rector/config/level/cakephp/cakephp34.yml

# source: https://book.cakephp.org/3.0/en/appendices/3-4-migration-guide.html

services:
    Rector\Rector\Property\PropertyToMethodRector:
        Cake\Network\Request:
            params:
                get:
                    method: 'getAttribute'
                    arguments: ['params']

            data:
                get: 'getData'
            query:
                get: 'getQueryParams'
            cookies:
                get: 'getCookie'
            base:
                get:
                    method: 'getAttribute'
                    arguments: ['base']
            webroot:
                get:
                    method: 'getAttribute'
                    arguments: ['webroot']
            here:
                get:
                    method: 'getAttribute'
                    arguments: ['here']

    Rector\Rector\Property\PropertyNameReplacerRector:
        Cake\Network\Request:
            _session: 'session'

    Rector\CakePHP\Rector\MethodCall\ModalToGetSetRector:
        Cake\Core\InstanceConfigTrait:
            config: ~
        Cake\Core\StaticConfigTrait:
            config: ~
            dsnClassMap: ~
        Cake\Console\ConsoleOptionParser:
            command: ~
            description: ~
            epilog: ~
        Cake\Database\Connection:
            driver: ~
            schemaCollection: ~
            useSavePoints:
                set: 'enableSavePoints'
                get: 'isSavePointsEnabled'
        Cake\Database\Driver:
            autoQuoting:
                set: 'enableAutoQuoting'
                get: 'isAutoQuotingEnabled'
        Cake\Database\Expression\FunctionExpression:
            name: ~
        Cake\Database\Expression\QueryExpression:
            tieWith:
                set: 'setConjunction'
                get: 'getConjunction'
        Cake\Database\Expression\ValuesExpression:
            columns: ~
            values: ~
            query: ~
        Cake\Database\Query:
            connection: ~
            selectTypeMap: ~
            bufferResults:
                set: 'enableBufferedResults'
                get: 'isBufferedResultsEnabled'
        Cake\Database\Schema\CachedCollection:
            cacheMetadata: ~
        Cake\Database\Schema\TableSchema:
            options: ~
            temporary:
                set: 'setTemporary'
                get: 'isTemporary'
        Cake\Database\TypeMap:
            defaults: ~
            types: ~
        Cake\Database\TypeMapTrait:
            typeMap: ~
            defaultTypes: ~
        Cake\ORM\Association:
            name: ~
            cascadeCallbacks: ~
            source: ~
            target: ~
            conditions: ~
            bindingKey: ~
            foreignKey: ~
            dependent: ~
            joinType: ~
            property: ~
            strategy: ~
            finder: ~
        Cake\ORM\Association\BelongsToMany:
            targetForeignKey: ~
            saveStrategy: ~
            conditions: ~
        Cake\ORM\Association\HasMany:
            saveStrategy: ~
            foreignKey: ~
            sort: ~
        Cake\ORM\Association\HasOne:
            foreignKey: ~
        Cake\ORM\EagerLoadable:
            config: ~
            canBeJoined:
                set: 'setCanBeJoined'
                get: 'canBeJoined'
        Cake\ORM\EagerLoader:
            matching:
                set: 'setMatching'
                get: 'getMatching'
                # note: will have to be called after setMatching() to keep the old behavior
                # ref: https://github.com/cakephp/cakephp/blob/4feee5463641e05c068b4d1d31dc5ee882b4240f/src/ORM/EagerLoader.php#L330
            autoFields:
                set: 'enableAutoFields'
                get: 'isAutoFieldsEnabled'
        Cake\ORM\Locator\TableLocator:
            config: ~
        Cake\ORM\Query:
            eagerLoader: ~
            hydrate:
                set: 'enableHydration'
                get: 'isHydrationEnabled'
            autoFields:
                set: 'enableAutoFields'
                get: 'isAutoFieldsEnabled'
        Cake\ORM\Table:
            table: ~
            alias: ~
            registryAlias: ~
            connection: ~
            schema: ~
            primaryKey: ~
            displayField: ~
            entityClass: ~
        Cake\Mailer\Email:
            from: ~
            sender: ~
            replyTo: ~
            readReceipt: ~
            returnPath: ~
            to: ~
            cc: ~
            bcc: ~
            charset: ~
            headerCharset: ~
            emailPattern: ~
            subject: ~
            # template: have to be changed manually, non A → B change + array case
            viewRender:
                set: 'setViewRenderer'
                get: 'getViewRenderer'
            viewVars: ~
            theme: ~
            helpers: ~
            emailFormat: ~
            transport: ~
            messageId: ~
            domain: ~
            attachments: ~
            configTransport: ~
            profile: ~
        Cake\Validation\Validator:
            provider: ~
        Cake\View\StringTemplateTrait:
            templates: ~
        Cake\View\ViewBuilder:
            templatePath: ~
            layoutPath: ~
            plugin: ~
            helpers: ~
            theme: ~
            template: ~
            layout: ~
            options: ~
            name: ~
            className: ~
            autoLayout:
                set: 'enableAutoLayout'
                get: 'isAutoLayoutEnabled'

    Rector\Rector\MethodCall\MethodNameReplacerRector:
        Cake\Network\Request:
            param: 'getParam'
            data: 'getData'
            query: 'getQuery'
            cookie: 'getCookie'
            method: 'getMethod'
            setInput: 'withBody'
        Cake\Network\Response:
            location: 'withLocation'
            disableCache: 'withDisabledCache'
            type: 'withType'
            charset: 'withCharset'
            cache: 'withCache'
            modified: 'withModified'
            expires: 'withExpires'
            sharable: 'withSharable'
            maxAge: 'withMaxAge'
            vary: 'withVary'
            etag: 'withEtag'
            compress: 'withCompression'
            length: 'withLength'
            mustRevalidate: 'withMustRevalidate'
            notModified: 'withNotModified'
            cookie: 'withCookie'
            file: 'withFile'
            download: 'withDownload'
            # psr-7
            header: 'getHeader'
            body: 'withBody'
            statusCode: 'getStatusCode'
            protocol: 'getProtocolVersion'
        Cake\Event\Event:
            'name': 'getName'
            'subject': 'getSubject'
            'result': 'getResult'
            'data': 'getData'
        Cake\View\Helper\FormHelper:
            input: 'control'
            inputs: 'controls'
            allInputs: 'allControls'
        Cake\Mailer\Mailer:
            layout: 'setLayout'
        Cake\Routing\Route\Route:
            parse: 'parseRequest'
        Cake\Routing\Router:
            parse: 'parseRequest'

    Rector\Rector\Visibility\ChangeMethodVisibilityRector:
        Cake\Mailer\MailerAwareTrait:
            getMailer: 'protected'
        Cake\View\CellTrait:
            cell: 'protected'

    Rector\Rector\Class_\ClassReplacerRector:
        Cake\Database\Schema\Table: 'Cake\Database\Schema\TableSchema'

    Rector\Rector\MethodBody\NormalToFluentRector:
        Cake\Network\Response:
            # https://book.cakephp.org/3.0/en/appendices/3-4-migration-guide.html#adopting-immutable-responses
            # renames are done by MethodNameReplacerRector above
            - 'withLocation'
            - 'withHeader'
            - 'withLocation'
            - 'withDisabledCache'
            - 'withType'
            - 'withCharset'
            - 'withCache'
            - 'withModified'
            - 'withExpires'
            - 'withSharable'
            - 'withMaxAge'
            - 'withVary'
            - 'withEtag'
            - 'withCompression'
            - 'withLength'
            - 'withMustRevalidate'
            - 'withNotModified'
            - 'withCookie'
            - 'withFile'
            - 'withDownload'

    # @todo
    # The fieldList option for Cake\ORM\Table::newEntity() and patchEntity() has been renamed to fields to be more consistent with other parts of the ORM.