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A dropdown list can be used to select a value, based on which we can filter the data to be displayed. For example, the extension page has a dropdown list to filter the displayed extensions according to the selected category.

There are many ways to automate the setting of timestamps in yii ActiveRecord models. Three are presented here:

A simple and effective way to keep track what your users are doing within your application is to log their activities related to database modifications. You can log whenever a record was inserted, changed or deleted, and also when and by which user this was done. For a [CActiveRecord] Model you could use a behavior for this purpose. This way you will be able to add log functionality to ActiveRecor...

Here is a way to dynamically extend tabs based on clips.
Probably even more complex things could be done.

Some PHP installations may use a different php.ini file for CLI PHP (command line PHP parser). As a result, when running the model or crud command in yiic shell, you may encounter errors like "YiiBase::include(PDO.php): failed to open stream..." or "...could not find driver", even though the requirement checker confirms you have PDO and the corresponding database driver.

By default, the expression Yii::app()->user returns a [CWebUser] [application component](http://www.yiiframework.com/doc/guide/basics.application#application-component) which represents the information that are closely related with the current user. Some information can be persistent throughout the current user session. For example, [CWebUser] already comes with a [name|CWebUser::name] property th...

Once you are completed with the "Creating First Yii Application", the following can be done.

Next to do is to download the Yii FCKeditor extension, created by Ascomae. Extract the downloaded file, and place the fckeditor/ widget folder in your web applications protected/extensions/ directory.

This page assumes that you have installed Wampserver on your MS Windows computer.

First declare an attribute to store the file name in the model class (either a form model or an active record model). Also declare a file validation rule for this attribute to ensure a file is uploaded with specific extension name.

Validators extending from [CValidator] all have a property named [message|CValidator::message]. You can set this property in the corresponding validation rule to customize the error message. For example, the following validation rule uses an error message that is different from the default one: