Category: Yii

Yii provides a set of widgets for displaying data. You can use the DetailView widget to display a single record. The ListView widget, as well as Grid View, can be used to display a table of records with features like filtering, sorting, and pagination. Preparing the DB Step 1 − Create a new database. Database can…

Yii provides a set of data provider classes that encapsulate pagination and sorting. A data provider implements yii\data\DataProviderInterface. It supports retrieving sorted and paginated data. Data providers usually work with data widgets. Yii includes − You define the sorting and pagination behaviors of a data-provider by configuring its pagination and sort properties. Data widgets, such as yii\grid\GridView, have a property…

Class member variables in PHP are also called properties. They represent the state of class instance. Yii introduces a class called yii\base\Object. It supports defining properties via getter or setter class methods. A getter method starts with the word get. A setter method starts with set. You can use properties defined by getters and setters like class member variables. When a property is…

When displaying lots of data, we often need to sort the data. Yii uses an yii\data\Sort object to represent a sorting schema. To show sorting in action, we need data. Preparing the DB Step 1 − Create a new database. Database can be prepared in the following two ways. Step 2 − Configure the database connection in the config/db.php file. The…

When you have too much data to display on a single page, you should display it on multiple pages. This is also known as pagination. To show pagination in action, we need data. Preparing the DB Step 1 − Create a new database. Database can be prepared in the following two ways. Step 2 − Configure the…

To display data in a readable format, you can use the formatter application component. Step1 − Add the actionFormatter method to the SiteController. In the above code, we just render the formatter view. Step 2 − Now, create a formatter.php view file inside the views/site folder. Step 3 − Go to http://localhost:8080/index.php?r=site/formatter, you will see the following output. The formatter component supports the following formats related with date and time −…

You can easily implement a file uploading function with the help of yii\web\UploadedFile, models and yii\widgets\ActiveForm. Create a directory ‘uploads’ in the root folder. This directory will hold all of the uploaded images. To upload a single file, you need to create a model and an attribute of the model for uploaded file instance. You should also validate the file…

Cookies allow data to be persisted across requests. In PHP, you may access them through the $_COOKIE variable. Yii represents cookie as an object of the yii\web\Cookie class. In this chapter, we describe several methods for reading cookies. Step 1 − Create an actionReadCookies method in the SiteController. Step 2 − To see sending cookies in action, create a method called actionSendCookies in the SiteController. Step 3 −…

Cookies are plain text files stored on the client side. You can use them for tracking purpose. There are three steps to identify a returning user − Cookies are usually set in an HTTP header as shown in the following code. PHP provides the setcookie() function to set cookies − where − To access cookies in PHP,…

Yii provides a concept of flash data. Flash data is a session data which − Step 1 − Add an actionShowFlash method to the SiteController. Step 2 − Inside the views/site folder, create a View file called showflash.php. Step 3 − When you type http://localhost:8080/index.php?r=site/show-flash in the address bar of the web browser, you will see the following. Yii also provides the following session…