Module development and code questions

I have been trying to develop a website and I need some help with it, it should take no longer than 30 minutes. my email is guptaru1@msu.edu, I would appreciate it if anyone could help me,  thank you!

I search to use a hook to get all HTML content to replace certain occurrences on code.

I want use `DOMDocument()` to modify some elements.

My actual hook but I can't get all page HTML...

I'm starting the process to migrate my custom modules to D9. Some things are easy, like replacing drupal_set_message(). This one is throwing me. My controller class is instantiating a database connection to a custom table and building a select query.

This works in 8.9.13

Hi,

I am not much familiar with drupal. We have a drupal 7 site homepage that uses content from page--front.tpl template file.

I have a request to quickly update the text. I dont want to update it in file as it involves change request process from dev -test to prod.

I tried creating a basic page and set it to frontpage in site admin. But didnt work.

Is there way I can quickly override the content without updating the file system?

Thanks
Gane

Hello,

good day..currently I'm facing some problems in my Drupal website.I have few videos in my Flexslider and what I would like to do is that I want to stop the first video when user change to the next video in the flexslider.Is there any function for my issue?Thanks in advance.I've tried this http://flexslider.woothemes.com/video.html but still its not working.

I am trying to send data to a wordpress REST api, but keep getting Unauthorized errors. 

If I use my keys in Postman I am getting access without any problems. So it must have something to do with the code in my Drupal module.

Here's my code: