PHP-Parser/UPGRADE-3.0.md

Upgrading from PHP-Parser 2.x to 3.0

This version does not include any major API changes. Only specific details of the node representation have changed in some cases.

PHP version requirements

PHP-Parser now requires PHP 5.5 or newer to run. It is however still possible to parse PHP 5.2, 5.3 and 5.4 source code, while running on a newer version.

Changes to the node structure

The following changes are likely to require code changes if the respective nodes are used:

• The List subnode vars has been renamed to items and now contains ArrayItems instead of plain variables.
• The Catch subnode type has been renamed to types and is now an array of Names.
• The TryCatch subnode finallyStmts has been replaced with a finally subnode that holds an explicit Finally node.
• The type subnode on Class, ClassMethod and Property has been renamed to flags. The type subnode has retained for backwards compatibility and is populated to the same value as flags. However, writes to type will not update flags and use of type is discouraged.

The following changes are unlikely to require code changes:

• The ClassConst constructor changed to accept an additional flags subnode.
• The Trait constructor now has the same form as the Class and Interface constructors: It takes an array of subnodes. Unlike classes/interfaces, traits can only have a stmts subnode.
• The Array subnode items may now contain null elements (due to destructuring).
• void and iterable types are now stored as strings if the PHP 7 parser is used. Previously these would have been represented as Name instances.

Removed methods

The following methods have been removed:

• Comment::setLine(), Comment::setText(): Create new Comment instances instead.
• Name::set(), Name::setFirst(), Name::setLast(): Create new Name instances instead. For the latter two a combination of Name::concat() and Name::slice() can be used.

Miscellaneous

• All methods on PrettyPrinter\Standard are now protected. Previoulsy most of them were public. The pretty printer should only be invoked using the prettyPrint(), prettyPrintFile() and prettyPrintExpr() methods.
• The node dumper now prints numeric values that act as enums/flags in a string representation. If node dumper results are used in tests, updates may be needed to account for this.