How to Use Data Models in php to Add, Update, Delete or Select from database...?

[Bhagirath]

I have a web site that i develop in core php without using Classes and functions.
After adding more and more files and code in my web site as per client requirements, My web site becomes very large.

Now its difficult to handle all the code and full web site.

I just want not to write all database queries in my php file but i want to create data models for that. so i can use them in my display file (Front End or view) or process(back end file)

thanks in advance...