Codeigniter Get Date Example

You can use the following code to get the current date time in CI - https://www.tutorialsplane.com/how-to-get-current-date-time-in-codeigniter/

How to create Ionic Popup

You can create Popups in Ionic simply following this link - https://www.tutorialsplane.com/ionic-popup/

Material UI change font size

You can change font simply as below-
https://www.tutorialsplane.com/material-ui-change-fornt-size/

Magento 2 left join collection

You can use factory method for left joining the collections here is complete example - https://www.tutorialsplane.com/magento-2-left-join-collection-query/