Migration Guides
Migration guides contain information regarding the new features introduced in each version and the migration path between major and minor releases.
Upgrade Tool
CakePHP provides an upgrade tool that automates many code changes using Rector. The tool has rulesets for each minor version to help automate tedious code changes like method renames and signature updates.
To use the upgrade tool:
bash
# Install the upgrade tool
git clone https://github.com/cakephp/upgrade
cd upgrade
git checkout 6.x
composer install --no-dev
# Run rector with the desired ruleset
bin/cake upgrade rector --rules cakephp60 <path/to/app/src>Run rector before updating your composer.json dependencies to ensure the tool can resolve class names correctly.