How to upgrade

• 2654 - RouteParser::pathFor() and RouteParser::relativePathFor() are deprecated. Use RouteParser::urlFor() and RouteParser::relativeUrlFor()
• 2638 - RouteCollector::pathFor() is now deprecated. Use RouteParser::urlFor()
• 2622 - Router has been removed. It is now split into RouteCollector, RouteRunner and RouteParser
• 2555 - PSR-15 Middleware support was implemented at the cost of Double-Pass middleware being deprecated.
• 2529 - Slim no longer ships with its own PSR-7 implementation you will need to provide your own before you can create/run an app.
• 2507 - Method names are now case sensitive when using App::map().
• 2404 - Slim 4 requires PHP 7.1 or higher
• 2398 - Error handling was extracted into its own middleware. Add RoutingMiddleware to your middleware pipeline to handle errors by default. See PR for more information.
• 2329 - If you were overriding the HTTP method using either the custom header or the body param, you need to add the Middleware\MethodOverrideMiddleware middleware to be able to override the method like before.
• 2290 - Slim no longer ships with Pimple as container dependency so you need to supply your own. App::__call() has been deprecated.
• 2288 - If you were using determineRouteBeforeAppMiddleware, you need to add the Middleware\RoutingMiddleware middleware to your application just before your call run() to maintain the previous behaviour.
• 2254 - You need to add the Middleware\ContentLengthMiddleware middleware if you want Slim to add the Content-Length header this automatically.
• 2166 - You need to add the Middleware\OutputBuffering middleware to capture echo'd or var_dump'd output from your code.