Upgrading from 4.1.4 to 4.1.5

Breaking Changes

Changes for set() method in BaseBuilder and Model class

The casting for the $value parameter has been removed to fix a bug where passing parameters as array and string to the set() method were handled differently. If you extended the BaseBuilder class or Model class yourself and modified the set() method, then you need to change its definition from public function set($key, ?string $value = '', ?bool $escape = null) to public function set($key, $value = '', ?bool $escape = null).

Session DatabaseHandler’s database table change

The types of the following columns in the session table have been changed for optimization.

  • MySQL
    • timestamp
  • PostgreSQL
    • ip_address
    • timestamp
    • data

Update the definition of the session table. See the Session Library for the new definition.

The change was introduced in v4.1.2. But due to a bug, the DatabaseHandler Driver did not work properly.

CSRF Protection

Because of a bug fix, now CSRF protection works on not only POST but also PUT/PATCH/DELETE requests when CSRF filter is applied.

When you use PUT/PATCH/DELETE requests, you need to send CSRF token. Or remove the CSRF filter for such requests if you don’t need CSRF protection for them.

If you want the same behavior as the previous version, set the CSRF filter like the following in app/Config/Filters.php:

public $methods = [
    'get'  => ['csrf'],
    'post' => ['csrf'],

Protecting GET method needs only when you use form_open() auto-generation of CSRF field.

CURLRequest header change

In the previous version, if you didn’t provide your own headers, CURLRequest would send the request-headers from the browser. The bug was fixed. If your requests depend on the headers, your requests might fail after upgrading. In this case, add the necessary headers manually. See CURLRequest Class for how to add.

Query Builder changes

For optimization and a bug fix, the following behaviors, mostly used in testing, have been changed.

  • When you use insertBatch() and updateBatch(), the return value of $query->getOriginalQuery() has changed. It no longer returns the query with the binded parameters, but the actual query that was run.
  • If testMode is true, insertBatch() will return an SQL string array instead of the number of affected rows. This change was made so that the returned data type is the same as the updateBatch() method.

Breaking Enhancements

Multiple filters for a route

A new feature to set multiple filters for a route.


This feature is disabled by default. Because it breaks backward compatibility.

If you want to use this, you need to set the property $multipleFilters true in app/Config/Feature.php. If you enable it:

  • CodeIgniter\CodeIgniter::handleRequest() uses
    • CodeIgniter\Filters\Filters::enableFilters(), instead of enableFilter()
  • CodeIgniter\CodeIgniter::tryToRouteIt() uses
    • CodeIgniter\Router\Router::getFilters(), instead of getFilter()
  • CodeIgniter\Router\Router::handle() uses
    • the property $filtersInfo, instead of $filterInfo
    • CodeIgniter\Router\RouteCollection::getFiltersForRoute(), instead of getFilterForRoute()

If you extended the above classes, then you need to change them.

The following methods and a property have been deprecated:

  • CodeIgniter\Filters\Filters::enableFilter()
  • CodeIgniter\Router\Router::getFilter()
  • CodeIgniter\Router\RouteCollection::getFilterForRoute()
  • CodeIgniter\Router\RouteCollection’s property $filterInfo

See Applying Filters for the functionality.

Project Files

Numerous files in the project space (root, app, public, writable) received updates. Due to these files being outside of the system scope they will not be changed without your intervention. There are some third-party CodeIgniter modules available to assist with merging changes to the project space: Explore on Packagist.


Except in very rare cases for bug fixes, no changes made to files for the project space will break your application. All changes noted here are optional until the next major version, and any mandatory changes will be covered in the sections above.

Content Changes

The following files received significant changes (including deprecations or visual adjustments) and it is recommended that you merge the updated versions with your application:

  • app/Config/CURLRequest.php
  • app/Config/Cache.php
  • app/Config/Feature.php
  • app/Config/Generators.php
  • app/Config/Publisher.php
  • app/Config/Security.php
  • app/Views/welcome_message.php

All Changes

This is a list of all files in the project space that received changes; many will be simple comments or formatting that have no effect on the runtime:

  • app/Config/CURLRequest.php
  • app/Config/Cache.php
  • app/Config/Feature.php
  • app/Config/Generators.php
  • app/Config/Kint.php
  • app/Config/Publisher.php
  • app/Config/Security.php
  • app/Views/welcome_message.php