How to export database data into excel in csv format using PHP
Already created database data export is a familiar operation inside phpMyAdmin We have to go phpMyAdmin for a database client in PHP. It provides database administration tools and also allows exporting the data. The exported data can be in various formats like SQL, CSV as selected.
When we want to export data manually then we need a PHP script, that can export database data (records) to an excel file, then this article will help you. It has detailed step by step description with example code.
We have already seen several example tutorial online for implementing database export using PHP. Here we implement simple header for doing this.
What is inside:

First, we are going to create a database named bootstrapfriendly and then create a table named tbl_animal and insert some data to its better understanding.
Now, we need to creat a connection file for making connectivity with database
Now we are going to creat a index page where we will fetch data inside a table with export to excel button
index.php
Now we are going to create a process action php script which will convert database data into CSV format
Here we use a simple header function to do this process
excel_action.php