To secure your database from inconsistencies resulting from failing (complex) operations, you (should) use transactions. However, complex methods often rely on other complex methods that themselves build on transactions. This HowTo presents a method to nest or embed transactions without relying on the database's nesting capabilities.

Example settings when using Gettext for i18n.

Here is a example on how to use Pjax with GridView (yii\grid\GridView) and ActiveForm (yii\widgets\ActiveForm) widgets in Yii2.

One of the common requests I see in the forum is how to implement RBAC. While you can implement Yii 2's built-in RBAC, that might be too much for developers who are just starting with Yii 2 or have simpler needs. Sometimes you are looking for a fast solution and just want two flavors, user and admin. And even if you will eventually need more, you can use these methods as a starting point for devel...

yii rights some tips..

Does your application need to know user's details on browser details, os and device type? We can use PHP's misc. function to achieve that provided you have an update copy of browsercap.ini

Modern browsers support SVG, older browsers do not. This replacement for CHtml::image() allows you to handle to propose SVG in an efficient way with PNG as a fallback.

This is as an extension of this wiki by Kartik V which shows to make different enableAutoLogin cookies for frontend and backend.

First of all, install yii2 basic template according below link:

I have two tables called hospitals and departments. I have a junction table between them which holds the departments in each hospital. But sometimes I need a list of "All hospitals with All possible departments" - regardless of whether they are linked in the junction table or not.

There are cases that model validators should be depended by controller/action and you couldn't manipulate on the model class or using scenarios in easy way

We will leverage Yii2-excelview widget. So, first of all is install Yii2-excelview:

This tutorial need extension mdmsoft/yii2-upload-file. Follow the intruction to install. After installation done, create controller and action

This is an extension to Yii 2.0: Write & use a custom Component in Yii2.0 for Advanced Template

In yii2 we can create form without create FormModel. Here we go

It is difficult to perform user dependent theming through a general configuration in 'main.php'. This article proposes a method to do so through a Factory that dynamically generates classes to allow delayed resolution of actual user values. This means that you can refer to values that are stored in the database through the CActiveRecord before Yii is actually loaded. The values will be fetched...

Imagine adds most common image functions and also acts as a wrapper to Imagine image manipulation library.

I wanted to customize the CJuiAutoComplete, so that it displays a thumb image before the label like the one shown in the following image:

There is an issue on Yii2 to redirecting / urls to /frontend/web.
In other words we need a way to hidden /frontend/web from addresses.
We will do this without changing Apache configuration and creating virtual host or setting document root (It's good for share hostings that we have not access to apache.conf)

Here's a possible implementation for MongoDb of the RBAC standard. Create a class "MongoDbManager" in `common\components and modify your params.php` file like this: