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Peast(PHP ECMAScript Abstract Syntax Tree) is a PHP 5.4+ library that parses JavaScript code, according toECMAScript specification, and generates an abstract syntax tree following theESTree standard.

Include the following requirement to your composer.json:

{"require": {"mck89/peast":"dev-master"}}

Runcomposer 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!

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 setxdebug.max_nesting_level to a higher value, such as 512.

Read the documentation for more examples and explanations:

1. AST generation and tokenization
2. Tree Traversing
3. Querying By Selector
4. Rendering

Changelog