Wiki articles in category How-tos

The yii2-datecontrol extension allows you to control separate date formats for display and saving for form inputs.

Your need: You require that for shared machines, the user is authenticated again for a backend access again, if someone is logged in from frontend and vice versa.

You would find having such a need in most Yii Projects. Your database needs a specific format to store date fields, while you may want to display it in different formats to the users on forms and other views.

This is for folks who are using \kartik\widgets\FileInput to upload files from your client. How do you display an image for update after you have uploaded it to the server using the widget?

In Yii 1.x, there was a built in widget CStarRating based on the jquery star rating plugin. There exists no prebuilt solution in Yii2, however the same concepts can be extended using any jquery plugin.

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With the adoption of PJax on Yii2 things  have change quite a bit with GridView when it comes to work with them in AJAX mode. It will probably be confusing at the beginning, but then you will soon realize how powerful the new approach is.

If you started playing with Yii2's new GridView, you will soon realize that some things have improved quite a lot, but I am sure its going to be a bit confusing at first glance when you try to modify certain javascript behaviors like for example, its delete confirmation dialog box.

One of the things you will find tricky to implement is the the sorting and filtering of a GridView's column that displays related model data.

Yii2 introduces the BootstrapInterface to ease our application initialization tasks, whether they are composer based or Application bootstrap (do not mistaken with Bootstrap CSS Framework) based tasks. On this article, I am going to explain how to use it on y...

In advance template there is already a file yii. And there is no need to run it as php, it is Linux script.

suppose to have in Mongo a collection "user" like:

An example of customizing the Yii GridView is mentioned here. You can easily override Bootstrap or other styling defaults by changing the GridView default options.

Uploading files in a webapp can be extremely tricky and sometimes the quickest way to do it is to store the file directly in the webserver or into a DNS (like Amazon S3) and then to save the link and the metadata inside a table in the DB. The thing is that you'll have to deal with file permissions, server storage, file management and so on (which is perfectly fine, by the way).

I wrote about this on my blog, but wanted to post it here too.

The problem was that all my web applications ran normally on localhost, but on server the Greek characters (or any other no-english characters) displayed with problems.

I needed to use a class from ZF2 in my Yii project. I've read probably all there is about this subject and still I needed lots of trial & errors to get it working, probably due to my lack of experience working with namepsaces and ZF2 in general. Also, the resources on the web are all partial, at best. Most simply refer to ZF1 where things are technically different. When I got it all working I de...

A short explication on how to extract profile information for PHP on your server using XDebug and KCacheGrind or WinCacheGrind.