Here I am going to explain how to use AJAX with CodeIgniter 4 and MySQL to check the availability of username on key event. So instead of user waiting at the end of the input form and submitting the form, I am going to let user know immediately whether the username he/she is choosing is…

Posted in Codeigniter

AJAX Example with CodeIgniter 4 and MySQL – Check Username Availability

Here in this tutorial I am going to tell you how to configure Persistence Unit for JPA (Java Persistence API). Here I am going to show you both XML and Java based configurations for persistence unit in JPA. This is a pure Java application and I am not using Spring framework for this example. A…

Posted in JPA

Java and XML based JPA Persistence Unit Configurations

Here I am going to discuss how to display date time in different formats using Python programming language. Python datetime module supplies classes for manipulating dates and times. Date and time objects may be categorized as “aware” or “naive” depending on whether or not they include timezone information. An aware object, such as time zone…

Posted in Python

How to display Date Time in Different Formats in Python

Here in this example I am going to show you how to allow users for OAuth2 SSO (Single Sign On) using AWS (Amazon Web Services) Cognito. I had explained how to do OAuth2 Single Sign On using Spring Boot and GitHub account. Here I am going to use AWS Cognito. You can use any other…

Posted in AWS Spring Boot Spring REST Spring Security

Spring Boot OAuth2 SSO Example with AWS Cognito

In this tutorial I will show you how to upload single and multiple files using PHP based CodeIgniter framework 4. In many enterprise applications files upload is an important task for various purposes. CodeIgniter makes working with files uploaded through a form much simpler and more secure than using PHP’s $_FILES array directly. This extends…

Posted in Codeigniter File Upload

CodeIgniter 4 Single and Multiple Files Upload Examples

In this example I am going to show you how to check if an input date is past date or today’s date or future date. I am using Java version 12 and for this example you should use at least Java version 8. Java 8 or higher version provides thread safe version of date time…

Posted in Java

Check a Given Date is Past, Today or Future’s Date in Java 8

This example will show you how to delete or eliminate duplicate records from a table in database. Keeping duplicate records in a table is unnecessary and it also grows the size of database unnecessary. Removing duplicate records from the table will free the occupied space and enhance also the performance of the query execution. Let’s…

Posted in Database MySQL

How to delete Duplicate Records from MySQL Table

In this tutorial I am going to show you how to validate form in CodeIgniter 4 framework. CodeIgniter 4 is a PHP based web framework makes your life easier to build the web application quickly right from the scratch. CodeIgniter 4 is still under development and it is supposed to be supported with PHP version…

Posted in Codeigniter

CodeIgniter 4 Form Validation Example

In this example I am going to show you how to create and work with custom config file in CodeIgniter 4 framework. A PHP based CodeIgniter 4 framework is the new and future version of the CodeIgniter framework and currently version 4 is still under development. Config file is generally used to declare different configurations…

Posted in Codeigniter

How to create Custom Config File in CodeIgniter 4

Here I am going to show you how to convert JSON into CSV using PHP programming language. I will show you both on how to convert JSON string or JSON file to CSV string or file. In my previous example I had shown you how to convert CSV to JSON in PHP. JSON is an…

Posted in PHP

How to convert JSON to CSV in PHP

In this tutorial I am going to show you how to sort MySQL table data in ascending or descending order to display them on HTML table on user interface (UI) using Codeigniter 4. I had also shown similar example using CodeIgniter 3. So when a user wants to see the data on UI either in…

Posted in Codeigniter MySQL

Sort MySQL Table Data in Ascending or Descending Order in CodeIgniter 4

Here I am going to show you how to return different response formats (content negotiation) from Flask REST API. The default response format you receive from the REST API is JSON (JavaScript Object Notation). Now for some requirements you may need to return XML format from your REST API. Then this example may help you…

Posted in Flask

How to return Different Response Formats (JSON, XML) in Flask REST API