BD Address Fields for WooCommerce

Bangladeshi stores usually ask customers to type their thana or upazila into a
free text box. Customers spell it differently every time, delivery staff have
to guess, and couriers reject addresses they cannot match.

This plugin replaces that text box with a dropdown. The customer picks a
District, and the Thana / Upazila list updates instantly to show only
the areas inside that district.

Complete, current data

• All 64 districts, using the official English spellings adopted in 2018:
  Chattogram, Cumilla, Barishal, Jashore and Bogura.
• 620 thanas and upazilas in total.
• Metropolitan police thanas are included alongside rural upazilas for Dhaka,
  Chattogram, Khulna, Rajshahi, Sylhet, Gazipur, Narayanganj, Barishal and
  Rangpur. A customer in Mirpur, Uttara, Panchlaish or Sonadanga can select
  their actual area rather than the nearest rural upazila.

Built for real stores

• Works on the checkout, My Account address forms, and the cart shipping
  calculator.
• Nothing is preselected. The district field prompts “Please select district”
  and the thana field prompts “Please select district first” until a district
  is chosen, then “Please select thana”.
• Districts WooCommerce would otherwise prefill from your shop base address or
  IP geolocation are cleared, so a customer outside your own city is never
  quoted the wrong delivery charge because they skimmed past a guessed field.
  A returning customer’s own saved address is left untouched.
• Declares compatibility with WooCommerce High-Performance Order Storage
  (HPOS) and the Cart and Checkout Blocks features.
• Adds no database tables, no settings page, and no admin bloat. The data ships
  as plain PHP arrays, so there are no extra queries on the checkout.
• Around 3 KB of gzipped data is added to the checkout page, loaded only where
  address fields are actually rendered.

Data sources

District and thana names are cross-checked against the Dhaka Metropolitan
Police station directory and public Bangladesh administrative division records.

Credits

This plugin is a derivative work distributed under the GNU General Public
License v2 or later.

• The states and places architecture, and the cascading select script, come
  from the WC City Select plugin, https://wordpress.org/plugins/wc-city-select/
• The Bangladesh adaptation, “Thana/Upazila Dropdown for Woocommerce
  [Bangladesh]”, is by Md Rasel Khan,
  https://github.com/immdraselkhan/Thana-Upazila-Dropdown-for-Woocommerce-Bangladesh