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Daniel Cousineau's Blog:
Hierarchical Data With PHP and MySQL
June 02, 2008 @ 12:09:37

Daniel Cousineau submitted a new blog post he's come up with that looks at using hierarchical data in a MySQL database.

I recently had fun with an all-to-common issue with SQL driven websites: hierarchical data. For those who don't like big words, think trees. Other people have already discussed storage methods, and I would actually highly suggest you read the writeup if you haven't already.

He includes a sample table you can work from and some code that can be used to generate a select (based on a $depth variable) parent/child values from it. A few simple function calls later and you have a nested array or lots of little subarrays maintaining the parent/child relationships the database has.

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