# PureCaptcha **Repository Path**: mirrors_OWASP/PureCaptcha ## Basic Information - **Project Name**: PureCaptcha - **Description**: OWASp PureCaptcha project - **Primary Language**: Unknown - **License**: Not specified - **Default Branch**: master - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 0 - **Forks**: 0 - **Created**: 2020-08-19 - **Last Updated**: 2025-06-16 ## Categories & Tags **Categories**: Uncategorized **Tags**: None ## README PureCaptcha =========== OWASP PureCaptcha project aims to help developers use easy-to-user independent CAPTCHAs in their project with zero hassle. Traditionally, using CAPTCHAs required making accounts in a third party provider and using rigorous APIs, or installing many libraries and then using text rendering and image modification libraries to render a CAPTCHA image. PureCaptcha on the other hand, aims to do all of the above in one step. It includes very simple code to render a few ASCII characters into bitmap images, and code to modify, scale, rotate and distort simple bitmap images. It then outputs the CAPTCHA as a simple monochrome BMP image (which has a very small size). It also provides example usages for CAPTCHAs. It is of utmost importance to properly use CAPTCHAs, otherwise side-channel and logical attacks would be viable on the system. Read more about OWASP PureCaptcha at https://www.owasp.org/index.php/OWASP_PureCaptcha ##Usage## **Basic usage** Use the following script as the source of the captcha image. require_once "purecaptcha.php"; $pureCaptcha = new PureCaptcha(); $captcha = $pureCaptcha->show(); Store `$captcha` in the session and compare it user input later. **Complete API** **captcha** : The text to be displayed in captcha **length** : The length of the captcha text **spacing** : The spacing between two characters in the captcha **degree** : The degree of rotation of captcha text in clockwise direcion **scaleX** : Amount to be scaled in x direction **scaleY** : Amount to be scaled in y direction **noisePercent** : The noise percentage // Getters and setters are provided for each $pureCaptcha->setCaptcha("M2H7"); $captha = $pureCaptcha->getCaptcha();