php-parser/README.md
2019-03-06 10:36:48 +02:00

3.1 KiB

PHP Parser written in Go

PHP Parser written in Go

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This project uses goyacc and golex libraries to parse PHP sources into AST. It can be used to write static analysis, refactoring, metrics, code style formatting tools.

Try it online: demo

Features:

  • Fully support PHP 5 and PHP 7 syntax
  • Abstract syntax tree (AST) representation
  • Traversing AST
  • Resolving namespaced names
  • Parsing syntax-invalid PHP files
  • Saving and printing free-floating comments and whitespaces

Who Uses

VKCOM/noverify - NoVerify is a pretty fast linter for PHP

Usage example

package main

import (
	"fmt"
	"bytes"
	"os"

	"github.com/z7zmey/php-parser/php7"
	"github.com/z7zmey/php-parser/visitor"
)

func main() {
	src := bytes.NewBufferString(`<? echo "Hello world";`)

	parser := php7.NewParser(src, "example.php")
	parser.Parse()

	for _, e := range parser.GetErrors() {
		fmt.Println(e)
	}

	visitor := visitor.Dumper{
		Writer:    os.Stdout,
		Indent:    "",
		Comments:  parser.GetComments(),
		Positions: parser.GetPositions(),
	}

	rootNode := parser.GetRootNode()
	rootNode.Walk(visitor)
}

Roadmap

  • Control Flow Graph (CFG)
  • PhpDocComment parser
  • Stabilize api

Install

go get github.com/z7zmey/php-parser

CLI

php-parser [flags] <path> ...
flag type description
-d string dump format: [custom, go, json, pretty-json]
-r bool resolve names
-ff bool parse and show free floating strings
-prof string start profiler: [cpu, mem, trace]
-php5 bool parse as PHP5

Dump AST to stdout.

Namespace resolver

Namespace resolver is a visitor that resolves nodes fully qualified name and saves into map[node.Node]string structure

  • For Class, Interface, Trait, Function, Constant nodes it saves name with current namespace.
  • For Name, Relative, FullyQualified nodes it resolves use aliases and saves a fully qualified name.