PHP-Parser

PHP Parser
==========

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This is a PHP parser written in PHP. Its purpose is to simplify static code analysis and
manipulation.

[**Documentation for version 5.x**][doc_master] (current; for running on PHP >= 7.4; for parsing PHP 7.0 to PHP 8.4, with limited support for parsing PHP 5.x).

[Documentation for version 4.x][doc_4_x] (supported; for running on PHP >= 7.0; for parsing PHP 5.2 to PHP 8.3).

Features
--------

The main features provided by this library are:

 * Parsing PHP 7, and PHP 8 code into an abstract syntax tree (AST).
   * Invalid code can be parsed into a partial AST.
   * The AST contains accurate location information.
 * Dumping the AST in human-readable form.
 * Converting an AST back to PHP code.
   * Formatting can be preserved for partially changed ASTs.
 * Infrastructure to traverse and modify ASTs.
 * Resolution of namespaced names.
 * Evaluation of constant expressions.
 * Builders to simplify AST construction for code generation.
 * Converting an AST into JSON and back.

Quick Start
-----------

Install the library using [composer](https://getcomposer.org):

    php composer.phar require nikic/php-parser

Parse some PHP code into an AST and dump the result in human-readable form:

```php
<?php
use PhpParser\Error;
use PhpParser\NodeDumper;
use PhpParser\ParserFactory;

$code = <<<'CODE'
<?php

function test($foo)
{
    var_dump($foo);
}
CODE;

$parser = (new ParserFactory())->createForNewestSupportedVersion();
try {
    $ast = $parser->parse($code);
} catch (Error $error) {
    echo "Parse error: {$error->getMessage()}\n";
    return;
}

$dumper = new NodeDumper;
echo $dumper->dump($ast) . "\n";
```

This dumps an AST looking something like this:

```
array(
    0: Stmt_Function(
        attrGroups: array(
        )
        byRef: false
        name: Identifier(
            name: test
        )
        params: array(
            0: Param(
                attrGroups: array(
                )
                flags: 0
                type: null
                byRef: false
                variadic: false
                var: Expr_Variable(
                    name: foo
                )
                default: null
            )
        )
        returnType: null
        stmts: array(
            0: Stmt_Expression(
                expr: Expr_FuncCall(
                    name: Name(
                        name: var_dump
                    )
                    args: array(
                        0: Arg(
                            name: null
                            value: Expr_Variable(
                                name: foo
                            )
                            byRef: false
                            unpack: false
                        )
                    )
                )
            )
        )
    )
)
```

Let's traverse the A