}
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{% endblock %}
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```
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Image creation
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==============
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If you choose to use image files instead of embedding the widget will execute a garbage collection
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randomly and delete images that exceed the configured lifetime.
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License
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=======
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This bundle is under the MIT license. See the complete license in the bundle:
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LICENSE
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