122 lines
4.9 KiB
Markdown
122 lines
4.9 KiB
Markdown
<h1 align="center">PHPDoc Parser for PHPStan</h1>
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<p align="center">
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<a href="https://github.com/phpstan/phpdoc-parser/actions"><img src="https://github.com/phpstan/phpdoc-parser/workflows/Build/badge.svg" alt="Build Status"></a>
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<a href="https://packagist.org/packages/phpstan/phpdoc-parser"><img src="https://poser.pugx.org/phpstan/phpdoc-parser/v/stable" alt="Latest Stable Version"></a>
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<a href="https://choosealicense.com/licenses/mit/"><img src="https://poser.pugx.org/phpstan/phpstan/license" alt="License"></a>
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<a href="https://phpstan.org/"><img src="https://img.shields.io/badge/PHPStan-enabled-brightgreen.svg?style=flat" alt="PHPStan Enabled"></a>
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</p>
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This library `phpstan/phpdoc-parser` represents PHPDocs with an AST (Abstract Syntax Tree). It supports parsing and modifying PHPDocs.
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For the complete list of supported PHPDoc features check out PHPStan documentation. PHPStan is the main (but not the only) user of this library.
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* [PHPDoc Basics](https://phpstan.org/writing-php-code/phpdocs-basics) (list of PHPDoc tags)
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* [PHPDoc Types](https://phpstan.org/writing-php-code/phpdoc-types) (list of PHPDoc types)
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* [phpdoc-parser API Reference](https://phpstan.github.io/phpdoc-parser/namespace-PHPStan.PhpDocParser.html) with all the AST node types etc.
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This parser also supports parsing [Doctrine Annotations](https://github.com/doctrine/annotations). The AST nodes live in the [PHPStan\PhpDocParser\Ast\PhpDoc\Doctrine namespace](https://phpstan.github.io/phpdoc-parser/namespace-PHPStan.PhpDocParser.Ast.PhpDoc.Doctrine.html). The support needs to be turned on by setting `bool $parseDoctrineAnnotations` to `true` in `Lexer` and `PhpDocParser` class constructors.
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## Installation
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```
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composer require phpstan/phpdoc-parser
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```
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## Basic usage
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```php
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<?php
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require_once __DIR__ . '/vendor/autoload.php';
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use PHPStan\PhpDocParser\Ast\PhpDoc\ParamTagValueNode;
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use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocNode;
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use PHPStan\PhpDocParser\Ast\Type\IdentifierTypeNode;
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use PHPStan\PhpDocParser\Lexer\Lexer;
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use PHPStan\PhpDocParser\Parser\ConstExprParser;
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use PHPStan\PhpDocParser\Parser\PhpDocParser;
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use PHPStan\PhpDocParser\Parser\TokenIterator;
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use PHPStan\PhpDocParser\Parser\TypeParser;
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// basic setup
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$lexer = new Lexer();
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$constExprParser = new ConstExprParser();
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$typeParser = new TypeParser($constExprParser);
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$phpDocParser = new PhpDocParser($typeParser, $constExprParser);
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// parsing and reading a PHPDoc string
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$tokens = new TokenIterator($lexer->tokenize('/** @param Lorem $a */'));
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$phpDocNode = $phpDocParser->parse($tokens); // PhpDocNode
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$paramTags = $phpDocNode->getParamTagValues(); // ParamTagValueNode[]
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echo $paramTags[0]->parameterName; // '$a'
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echo $paramTags[0]->type; // IdentifierTypeNode - 'Lorem'
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```
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### Format-preserving printer
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This component can be used to modify the AST
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and print it again as close as possible to the original.
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It's heavily inspired by format-preserving printer component in [nikic/PHP-Parser](https://github.com/nikic/PHP-Parser).
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```php
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<?php
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require_once __DIR__ . '/vendor/autoload.php';
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use PHPStan\PhpDocParser\Ast\NodeTraverser;
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use PHPStan\PhpDocParser\Ast\NodeVisitor\CloningVisitor;
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use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocNode;
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use PHPStan\PhpDocParser\Ast\Type\IdentifierTypeNode;
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use PHPStan\PhpDocParser\Lexer\Lexer;
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use PHPStan\PhpDocParser\Parser\ConstExprParser;
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use PHPStan\PhpDocParser\Parser\PhpDocParser;
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use PHPStan\PhpDocParser\Parser\TokenIterator;
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use PHPStan\PhpDocParser\Parser\TypeParser;
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use PHPStan\PhpDocParser\Printer\Printer;
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// basic setup with enabled required lexer attributes
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$usedAttributes = ['lines' => true, 'indexes' => true];
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$lexer = new Lexer();
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$constExprParser = new ConstExprParser(true, true, $usedAttributes);
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$typeParser = new TypeParser($constExprParser, true, $usedAttributes);
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$phpDocParser = new PhpDocParser($typeParser, $constExprParser, true, true, $usedAttributes);
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$tokens = new TokenIterator($lexer->tokenize('/** @param Lorem $a */'));
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$phpDocNode = $phpDocParser->parse($tokens); // PhpDocNode
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$cloningTraverser = new NodeTraverser([new CloningVisitor()]);
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/** @var PhpDocNode $newPhpDocNode */
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[$newPhpDocNode] = $cloningTraverser->traverse([$phpDocNode]);
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// change something in $newPhpDocNode
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$newPhpDocNode->getParamTagValues()[0]->type = new IdentifierTypeNode('Ipsum');
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// print changed PHPDoc
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$printer = new Printer();
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$newPhpDoc = $printer->printFormatPreserving($newPhpDocNode, $phpDocNode, $tokens);
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echo $newPhpDoc; // '/** @param Ipsum $a */'
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```
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## Code of Conduct
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This project adheres to a [Contributor Code of Conduct](CODE_OF_CONDUCT.md). By participating in this project and its community, you are expected to uphold this code.
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## Building
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Initially you need to run `composer install`, or `composer update` in case you aren't working in a folder which was built before.
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Afterwards you can either run the whole build including linting and coding standards using
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make
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or run only tests using
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make tests
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