Hey. I need to use a nested set model to manage product categories on my site. Does anyoune know some good PHP built-in libraries for handling nested sets in MySQL?
You can try "Baobab", this is the library I recently released.
http://www.sideralis.org/baobab/
, PHP- "dbtree" PHPClasses.org, , , - http://www.phpclasses.org/package/2547-PHP-Manipulate-database-records-in-hierarchical-trees.html
You can use a PHP ORM solution like Propel or Doctrine , both of which support nested sets.