118 lines
3.6 KiB
Markdown
118 lines
3.6 KiB
Markdown
> This is a fork of the [z7zmey](https://github.com/z7zmey) [parser](https://github.com/z7zmey/php-parser) that adds PHP 8 support.
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PHP Parser written in Go
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========================
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<img src="./parser.jpg" alt="PHP Parser written in Go" width="980"/>
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[](https://godoc.org/github.com/VKCOM/php-parser)
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[](https://github.com/VKCOM/php-parser/workflows/Go)
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[](https://goreportcard.com/report/github.com/VKCOM/php-parser)
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This project uses [goyacc](https://godoc.org/golang.org/x/tools/cmd/goyacc) and [ragel](https://www.colm.net/open-source/ragel/) tools to create PHP parser. It parses source code into [AST](https://en.wikipedia.org/wiki/Abstract_syntax_tree). It can be used to write static analysis, refactoring, metrics, code style formatting tools.
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Features
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---------
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- Fully support PHP 5, PHP 7 and PHP 8.0-8.2 syntax
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- Abstract syntax tree (AST) representation
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- Traversing AST
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- Resolving namespace names
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- Parsing syntax-invalid PHP files
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- Saving and printing free-floating comments and whitespaces
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Who Uses
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--------
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- [VKCOM/noverify](https://github.com/VKCOM/noverify) — pretty fast linter for PHP
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- [VKCOM/nocolor](https://github.com/VKCOM/nocolor) — architecture validation tool for PHP based on the [*concept of colored functions*](https://github.com/VKCOM/nocolor/blob/master/docs/introducing_colors.md)
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- [quasilyte/phpgrep](https://github.com/quasilyte/phpgrep) — tool for syntax-aware PHP code search
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Usage example
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-------
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```Golang
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package main
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import (
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"log"
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"os"
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"github.com/VKCOM/php-parser/pkg/conf"
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"github.com/VKCOM/php-parser/pkg/errors"
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"github.com/VKCOM/php-parser/pkg/parser"
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"github.com/VKCOM/php-parser/pkg/version"
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"github.com/VKCOM/php-parser/pkg/visitor/dumper"
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)
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func main() {
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src := []byte(`<?php echo "Hello world";`)
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// Error handler
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var parserErrors []*errors.Error
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errorHandler := func(e *errors.Error) {
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parserErrors = append(parserErrors, e)
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}
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// Parse
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rootNode, err := parser.Parse(src, conf.Config{
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Version: &version.Version{Major: 8, Minor: 0},
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ErrorHandlerFunc: errorHandler,
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})
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if err != nil {
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log.Fatal("Error:" + err.Error())
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}
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if len(parserErrors) > 0 {
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for _, e := range parserErrors {
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log.Println(e.String())
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}
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os.Exit(1)
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}
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// Dump
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goDumper := dumper.NewDumper(os.Stdout).
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WithTokens().
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WithPositions()
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rootNode.Accept(goDumper)
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}
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```
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Install
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-------
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```
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go get github.com/VKCOM/php-parser/cmd/php-parser
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```
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CLI
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---
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```
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php-parser [flags] <path> ...
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```
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| flag | type | description |
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|------------|----------|-------------------------------------|
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| `-p` | `bool` | Print file paths |
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| `-e` | `bool` | Print errors |
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| `-d` | `bool` | Dump AST in Golang format |
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| `-r` | `bool` | Resolve names |
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| `--pb` | `bool` | Print AST back into the parsed file |
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| `--time` | `bool` | Print execution time |
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| `--prof` | `string` | Start profiler: `[cpu, mem, trace]` |
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| `--phpver` | `string` | PHP version (default: 8.0) |
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Namespace resolver
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------------------
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Namespace resolver is a visitor that resolves nodes fully qualified name and saves into `map[node.Node]string` structure
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- For `Class`, `Interface`, `Trait`, `Function`, `Constant` nodes it saves name with current namespace.
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- For `Name`, `Relative`, `FullyQualified` nodes it resolves `use` aliases and saves a fully qualified name.
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