#Outline Captcha

Light weight captcha image generator for php based web projects. It consists of just one file and three sample fonts. ImageMagic is used for image generation.

How it looks

Default settings

sample 1	sample 2	sample 3

Deviations

One can adjust generated string length, resulting image size in pixels, text color and background color.

sample 4	sample 5	sample 6

How to use

PHP in general

$captcha =  new OutlineCaptcha();
$captcha->setFontPath('/path/to/fonts'); 
$captchaInfo = $captcha->createCaptchaImage();

$captchaString = $captchaInfo["string"];
$captchaImage = $captchaInfo["image"];

<img src="<?php echo $captchaImage ?>"/>

Laravel

$captcha =  $this->app->make('OutlineCaptcha');
$captchaInfo = $captcha->createCaptchaImage();

$captchaString = $captchaInfo["string"];
$captchaImage = $captchaInfo["image"];

<img src="{!! $captchaImage !!}"/>

Overriding default settings

$captchaOptions = [
            "width"=>150,
            "height"=>100,
            "length"=>3,
            "fileType"=>"png",
            "color"=>'rgb(133, 244, 199)',
            "background"=>'rgb(33, 77, 77)'
        ];
$captcha =  new OutlineCaptcha($captchaOptions);
// Laravel
// $captcha =  $this->app->make('OutlineCaptcha', [$captchaOptions]);

How to install

Copy OutlineCaptcha.php to your application classes directory. Copy outlineFonts folder to your application resources. For the program to know where the fonts are you should either:

• Call setFontPath funtion like $captcha->setFontPath('/path/to/fonts') every time you create OutlineCaptcha class.

or:

• Adjust the fisrt line of OutlineCaptcha class constructor.

Some more information

Some options can result in totally unreadable captcha image.

• When you decrease image pixel length it is harder to read the resulting captcha and reverse.
• When you increase captcha string length it is harder to read the resulting captcha and reverse.

Try to use simple and distinctive colors.

License

The Outline Captcha utility is open-sourced software licensed under the MIT license.