HI, I am facing problem while accessing data form mysql using foreach loop in php

I want to get each post, but due to this error:

Fatal error: Uncaught TypeError: Cannot access offset of type string on string in C:\xampp\htdocs\php_dev\blogPost\index.php:36 Stack trace: #0 {main} thrown in C:\xampp\htdocs\php_dev\blogPost\index.php on line 36.

I am just getting the first post when looping.

In PHP, I use the foreach loop. Kindly respond to me. Thanks.