结合PHP和Jquery的最佳实践是什么？

I am building a MySQL/PHP ticketing system application for a fairly big company which will possibly have between 1000-2000 users. This is my first real enterprise application and so I really want to make sure I do things properly based on best practices. I am not what you would call a seasoned developer. I know how to write code and make it work but i've never had a mentor or anyone to correct my work so I have no idea if the way I do things is good or bad... or even ass backwards. I am building a MySQL/PHP ticketing system appl