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[Utility & Helpers](/categories/utility) 4. / 5. phpseclib/mcrypt\_compat ActiveLibrary[Utility & Helpers](/categories/utility) phpseclib/mcrypt\_compat ======================== PHP 5.x-8.x polyfill for mcrypt extension 2.0.7(1y ago)28129.7M↑10.1%62[5 issues](https://github.com/phpseclib/mcrypt_compat/issues)[1 PRs](https://github.com/phpseclib/mcrypt_compat/pulls)20MITPHPPHP >=5.6.1CI failing Since Jul 3Pushed 1mo ago8 watchersCompare [ Source](https://github.com/phpseclib/mcrypt_compat)[ Packagist](https://packagist.org/packages/phpseclib/mcrypt_compat)[ Patreon](https://www.patreon.com/phpseclib)[ Fund](https://tidelift.com/funding/github/packagist/phpseclib/mcrypt_compat)[ RSS](/packages/phpseclib-mcrypt-compat/feed)WikiDiscussions master Synced 1mo ago READMEChangelog (10)Dependencies (2)Versions (29)Used By (20) mcrypt\_compat ============== [](#mcrypt_compat) [![CI Status](https://github.com/phpseclib/mcrypt_compat/actions/workflows/ci.yml/badge.svg?branch=master&event=push "CI Status")](https://github.com/phpseclib/mcrypt_compat/actions/workflows/ci.yml?query=branch%3Amaster) PHP 5.x-8.x polyfill for mcrypt extension. Supporting mcrypt\_compat ------------------------- [](#supporting-mcrypt_compat) - [Become a backer or sponsor on Patreon](https://www.patreon.com/phpseclib) - [One-time donation via PayPal or crypto-currencies](http://sourceforge.net/donate/index.php?group_id=198487) - [Subscribe to Tidelift](https://tidelift.com/subscription/pkg/packagist-phpseclib-mcrypt-compat?utm_source=packagist-phpseclib-mcrypt-compat&utm_medium=referral&utm_campaign=readme) Installation ------------ [](#installation) With [Composer](https://getcomposer.org/): ``` composer require phpseclib/mcrypt_compat ``` Supported algorithms -------------------- [](#supported-algorithms) - rijndael-128 - rijndael-192 - rijndael-256 - des - blowfish - rc2 - tripledes - arcfour Unsupported algorithms ---------------------- [](#unsupported-algorithms) - cast-128 - gost - cast-256 - loki97 - saferplus - wake - blowfish-compat - serpent - xtea - enigma Supported modes --------------- [](#supported-modes) - cbc - ncfb - cfb - ctr - ecb - nofb - ofb - stream mcrypt\_compat's `ncfb` implementation has some incompatibles with mcrypt's implementation where `mcrypt_generic` and `mdecrypt_generic` are concerned. The unit tests elaborate. Emulating older PHP versions ---------------------------- [](#emulating-older-php-versions) The mcrypt extension's behavior underwent changes as new versions of PHP were released. By default mcrypt\_compat emulates the behavior of PHP 7.1 but if you need to emulate how mcrypt behaved in, say, PHP 5.3.0, you may do so by doing `define('PHPSECLIB_MCRYPT_TARGET_VERSION', '5.3.0');` before including vendor/autoload.php (if you're using this with Composer). Security contact information ---------------------------- [](#security-contact-information) To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure. ### Health Score 64 ↑ FairBetter than 99% of packages Maintenance67 Regular maintenance activity Popularity69 Solid adoption and visibility Community36 Small or concentrated contributor base Maturity69 Established project with proven stability Bus Factor1 Top contributor holds 92.1% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~113 days Recently: every ~64 days Total 28 Last Release 555d ago Major Versions 1.0.13 → 2.0.22022-01-30 1.0.14 → 2.0.32022-03-27 1.0.15 → 2.0.42022-12-19 1.0.16 → 2.0.52024-02-23 1.0.17 → 2.0.62024-02-26 PHP version history (3 changes)1.0.0PHP >=5.3.0 1.0.2PHP >=5.3.3 2.0.0PHP >=5.6.1 ### Community Maintainers ![](https://www.gravatar.com/avatar/1214cf33299ce51f30c9c199cf3b55e8630cc16d5df714c551407088937e9988?d=identicon)[terrafrost](/maintainers/terrafrost) --- Top Contributors [![terrafrost](https://avatars.githubusercontent.com/u/214474?v=4)](https://github.com/terrafrost "terrafrost (139 commits)")[![shimooka](https://avatars.githubusercontent.com/u/133541?v=4)](https://github.com/shimooka "shimooka (6 commits)")[![peter279k](https://avatars.githubusercontent.com/u/9021747?v=4)](https://github.com/peter279k "peter279k (1 commits)")[![theodorejb](https://avatars.githubusercontent.com/u/3053271?v=4)](https://github.com/theodorejb "theodorejb (1 commits)")[![theofidry](https://avatars.githubusercontent.com/u/5175937?v=4)](https://github.com/theofidry "theofidry (1 commits)")[![drpayyne](https://avatars.githubusercontent.com/u/22623301?v=4)](https://github.com/drpayyne "drpayyne (1 commits)")[![umitakkaya](https://avatars.githubusercontent.com/u/1472822?v=4)](https://github.com/umitakkaya "umitakkaya (1 commits)")[![KiNgMaR](https://avatars.githubusercontent.com/u/438358?v=4)](https://github.com/KiNgMaR "KiNgMaR (1 commits)") --- Tags mcryptmcrypt-extensionpolyfillencryptionmcryptcryptograpy ### Code Quality TestsPHPUnit ### Embed Badge ![Health badge](/badges/phpseclib-mcrypt-compat/health.svg) ``` [![Health](https://phpackages.com/badges/phpseclib-mcrypt-compat/health.svg)](https://phpackages.com/packages/phpseclib-mcrypt-compat) ``` ### Alternatives [symfony/polyfill-mbstring Symfony polyfill for the Mbstring extension 7.8k1.2B515](/packages/symfony-polyfill-mbstring)[paragonie/random_compat PHP 5.x polyfill for random\_bytes() and random\_int() from PHP 7 8.2k655.0M405](/packages/paragonie-random-compat)[symfony/polyfill-ctype Symfony polyfill for ctype functions 4.0k982.0M125](/packages/symfony-polyfill-ctype)[symfony/polyfill-php72 Symfony polyfill backporting some PHP 7.2+ features to lower PHP versions 4.7k674.7M31](/packages/symfony-polyfill-php72)[symfony/polyfill-intl-idn Symfony polyfill for intl's idn\_to\_ascii and idn\_to\_utf8 functions 3.4k774.6M90](/packages/symfony-polyfill-intl-idn)[symfony/polyfill-intl-normalizer Symfony polyfill for intl's Normalizer class and related functions 2.1k830.2M36](/packages/symfony-polyfill-intl-normalizer) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)