See UPGRADE-5.0 for detailed migration instructions.

Added

• [PHP 8.3] Added support for typed constants.
• [PHP 8.3] Added support for readonly anonymous classes.
• Added support for NodeVisitor::REPLACE_WITH_NULL.
• Added support for CRLF newlines in the pretty printer, using the new newline option.

Changed

• Use PHP 7.1 as the default target version for the pretty printer.
• Print else if { } instead of else { if { } }.
• The leaveNode() method on visitors is now invoked in reverse order of enterNode().
• Moved NodeTraverser::REMOVE_NODE etc. to NodeVisitor::REMOVE_NODE. The old constants are still available for compatibility.
• The Name subnode parts has been replaced by name, which stores the name as a string rather than an array of parts separated by namespace separators. The getParts() method returns the old representation.
• No longer accept strings for types in Node constructors. Instead, either an Identifier, Name or ComplexType must be passed.
• Comment::getReformattedText() now normalizes CRLF newlines to LF newlines.

Fixed

• Don't trim leading whitespace in formatting preserving printer.
• Treat DEL as a label character in the formatting preserving printer depending on the targeted PHP version.
• Fix error reporting in emulative lexer without explicitly specified error handler.
• Gracefully handle non-contiguous array indices in the Differ.