PHP Parser written in Go

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

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.

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)
}

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.