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Peast ========== [](https://packagist.org/packages/mck89/peast) [](https://packagist.org/packages/mck89/peast) [](https://packagist.org/packages/mck89/peast) [](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 ------------- Include the following requirement to your composer.json: ```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: ```php require_once "vendor/autoload.php"; $source = "var a = 1"; // Your JavaScript code $ast = Peast\Peast::latest($source, $options)->parse(); // Parse it! ``` 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 ------------- 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)
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