Php uses the classification list to generate a classification tree array.

Php uses the classification list to generate a classification tree array.

This example describes how php generates a category tree array through the category list. Share it with you for your reference. The specific analysis is as follows:

Here, $ list is the category list array, the key is the category ID, the value is the category Node object, and the pid is the parent category ID.

The php code is as follows:

$ Tree = array (); foreach ($ list as $ id => $ row) {$ pid = $ row-> pid; if ($ pid = 0) {$ tree [] = & $ list [$ id];} else if (isset ($ list [$ pid]) {$ parent = & $ list [$ pid]; $ parent-> children [] = & $ list [$ id]; // Add the children attribute to identify the subcategory list }}

I hope this article will help you with php programming.