Learn how to create an object oriented database abstraction class for MySQL database. Besides the basic functions this manager class can summarize total time spent with db connection and query execution and counts how many query were executed during your PHP script.
This tutorial assumes that you already are familiar with writing PHP code, and that you have a working MySQL installation, and that you are familiar with basic SQL syntax. If not please use these tutorials first:
Basic PHP and Apache Installation Guide on Windows
MySQL Installation Guide on Windows
Simple PHP Tutorial.
While the word "integrity" connotes "wholeness", it's important to understand what it means specifically in the case of relational database design. Failure to ensure data integrity can result in the database returning incorrect results, or in data becoming unretrievable. This is true of all relational databases, not just MySQL. Fortunately, the principles of data integrity are not difficult to understand. How difficult they are to implement in MySQL and PHP will depend in large degree on how many tables and relationships the database has. This article will start with an overview of relational concepts, and then illustrate each of the concepts with simple examples.
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