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[Parsing & Serialization](/categories/parsing) 4. / 5. mck89/peast ActiveLibrary[Parsing & Serialization](/categories/parsing) mck89/peast =========== Peast is PHP library that generates AST for JavaScript code v1.17.6(1mo ago)19037.7M↓25.3%24[1 issues](https://github.com/mck89/peast/issues)20BSD-3-ClausePHPPHP >=5.4.0CI passing Since Sep 11Pushed 1mo ago9 watchersCompare [ Source](https://github.com/mck89/peast)[ Packagist](https://packagist.org/packages/mck89/peast)[ RSS](/packages/mck89-peast/feed)WikiDiscussions master Synced 1w ago READMEChangelog (10)Dependencies (3)Versions (70)Used By (20) Peast ===== [](#peast) [![Latest Stable Version](https://camo.githubusercontent.com/01dc14dda7553d254bb5740be57bc53fbc55fad957d4d1bffb3fc620b27c7cf4/68747470733a2f2f706f7365722e707567782e6f72672f6d636b38392f70656173742f762f737461626c65)](https://packagist.org/packages/mck89/peast)[![Total Downloads](https://camo.githubusercontent.com/ebcfc86965e1aa084159376b3d9cdd4cabdbe30b27837aaff08d0e47082a5ad4/68747470733a2f2f706f7365722e707567782e6f72672f6d636b38392f70656173742f646f776e6c6f616473)](https://packagist.org/packages/mck89/peast)[![License](https://camo.githubusercontent.com/de9e95bd9338cfda81c20aa0b8722029a176fd5d31f15fca60a5e0def533150c/68747470733a2f2f706f7365722e707567782e6f72672f6d636b38392f70656173742f6c6963656e7365)](https://packagist.org/packages/mck89/peast)[![Build Status](https://github.com/mck89/peast/actions/workflows/test.yml/badge.svg)](https://github.com/mck89/peast/actions/workflows/test.yml) **Peast** *(PHP ECMAScript Abstract Syntax Tree)* is a PHP 5.4+ library that parses JavaScript code, according to [ECMAScript specification](http://www.ecma-international.org/publications/standards/Ecma-262.htm), and generates an abstract syntax tree following the [ESTree standard](https://github.com/estree/estree). Installation ------------ [](#installation) Include the following requirement to your composer.json: ``` { "require": { "mck89/peast": "dev-master" } } ``` Run `composer install` to install the package. Then in your script include the autoloader and you can start using Peast: ``` require_once "vendor/autoload.php"; $source = "var a = 1"; // Your JavaScript code $ast = Peast\Peast::latest($source, $options)->parse(); // Parse it! ``` Known issues ------------ [](#known-issues) When Xdebug is enabled and Peast is used to scan code that contains deeply nested functions, this fatal error can appear: ``` PHP Fatal error: Maximum function nesting level of '512' reached, aborting! ``` or ``` PHP Warning: Uncaught Error: Xdebug has detected a possible infinite loop, and aborted your script with a stack depth of '256' frames ``` To prevent this you can set `xdebug.max_nesting_level` to a higher value, such as 512. Documentation ------------- [](#documentation) Read the documentation for more examples and explanations: 1. [AST generation and tokenization](doc/ast-and-tokenization.md) 2. [Tree Traversing](doc/tree-traversing.md) 3. [Querying By Selector](doc/querying-by-selector.md) 4. [Rendering](doc/rendering.md) [Changelog](doc/changelog.md) ### Health Score 70 — ExcellentBetter than 100% of packages Maintenance90 Actively maintained with recent releases Popularity68 Solid adoption and visibility Community37 Small or concentrated contributor base Maturity73 Established project with proven stability Bus Factor1 Top contributor holds 97.6% 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 ~53 days Recently: every ~74 days Total 67 Last Release 46d ago ### Community Maintainers ![](https://www.gravatar.com/avatar/d80aaab62ed0d1a3d39fe7e3d8fca53855514e6503d704182cc4d7f0346fd9ba?d=identicon)[mck89](/maintainers/mck89) --- Top Contributors [![mck89](https://avatars.githubusercontent.com/u/466041?v=4)](https://github.com/mck89 "mck89 (678 commits)")[![jrfnl](https://avatars.githubusercontent.com/u/663378?v=4)](https://github.com/jrfnl "jrfnl (5 commits)")[![malte-christian](https://avatars.githubusercontent.com/u/3236302?v=4)](https://github.com/malte-christian "malte-christian (2 commits)")[![reedy](https://avatars.githubusercontent.com/u/67615?v=4)](https://github.com/reedy "reedy (2 commits)")[![sdnunca](https://avatars.githubusercontent.com/u/23708351?v=4)](https://github.com/sdnunca "sdnunca (1 commits)")[![seka19](https://avatars.githubusercontent.com/u/2714877?v=4)](https://github.com/seka19 "seka19 (1 commits)")[![siddharthvp](https://avatars.githubusercontent.com/u/31818903?v=4)](https://github.com/siddharthvp "siddharthvp (1 commits)")[![andypost](https://avatars.githubusercontent.com/u/73713?v=4)](https://github.com/andypost "andypost (1 commits)")[![soullivaneuh](https://avatars.githubusercontent.com/u/1698357?v=4)](https://github.com/soullivaneuh "soullivaneuh (1 commits)")[![exussum12](https://avatars.githubusercontent.com/u/1102850?v=4)](https://github.com/exussum12 "exussum12 (1 commits)")[![krizalys](https://avatars.githubusercontent.com/u/1499352?v=4)](https://github.com/krizalys "krizalys (1 commits)")[![schlessera](https://avatars.githubusercontent.com/u/83631?v=4)](https://github.com/schlessera "schlessera (1 commits)") --- Tags ast-generationecmascriptjavasciptjavascriptparserparsingphpsyntax-treetokenizertraversevalidator ### Code Quality TestsPHPUnit ### Embed Badge ![Health badge](/badges/mck89-peast/health.svg) ``` [![Health](https://phpackages.com/badges/mck89-peast/health.svg)](https://phpackages.com/packages/mck89-peast) ``` ### Alternatives [karriere/json-decoder JsonDecoder implementation that allows you to convert your JSON data into PHP class objects 141439.4k12](/packages/karriere-json-decoder)[sauladam/shipment-tracker Parses tracking information for several carriers, like UPS, USPS, DHL and GLS by simply scraping the data. 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