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11.17.04
Generate HTML Files With PHP To Reduce The Server Load
By Bobby Handzhiev
PIM Team Case Study
How can you have a site with tons of visitors without to crash the
server?
Problem
PIM Team Bulgaria had the task to create a quiz site able to hold an extreme server load.
The site is currently installed as beta version at www.quizzy.net.
Goals
- Create a user friendly quiz editor
- Create static URLs for the quizes
- Users were able to put the quizes on their site. However this shouldnt cause big server load.
Solution
Creating database structure and the basic program logic was a game play for the experienced developers in PIM.
However we had to decide the best way to reduce the server load. After investigating together with the help of the customer we found the best solution - the quiz forms were going to be hardcoded.
Methodology
We don't need anything special except PHP and MySQL to achieve this task. Having the right permissions to write in the server folders its all about generating strings and saving HTML files.
Implementation
As this article is not aboput creating a quiz site, we'll point our attention only to these features which required reducing of the server load.
A quiz editor for creating and editing quizes
While the creating of quizes isnt likely to be done by all the users of the site all the time, we wouldnt need to worry about the server load. Not that we can hardcode this editor in HTML ever!
The editor allows usres to create questions with various number and type of answers on each quiz.
Each quiz also had various number of results which were generated depending of user's answres.
Here we saw what we could use to reduce the server load:
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Quizes themself
What is one quiz in the terms of a website? Its just a HTML form. However our users are creating the quizes so nobody could know what forms will they create. The ordinary solution is to read the database with questions, select possible answers and display them to the users.
But all of this is database queries. We can't select questions and answers at once with JOIN, because both need to be ordered in the same way the user has put them in the editor.
This means at least one query for each question. Imagine a quiz with 30 questions taken from 100 users at the same time. This is 3000 queries at least. We don't wan't to do this.
So we were going to create pure HTML forms from the quizes at the time of creating. We also needed to update the quizes when users update them. So we add a button 'activate' for 'sending' the quiz online. Hitting this button actually takes the questions and answers from the database and creates HTML form. Below is a piece of code showing how easy this is:
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By Bobby Handzhiev
Creating database structure and the basic program logic was a game play for the experienced developers in PIM.
