관리-도구

편집 파일: UPGRADE-2.0.md

Upgrading from PHP-Parser 1.x to 2.0 ==================================== ### PHP version requirements PHP-Parser now requires PHP 5.4 or newer to run. It is however still possible to *parse* PHP 5.2 and PHP 5.3 source code, while running on a newer version. ### Creating a parser instance Parser instances should now be created through the `ParserFactory`. Old direct instantiation code will not work, because the parser class was renamed. Old: ```php use PhpParser\Parser, PhpParser\Lexer; $parser = new Parser(new Lexer\Emulative); ``` New: ```php use PhpParser\ParserFactory; $parser = (new ParserFactory)->create(ParserFactory::PREFER_PHP7); ``` The first argument to `ParserFactory` determines how different PHP versions are handled. The possible values are: * `ParserFactory::PREFER_PHP7`: Try to parse code as PHP 7. If this fails, try to parse it as PHP 5. * `ParserFactory::PREFER_PHP5`: Try to parse code as PHP 5. If this fails, try to parse it as PHP 7. * `ParserFactory::ONLY_PHP7`: Parse code as PHP 7. * `ParserFactory::ONLY_PHP5`: Parse code as PHP 5. For most practical purposes the difference between `PREFER_PHP7` and `PREFER_PHP5` is mainly whether a scalar type hint like `string` will be stored as `'string'` (PHP 7) or as `new Name('string')` (PHP 5). To use a custom lexer, pass it as the second argument to the `create()` method: ```php use PhpParser\ParserFactory; $lexer = new MyLexer; $parser = (new ParserFactory)->create(ParserFactory::PREFER_PHP7, $lexer); ``` ### Rename of the `PhpParser\Parser` class `PhpParser\Parser` is now an interface, which is implemented by `Parser\Php5`, `Parser\Php7` and `Parser\Multiple`. Parser tokens are now defined in `Parser\Tokens`. If you use the `ParserFactory` described above to create your parser instance, these changes should have no further impact on you. ### Removal of legacy aliases All legacy aliases for classes have been removed. This includes the old non-namespaced `PHPParser_` classes, as well as the classes that had to be renamed for PHP 7 support. ### Deprecations The `set()`, `setFirst()`, `append()` and `prepend()` methods of the `Node\Name` class have been deprecated. Instead `Name::concat()` and `Name->slice()` should be used. ### Miscellaneous * The `NodeTraverser` no longer clones nodes by default. If you want to restore the old behavior, pass `true` to the constructor. * The legacy node format has been removed. If you use custom nodes, they are now expected to implement a `getSubNodeNames()` method. * The default value for `Scalar` node constructors was removed. This means that something like `new LNumber()` should be replaced by `new LNumber(0)`. * String parts of encapsed strings are now represented using `Scalar\EncapsStringPart` nodes, while previously raw strings were used. This affects the `parts` child of `Scalar\Encaps` and `Expr\ShellExec`.