get_terms wp

get_category.php

<?php

include __DIR__.'/wp-load.php';

// Get all category of wordpress site.
// Categories are actually term located in `wp_terms` table.

$categories = get_terms();

// This will fetch all categories of all post type of the site.
print_r( $categories );

// How can we fetch only a specific post type categories?
// By defining taxonomy

$product_cats = get_terms(array(
					'taxonomy'	=>	'product_cat'
				));

print_r( $product_cats );