Most voted "captcha" questions
CAPTCHA is an acronym for the expression "Completely Automated Public Turing test to Tell Computers and Humans Apart" (a fully automated public Turing test for differentiation between computers and humans): a cognitive challenge test, used as an anti-human toolspam, pioneered at Carnegie-Mellon University.
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23
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answer1699
viewsHow does a CAPTCHA work?
I understand that a CAPTCHA is a way for me to ensure that the user who interacts with my system is a human being and not a script. But this is the simple explanation that we give to laypeople. How…
captchaasked 7 years, 5 months ago Oralista de Sistemas 23,115 -
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answer389
viewsHow to trace letters and cut them?
I have this image below. As you can see, they are together. In this case, it’s a "7", "h" and "a". It is possible to scan the image to find them and then cut them where exactly you found them? I’m…
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8
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answers5579
viewsSimple National Optional Consultation (by CNPJ)
I’m trying to implement a query of Simples Nacional, the operation is similar to the consultation by CNPJ of the recipe. Details I’ve understood so far: After loading the page, runs a ajax (filing…
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5
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answer780
viewsValidate captcha with PHP
I have a captcha in a form where an image with 5 randomly generated values is displayed. How do I validate the captcha and only send the contact if the input value is equal to the one generated by…
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5
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answer3605
viewsSimple National Opting Query (by CNPJ) - C#
I am implementing in C# a Consultation of Company Opting for the National Simple Tax Regime through this link…
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4
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answer1124
viewsImage Check (Captcha) does not work
My script has a registration form only that the captcha no letters appear: I’ll leave the code below: <?php define('SI_IMAGE_JPEG', 1); define('SI_IMAGE_PNG', 2); define('SI_IMAGE_GIF', 3); class…
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4
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answers5046
viewsHow to validate Google reCaptcha / noCaptcha in PHP?
How to send such POST that Google asks and so make my field validated?
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3
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answers3391
viewsValidate captcha before sending form
I need a very simple captcha, but it can be validated before the form is sent, how can I do it? Currently use this: index.html <form method="post" action="valida.php" id="form" name="form">…
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2
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answers339
viewsCAPTCHA in stateless API
How to use CAPTCHA in a stateless application? If not, what is the alternative to this?
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2
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answer373
viewsResolve caches using PHP
I Googled, but I didn’t find anything satisfactory for my needs. I wonder if anyone knows any solution to solve Blanks like this one using PHP. I have basic knowledge about Imagick and GD libraries,…
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2
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answers2561
viewsCaptcha reader in Portuguese - Google noCaptcha reCaptcha
Hello, I am implementing a captcha in my system, looking on google I got tutorials and got by the captcha of google that is very mass and already comes with a spoken option to answer the captcha…
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2
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answers449
viewsCAPTCHA Google in Java
I’m having trouble deploying Google’s CAPTCHA. On the form page I added the script and the div of captcha: <head> <script src='https://www.google.com/recaptcha/api.js'></script>…
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2
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answer485
viewsScript captcha generator in PHP does not generate the image
I am trying to run the site script below, which generates captcha, but the image is never generated. Can anyone give me a light of what I might be doing? I’m running the script via Docker. Page:…
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answers85
viewsTheoretical doubt about captcha and Curl php
I saw code snippets where people use the curl to catch the captcha image, but it is possible to catch the string that is in the picture ? From what I understand, the complexity of catching captcha…
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1
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answers955
viewsQuery NFE site http://www.nfe.fazenda.gov.br/portal/consultaRecaptcha.aspx?tipConsulta=completa&tipConteudo=XbSeqxE8pl8=
I used to feed my system with note data informing the note key and captcha, But with the change to reCaptcha is no longer possible. How can I do this using Webservice in PHP ? Does anyone have an…
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1
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answers20
viewsProblem detecting captcha creation
I’m logging in the system, but I’ve reached a point where I can’t think of a logic to execute. When the user tries to log in and misses the password 3 times, a captcha will appear on the login…
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1
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answer40
viewsHow do I pull the CAPTCHA Poup with Javascript into my form in my ERP management system?
The http://www.sintegra.gov.br/ is a government website with public information about companies. When accessing the site I need to inform the CNPJ, select the UF of the CNPJ and fill the CAPTCHA...…
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1
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answers36
viewsHow to play audio from a captcha in PHP?
Hello. I developed a simple CAPTCHA in PHP and now I’m trying to make a script that generates an audio from the generated code. I have an mp3 audio for each letter and number, and my momentary…
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answer18
viewsCaptcha for Formidable (Form) - Wordpress
Good afternoon! I’m in need of a captcha plugin that works together with Formidable. In this case, what you already have in Formidable only works in one form per page, and since I need to use 2x on…
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0
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answer588
viewsImplement recaptcha in an Ionic app
I tried to use all the plugins I found to check (captcha) within my application. I am using the Ionic framework. I wonder if there is a plugin that works inside the html code in this case. Some of…
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0
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answer261
viewsCallback from reCaptcha when user misses
Is there any google reCaptcha function that is enabled when user misses options ?
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answers456
viewsFill CAPTCHA field via CURL PHP with "Submit in Javascript"
How do I fill a field of a page in Curl and this does not send the data via form, but via Javascript? The page in question is this: <script type='text/javascript'…
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0
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answer67
viewsError creating captcha image "The http://localhost/project/index.php image contains errors and cannot be displayed"
I’m studying a book in which the code is the same and even then it doesn’t work someone can tell me what could be happening? <?php $pass_chars = ""; for($i = 0; $i < CAPTCHA_NUMCHARS; $i++){…
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answer278
viewsError in captcha
I have the following error in the captcha: Notice: Undefined index: captcha in C: xampp htdocs darknetwork index.php on >line 7 and also it is only returning me the Else even if you give a F5 on…
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answer403
viewsRecaptcha Invisible
I’m trying to implement Captcha Recaptcha Invisible on my site but I don’t know how to do this implementation, how can I do it? (Yes, I already have the host registered). If it is interesting (I…
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answers61
viewsIs it correct to merge audio files using fwrite() in PHP?
I’m developing a script of a captcha simple in PHP and I challenged myself to be able to generate an audio file to help people with visual impairments. I didn’t know exactly how to do this, but I…
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answers100
viewsHelp to translate captcha by using the python, csv and Tesseract language [closed]
I’m trying to make the recognition of these images, I’ve tried several types and I can’t identify with the tesserat because of the lines and scratches I get the site information below and can’t…
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answers126
viewsHow to recognize images using python, cv2, Pillow and Tesseract?
I’m trying to recognize the images below, but I’m not able to abstract the content correctly. A few examples: Code import numpy as np import cv2 import mahotas import pytesseract as ocr from PIL…
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answer180
viewsI’m using Captcha but there are still robot attacks
In the form Submit I am using the standard validation of Capctha (version 2 of Google) for the firing of e-mail, but for some reason robot attacks still pass, filling my inbox. I make the check as…
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answer34
viewsList table values randomly with RAND() or ARRAY for a Captcha
I’m creating a CAPTCHA and for that I made a table with alternatives that the user will have to select the IMAGE correct. First I draw a word. Example: You must select the word FAN And then I put…
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answer436
viewsHow to redirect form to a verification code?
When the user clicks on "Sign up", the service asks you to enter the security verification words. If you cannot read what is written, you can click on the "Try different words" link, or you can…
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answers52
viewsCaptcha error with Magento: Call to a Member Function getBlockName
I manage a virtual store, the site is off the air and when I access the administrator gives this error: Call to a Member Function getBlockName() on a non-object in…