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Package captcha
Short Description Captcha generator with the most flexible settings.
License MIT
Homepage https://github.com/onnov/captcha
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Informations about the package captcha
captcha
Captcha with the most flexible settings. Are changing:
- Font
- The size
- Colors
- Effects
Installation
Composer (recommended) Use Composer to install this library from Packagist: onnov/captcha
Run the following command from your project directory to add the dependency:
Alternatively, add the dependency directly to your composer.json file:
The classes in the project are structured according to the PSR-4 standard, so you can also use your own autoloader or require the needed files directly in your code.
Usage
SYMFONY
If you use SYMFONY framework:
in services.yaml file
in the controller or service
Without framework
Get captcha with default settings:
Custom setting
The default font is ActionJackson. You can use monsterShadow or baveuse3d fonts already inside.
You can use several fonts at the same time, they will be used in random order.
You can use any TTF font, specifying the path and the proportions to it in the form of two width and height parameters (you will have to select the parameters experimentally)
Distortion effects
By default, two effects are used to distort the image in captcha:
- Interference
- Wave distortion (The algorithm is taken from the site http://captcha.ru/captchas/multiwave/)
You can turn off both effects.
You can use only one effect.
You can change the sequence of application (by default, first Interference then WaveDistortion)
Each effect can be configured.
Basic captcha settings
- setWidth(120) // image width px
- setHeight(50) // image height px
- setForegroundColor([0,0,0]) // foreground color array [R, G, B]
- setBackgroundColor([255,255,255]) // background color array [R, G, B]
- setAllowedSymbols('23456789') // symbols used to draw CAPTCHA
- number of characters in captcha
- setLengthMin(4) // minimum string length
- setLengthMax(5) // maximum string length
- size gap between symbols
- setGapMin(0) // minimum gap between symbols
- setGapMax(10) // maximum gap between symbols
- setFluctuationAmplitude(5) // symbol's vertical fluctuation amplitude
- setPadding(5) // indent from the edge of the image to the inscription
- setCharRotate(5) // The angle in degrees for char rotation
- setJpegQuality(70) // JPEG quality of CAPTCHA image
- The script tries to return the image sequentially first in the GIF format then jpg further to the PNG
- setMaybeReturnGif(false) // prevents the return of the image GIF
- setMaybeReturnJpg(false) // prevents the return of the image JPG
- setMaybeReturnPng(false) // prevents the return of the image PNG
configuration example
All versions of captcha with dependencies
ext-gd Version *