gregwar/captcha

PHP Captcha library

captcha's Issues

Move the "niceize" logic to the this repo

I already removed the "0" and the "O" from the charset because of confusion

We should add the "niceize" logic to the phrasebuilder, which would ignore the case and be nice with characters that look likes (1, l and I, O and 0 etc.)

How do I set the number of characters generated?

How to set the number of generated verification code characters, such as generating 3 character verification code pictures ?

Can you refine the verification code style?

Can individual letters use different colors?
Can you use other background confusion? Confused as small letters?

E.g:
https://www.php.cn/captcha.html

Problem on Laravel

Hi!

I'm trying to implement this module, but after having downloaded it with composer, when I add 'Gregwar\Captcha\CaptchaBuilder' to providers on any app page I get an error:
Call to undefined method Gregwar\Captcha\CaptchaBuilder::isDeferred
without acutally adding any other code.

Maybe you can help with this?

Is that better to add an accessory function to get captcha's unique id?

Before I submit a pull request, just want to make sure whether it's necessary.

With usage of capture, we also need save the phrase to validate user input. Usually we may use session or a cache component. Well, if we choose to use cache, we also need a cache key for each capture. Thanks to the fingerprint property, we can simply use md5(json_encode($captcha->getFingerprint())) or md5(implode('', $captcha->getFingerprint())) to generate an unique key as the cache key.

As mentioned above, whether it's better to add an accessory function called getToken(), just like this:

    public function getToken()
    {
        if (empty($this->getFingerprint())) {
            throw new \Exception('Captcha token can only be accessed after built');
        }
        
        return md5(implode('', $this->getFingerprint()));
    }

Get 500 error

1.php version 7.3.8 with gd extension active
2.$builder->getPhrase(); can get the captche value
3. $builder->output() get the 500 error , only numbers display,

Uppercase and lowercase are treated as the same thing

When a picture generated uses uppercase letters, ->getPhrase() returns a lowercase phrase.

PhraseBuilder definition errors

Convert all your functions to static if you want the examples to be correct like that one: $phrase = \Gregwar\Captcha\PhraseBuilder::build(5, '0123456789'); or,
define constructor, build object and call member function: $phrase = new \Gregwar\Captcha\PhraseBuilder()->build(5, '0123456789');

I created Yii Extension for this library

Hi, thanks for developing this library.
I want to tell you that I've made an extension for Yii framework based on this library. Here is the repository yii2-captcha. I hope you like it.
If there are any problem please file an issue in that repository.

Thank you.

Writing interfaces

ping @jeremylivingston

Release for symfony 4.x support

@Gregwar can you create new release?
wich include 1d06ac8
thx

once I use directly the wanted phrase to the builder, the inline() function can't be used ?

 $captcha = new CaptchaBuilder('12345');           
 var_dump($captcha->getPhrase()); // 12345           
 var_dump($captcha->inline());exit; // error: imagejpeg() expects parameter 1 to be resource, null given

long generation pictures

I noticed that in some operating systems, for example windose 7, the generation of images takes a long time and even on centos with a version of php 5.6 image is generated 0.4 sec, is it possible to somehow speed this
I did profiling and noticed multiple function call floor and ceil

Division by zero

Hello, I have recently begun to see some of that's just such a message in the log

2015/06/08 15:41:56 [error] 23082
0: *8471087 FastCGI sent in stderr: "PHP message: PHP Warning: Division by zero in /var/www/vendor/gregwar/captcha/CaptchaBuilder.php on line 321" 
request: "GET /_gcb/generate-captcha/gcb_captcha?n=1433767309?1589940139 HTTP/1.1", 

VERSION v1.1

Thank you!

Call to undefined method Gregwar\Captcha\PhraseBuilder::doNiceisze()

Hello,

I get the following error
FastCGI sent in stderr: "PHP message: PHP Fatal error: Uncaught Error: Call to undefined method Gregwar\Captcha\PhraseBuilder::doNiceisze() in /Captcha/src/Gregwar/Captcha/PhraseBuilder.php:57

Call to undefined function Gregwar\Captcha\imagettfbbox()

what`s question for this?
thanks!

Write documentation

We should write at least a little readme for this

This class feels so bloated. Can you split it up?

Captcha/src/Gregwar/Captcha/CaptchaBuilder.php

Line 14 in 4bb668e

class CaptchaBuilder implements CaptchaBuilderInterface

This class feels so bloated.
Can you split it up?

Captcha picture does not display

Hi have a look please on this site http://cyberparc.org/ hope you can tell me why the captcha picture does not show up, thank you for help.

Change the algorithm until we reach 0% OCR

I added in 00ac9a5 a file named ocr.php which will try to guess the captcha contents using ocrad

I have about 1.5% of success right now, this number is too much and should really be 0

bug count() php 7.2

PHP 7.2
Symfony 3.4
CaptchaBundle 2.0.3

What about to create new release with this db934ba patch ?

\gregwar\captcha\CaptchaBuilder.php array cout()

\gregwar\captcha\CaptchaBuilder.php

33 line
protected $textColor = [];
/**
* @var array
*/
protected $backgroundColor = [];

Can it run without composer?

My server can't use composer...
Can it be separate to single file?

How to get the error generated by a wrongly filled Captcha?

Hello.
I have the bundle already working in Symfony2.0 (having installed the 2.0 version of the bundle).
It is apparently working fine, except for a simple question.

When I type a wrong captcha, just to test the behavior and give a proper message, I am finding that the form doesn't gives any error.

When I do

 $process = $formHandler->process($confirmationEnabled);

I get a FALSE, so the form won't succeed. Tat is correct, as I typed wrongly the captcha text.

Nevertheless, after that, when I try to catch the given error

$errors = $form->getErrors();

I am getting an empty array, and so no message is coming and no message is being shown in the visual layer. I don't think that is the normal behavior.

But the weirdest part comes now:

When I inspect the form, I get no errors. That might be expected because $form->getErrors() returned an empty array, as I said before. But when I inspect the form children, I clearly can see how the captcha child HAS the error indeed. Again, this is expected, because the captcha is avoiding the form to be successfully processed. But the question is: How do I get the "internal child" error I got in the captcha child?

Attaching two images. One with the "no errors" father form. And the other with de error captcha child.

Thank you in advance!!

count(): Parameter must be an array or an object that implements Countable

php version 7.2

in vendor/gregwar/captcha/CaptchaBuilder.php at line 333

remove misleading empty wiki

the picture can't display

Hello:
I use this package in two pros,same codes, both are laravel frameworks. But only one can display the picture. I hope you can help me.Thank you in advance for your kind help and I am looking forward to your answer.

Cleaning the code

Variables should be renamed, some comments added and some things like distortion factorized

Blank image

Hello guys

Autoload installed via composer... all is well. I also created a temp directory, writable in the same directory where the files of captcha are.

The result is a blank image :-(

The code is

	$builder = new CaptchaBuilder;
	$builder->build();
	echo "<pre>"; print_r($builder); echo "</pre>"; exit;
	header('Content-type: image/jpeg');
	$builder->output();
	exit;

When i uncomment the line starting with "echo", i get a blank image and the result of the print_r (the echo line) is as follows:

What am I doing wrong?

Gregwar\Captcha\CaptchaBuilder Object
(
    [fingerprint:protected] => Array
        (
            [0] => 0
            [1] => 207
            [2] => 221
            [3] => 228
            [4] => 2
            [5] => 253
            [6] => 155
            [7] => 239
            [8] => 0
            [9] => 26
            [10] => 20
            [11] => 97
            [12] => 32
            [13] => 3
            [14] => 240
            [15] => 154
            [16] => 163
            [17] => 1
            [18] => 14
            [19] => 39
            [20] => 145
            [21] => 9
            [22] => 2
            [23] => 1
            [24] => 61
            [25] => 56
            [26] => 69
            [27] => 8
            [28] => 5
            [29] => -3
            [30] => 2
            [31] => 0
            [32] => 0
            [33] => 4
            [34] => 2
            [35] => -6
            [36] => -4
            [37] => 3
            [38] => 0
            [39] => 4
            [40] => 1
            [41] => 77
            [42] => 37
            [43] => 3
            [44] => 0
            [45] => 107
            [46] => 14
            [47] => 45
            [48] => 29
            [49] => 3
            [50] => 1
            [51] => 65
            [52] => 19
            [53] => 79
            [54] => 13
            [55] => 1
            [56] => 121
            [57] => 28
            [58] => 7
            [59] => 46
            [60] => 0
            [61] => 0
            [62] => -6
            [63] => 3
        )

    [useFingerprint:protected] => 
    [textColor:protected] => Array
        (
        )

    [backgroundColor:protected] => 
    [backgroundImages:protected] => Array
        (
        )

    [contents:protected] => Resource id #3
    [phrase:protected] => 3jfj9
    [builder:protected] => Gregwar\Captcha\PhraseBuilder Object
        (
            [length] => 5
            [charset] => abcdefghijklmnpqrstuvwxyz123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ
        )

    [distortion:protected] => 1
    [maxFrontLines:protected] => 
    [maxBehindLines:protected] => 
    [maxAngle:protected] => 8
    [maxOffset:protected] => 5
    [interpolation:protected] => 1
    [ignoreAllEffects:protected] => 
    [allowedBackgroundImageTypes:protected] => Array
        (
            [0] => image/png
            [1] => image/jpeg
            [2] => image/gif
        )

    [tempDir] => temp/
    [background] => 13622756
)

[Feature Request]Add GIF type captcha

GIF can increase the difficulty of recognition.

in php 7.2 . count(null) get a warning 7.2中的count(null) 时报警告

hi man, php 7.2 version ,CaptchBuilder 333 line, count(null) has warning ,i know error_reporting setting ,but wish you fix this bug.

你好，我在php 7.2 版本使用这个组件，但是出现了错误警告，导致不能生成验证码，我知道可以定义 error_report 错误级别忽略，但是本着严谨的态度来说，希望可以修正这个错误。

$captcha->setBackgroundImages() $bg undefined index

like the title

if (empty($this->backgroundImages)) {
            // if background images list is not set, use a color fill as a background
            $image   = imagecreatetruecolor($width, $height);
            if ($this->backgroundColor == null) {
                $bg = imagecolorallocate($image, $this->rand(200, 255), $this->rand(200, 255), $this->rand(200, 255));
            } else {
                $color = $this->backgroundColor;
                $bg = imagecolorallocate($image, $color[0], $color[1], $color[2]);
            }
            $this->background = $bg;
            imagefill($image, 0, 0, $bg);
 } else {
            // use a random background image
            $randomBackgroundImage = $this->backgroundImages[rand(0, count($this->backgroundImages)-1)];

            $imageType = $this->validateBackgroundImage($randomBackgroundImage);

            $image = $this->createBackgroundImageFromType($randomBackgroundImage, $imageType);
        }

code in this part,if set background imaes,variable $bg will not be defined!

Sometimes, the results of getPhrase and inline are partly inconsistent

Why sometimes the characters of getPhrase () and the characters in inline () are inconsistent, not all are wrong, but the case of one of the letters is inconsistent.

E.g:
The image base64 from inline () is processed in the browser, and the result displayed is YF7B
But the result of getPhrase () is Yf7B

why? Is it a browser issue or a code design issue?

Error in font file captcha2.ttf

captcha2.ttf has a problem with the capital letter "I". Instead of "I", "J

" is displayed

setBackgroundColor(r,g,b) 不生效

    $builder = new CaptchaBuilder();
    $builder->build(215,80);

    $builder->setBackgroundColor(0,0,0);

    $builder->setIgnoreAllEffects(false);
    $code=$builder->getPhrase();
    header("Cache-Control: no-cache, must-revalidate");
    header('Content-Type: image/jpeg');
    $builder->output();

Transparent background

how to get captcha with transparent background?

how to refresh image on ajax

Hi. Pls help for this subject.

from 1.1.5 update to 1.1.6。Problem appear：Can't show pictures。

Method：$builder->save('out.jpg'); or <img src="<?php echo $builder->inline(); ?>" /> no problem
The problem is that：

header('Content-type: image/jpeg');
$builder->output();

After output,inline it directly in the HTML page。
Directly nested this page in the IMG label:
<img name="randomImage" id="randomImage" src="http://test.com/login/captcha/1" title="Refresh" size="10">

The following is the code：

$phrase= new PhraseBuilder;
$code= $phrase->build(4);
$builder = new CaptchaBuilder($code, $phrase);;
$builder->setBackgroundColor(255, 255, 255);
$builder->build($width = 80, $height = 38, $font = null);
$phrase = $builder->getPhrase();
Session::flash('logincaptcha', `$phrase);`
header("Cache-Control: no-cache, must-revalidate");
header('Content-Type: image/jpeg');
$builder->output();

Why Finder 3.0 ?

Is there anything that prevents it from working with Finder 2.8?

I am using this package through gregwar/captcha-bundle, which will work with Symfony 2.8. However, gregwar/captcha requires Finder 3.0 or above. As the result, I get gregwar/captcha v1.1.3 which is not compatible with PHP 7, while Symfony 2.8 is.

Bug - Image shown is different than $expectedCode

I have no idea what exactly causes this, but some times when testing, I notice that when I fill in the image correctly, I have an error saying that it's invalid.

The $expectedCode isn't equal to $form->getData() and mostly happens after testing the same form a couple of times. I can only fix this with a hard page reload or a manual press on "renew". The return is not null, it's an actual different code than show in the image.

My configuration:

gregwar_captcha:
    quality:          100
    distortion:       false
    height:           65
    width:            270
    reload:           true
    as_url:           true
    interpolation:    true
    background_color: [255, 255, 255]

Putting captcha field and captcha renew link at the same row

cani Putting captcha field and captcha renew link at the same row ??
And how can i change the term "renew" to an icon??

What am i doing wrong?

I installed via composer

build(); header('Content-type: image/jpeg'); $builder->output(); On IE , in the console, i see DOM7009: Unable to decode image at URL: '<>' with MIME: 'image/jpeg'. In firefox, in the main browser window, i see "the image <<>> cannot be displayed as it contains errors If i remove the header line, i do see a lot of junk chars and a jpeg header being sent out. So it does look like i have the relevant libraries for PHP installed $my_dir is outside my web directory, but i don't think that should matter, right? Thanks in advance for any help!!!!

text_color works only in global config.yml ?

Hi
I'm tring to put the text_color parameter in the form definition as the follow exemple:
$builder->
add(...)
...
->add('captcha', 'captcha', array('text_color' => array(255,0,0) ))
...

But seems that it takes only the global config in the config.yml :
....
gregwar_captcha:
width: 100
height: 50
quality: 20
background_color: [255, 255, 255]
text_color: [255, 0, 0]
...

Can you check please ?
Thanx
Andrea

Fatal error in PHP 7.4 : Uncaught Error: Call to undefined function Gregwar\Captcha\imagejpeg() in

Hello Guys!!!

I see there is an error in php 7.4 version with Call to undefined function Gregwar\Captcha\imagejpeg()

this error is coming up on line number 565 in below file vendor/gregwar/captcha/src/Gregwar/Captcha/CaptchaBuilder.php

Can you please see it and fix it !!!

Thanks

Captcha render text I to J

Hello,

I'm using Captcha, and I have noticed that sometimes the code i.e ABIDE will be built as ABJDE in image.

Do you have any idea why is that mistake happened by Captcha builder->build()?

maybe use mbstring in `CaptchaBuilder.php` and give additional params to accept font offset for other fonts

I have change this in my copy to use my font，it works.

strlen($phrase) => mb_strlen($phrase)
$phrase[$i] => mb_substr($phrase, $i, 1)

How can I reload the captcha with AJAX?

I have a form, on submit button click, with AJAX I am calling the php that sends the mail and once the email is sent the form refreshes, how can I generate a new captcha once the form is sent?

$builder->testPhrase always returns false

I tried captcha as explained in readme file but it doesn't work

<?php

require_once 'vendor/autoload.php';

session_start();

use Gregwar\Captcha\CaptchaBuilder;
$builder = new CaptchaBuilder;
$builder->buildAgainstOCR(); // Also tried with build() method

if (!empty($_POST['submit'])) {
    $user_input = $_POST['captcha'];
    if ($builder->testPhrase($user_input)) {
        echo "OK!";
    } else {
        echo "Wrong answer";
    }
}
?>

<!doctype html>
<html lang="tr">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <img src="<?= $builder->inline(); ?>" alt="">
    <form action="captcha-test.php" method="post">
        <label for="captcha">Enter Text: </label>
        <input name="captcha" id="captcha">
        <input type="submit" name="submit" value="OK">
    </form>
</body>
</html>

ErrorException: count()

ErrorException: count(): Parameter must be an array or an object that implements Countable in C:\OpenServer\domains\site.dev\vendor\gregwar\captcha\CaptchaBuilder.php:333

I'm using PHP 7.2 RC2

both upper & lower case in v1.1.8

In v1.1.7, getPhrase() will only return string in lower-case,
while in v1.1.8, getPhrase() will return upper&lower characters.
if there is a notice in README, it'll be better to prevent someone get confused after doing composer update