A Database is required to support an Online school system which should be so generic that any number of schools in an area, (eg Town/country/world) can register to use the System.
When run application on your computer, the computer know who you are, what are you doing, what data you alter, when you close your application and so forth, this is called session. In web communication we use Hyper Text Transfer Protocol (HTTP), which is a stateless protocol that does not retain information on server and treat all request as independent request. To make it remember user information we use SESSION.
Generating PDF from HTML using PHP is fairly simple and easy using HTML2FPDF. Lets get straight to point, who has time to read and "write" the obvious stuff.
In this tutorial we will delete a Row from database using Doctrine, lets do it with a simple example.
Converting to object oriented can be sometimes difficult as people are not used to it... same is the case with ORM, when you use it there may be some problems for the new comers.