taxonomy.php

<?php 
/*
 * Reference
 *
 * Term object keys:
 * [term_id, name, slug, term_group, term_taxonomy_id, taxonomy, description, parent]
 *
 */


/*
 * Scope: Global
 */

// Get all terms in a taxonomy
$terms = get_terms( 'taxonomy (string|array)', array('orderby' => 'menu_order') );

// Get a term object from id/slug/name
$term = get_term_by( 'field ("id"|"slug"|"name")', 'value (string|int)', 'taxonomy (string)' );

// Get term archive url
$url = get_term_link( $term (term object|term ID|term slug), $taxonomy );


/*
 * Scope: Post
 */

// Get post terms
$terms = wp_get_post_terms( $post->ID, 'taxonomy (string|array)' );