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[Parsing & Serialization](/categories/parsing) 4. / 5. smuuf/php-peg ActiveLibrary[Parsing & Serialization](/categories/parsing) smuuf/php-peg ============= PEG parser generator for PHP. 3.1.0(1y ago)12118.4k↑42.5%6[1 PRs](https://github.com/smuuf/php-peg/pulls)3MITPHPPHP >=8.0 Since Nov 1Pushed 1y ago4 watchersCompare [ Source](https://github.com/smuuf/php-peg)[ Packagist](https://packagist.org/packages/smuuf/php-peg)[ Docs](https://github.com/smuuf/php-peg)[ RSS](/packages/smuuf-php-peg/feed)WikiDiscussions master Synced 1mo ago READMEChangelog (8)Dependencies (2)Versions (15)Used By (3) PEG parser-generator for PHP ============================ [](#peg-parser-generator-for-php) ### Disclaimer [](#disclaimer) This is a *somehow opinionated* continuation of [combyna/php-peg](https://github.com/combyna/php-peg), which was "a minimally invasive fork" of the original [hafriedlander/php-peg](https://github.com/hafriedlander/php-peg). From the several originally available types of PEG parsers only `Basic` and `Packrat` *(recommended)* remain now. Notable features of this fork: ------------------------------ [](#notable-features-of-this-fork) - **Fix, Optimization**: *Packrat parser overhaul.* Simplified logic using arrays instead of a string. Arrays ultimately seemed to be more fit for the job, *memory-wise*. This also fixed occasional problem with accessing undefined indexes in packrat cache. - **Modern code style:** Codebase uses new *(PHP7+)* language features and code format more familiar to current modern PHP. - **CLI interface is removed:** Just call `\hafriedlander\Peg\Compiler::compile($grammarDefinitionFile)` directly however you like. - **Testing**: Test suite is rewritten to use [`Nette Tester`](https://github.com/nette/tester) instead of [PHPUnit](https://github.com/sebastianbergmann/phpunit). - **Fixed**: Catastrophic backtracking problem *(sometimes happening when compiling a larger grammar)* avoided by simplifying regex that searches for grammar definitions. - **Optimization**: Using native PHP constants and functions with absolute namespace is slightly faster *(changed in generated code, too)*. - **Optimization**: Use strict comparisons where possible *(even in generated code)*. Documentation ------------- [](#documentation) See the [documentation of the original library](https://github.com/hafriedlander/php-peg). ### Health Score 48 — FairBetter than 95% of packages Maintenance36 Infrequent updates — may be unmaintained Popularity41 Moderate usage in the ecosystem Community24 Small or concentrated contributor base Maturity76 Established project with proven stability Bus Factor1 Top contributor holds 62.5% 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 ~279 days Recently: every ~413 days Total 14 Last Release 582d ago Major Versions 1.0.2 → 2.0.02017-03-03 2.2.3 → 3.0.02022-04-25 PHP version history (4 changes)1.0.0PHP >=5.3.0 2.1PHP >=7.0 3.0.0PHP >=7.4 3.1.0PHP >=8.0 ### Community Maintainers ![](https://avatars.githubusercontent.com/u/6860713?v=4)[Přemysl Karbula](/maintainers/smuuf)[@smuuf](https://github.com/smuuf) --- Top Contributors [![smuuf](https://avatars.githubusercontent.com/u/6860713?v=4)](https://github.com/smuuf "smuuf (30 commits)")[![hnesk](https://avatars.githubusercontent.com/u/186821?v=4)](https://github.com/hnesk "hnesk (7 commits)")[![asmblah](https://avatars.githubusercontent.com/u/1714005?v=4)](https://github.com/asmblah "asmblah (3 commits)")[![peter-kolenic](https://avatars.githubusercontent.com/u/3885371?v=4)](https://github.com/peter-kolenic "peter-kolenic (3 commits)")[![djaf77](https://avatars.githubusercontent.com/u/8984222?v=4)](https://github.com/djaf77 "djaf77 (2 commits)")[![uwetews](https://avatars.githubusercontent.com/u/1246127?v=4)](https://github.com/uwetews "uwetews (1 commits)")[![simonwelsh](https://avatars.githubusercontent.com/u/125915?v=4)](https://github.com/simonwelsh "simonwelsh (1 commits)")[![cognifloyd](https://avatars.githubusercontent.com/u/1558590?v=4)](https://github.com/cognifloyd "cognifloyd (1 commits)") --- Tags parserDSLcompilerpeg ### Code Quality Static AnalysisPHPStan Type Coverage Yes ### Embed Badge ![Health badge](/badges/smuuf-php-peg/health.svg) ``` [![Health](https://phpackages.com/badges/smuuf-php-peg/health.svg)](https://phpackages.com/packages/smuuf-php-peg) ``` ### Alternatives [nikic/php-parser A PHP parser written in PHP 17.4k902.6M1.8k](/packages/nikic-php-parser)[doctrine/lexer PHP Doctrine Lexer parser library that can be used in Top-Down, Recursive Descent Parsers. 11.2k910.8M118](/packages/doctrine-lexer)[erusev/parsedown Parser for Markdown. 15.0k151.8M732](/packages/erusev-parsedown)[behat/gherkin Gherkin DSL parser for PHP 1.1k176.3M97](/packages/behat-gherkin)[league/commonmark Highly-extensible PHP Markdown parser which fully supports the CommonMark spec and GitHub-Flavored Markdown (GFM) 3.0k404.0M702](/packages/league-commonmark)[masterminds/html5 An HTML5 parser and serializer. 1.8k242.8M229](/packages/masterminds-html5) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)