README

If you are not using any PHP framework and need to manage tree structure data, here is the library using Nested Sets Pattern to Model Tree Structure in PHP

Installation

To install the library, you can simply clone the library and include the file pdo.nestedset.php. If you are using Composer in your project, it is really simple to install nestedset-php.

# Install Composer
curl -sS https://getcomposer.org/installer | php

# Add nestedset-php as a dependency
php composer.phar require ben-nsng/nestedset-php:*

Usage

$pdo = new PDO('mysql:host=localhost;dbname=tree', 'tree', 'tree');
$treeModel = new NestedSet($pdo);
$treeModel->changeTable('tree'); // default table is tree

API

Instance methods:

// init table for first creating table
$treeModel->addRoot();

// add new node to root node, return node id
$treeModel->addNode($label);

// add new node into parent node return node id
$treeModel->addNode($label, $parent_id);

// return database statement object
$nodes = $treeModel->selectAll();
// array of nodes (stdclass)
$nodes->result();

// move existing node into parent node
$treeModel->addChild($node_id, $parent_id);

// move existing node before next node
$treeModel->addBefore($node_id, $next_id);

// move existing node after last node
$treeModel->addBefore($node_id, $last_id);

// delete existing node, including nodes inside node
$treeModel->deleteNode($node_id)

Related Links/Resources

• Inspired by [MySQL stored procedures to manage hierarchical trees in a MySQL database] (http://moinne.com/blog/ronald/mysql/manage-hierarchical-data-with-mysql-stored-procedures)
• [Nested Set Model] (http://en.wikipedia.org/wiki/Nested_set_model)
• [Managing Hierarchical Data in MySQL] (http://mikehillyer.com/articles/managing-hierarchical-data-in-mysql/)
• [Storing Hierarchical Data in a Database] (http://www.sitepoint.com/hierarchical-data-database/)

Authors

• Ben Ng: https://github.com/ben-nsng