Implementation of the Location down box (PHP)

：

Style (bootstrap):

class= "Selectpicker show-tick Form-control", just a few more form-contro on the line

Concept:

First from the database to read the province, city, district;

The first province down box:

Read all of the province's data from the database and put it in the first down box, then compare the selected province's data with a bunch of provincial data (<if> tag), then finish the first one.

The Second city drop-down box:

Implementation of the Location down box (PHP)