woocommerce get attribute terms - attributes

Question

In Woocommerce you can add global product attributes and terms. So for instance:
Size (attribute)
small (term)
medium (term)
large (term)
This is product independent. You can then select from the pre defined attributes on a product.
I need to get all of the terms in an attribute with php. So select the attribute required, eg size, and then return an array including [small,medium,large].
Seems simple enough but I can't find any help on doing this.

Answer 1

Slightly confusing, especially when looking through the WooCommerce Docs since there is absolutely no mention of getting a list of the terms/attributes.
The Attributes are saved as a custom taxonomy, and the terms are taxonomy terms. That means you can use native Wordpress functions: Wordpress get_terms() Function Reference
By clicking on an attribute in WooCommerce, you can look in the URL and you can see they are all prepended with 'pa_'
This is likely what you need:
$terms = get_terms("pa_size");
foreach ( $terms as $term ) {
echo "<option>" . $term->name . "</option>";
}

Answer 2

I wanted to be able to get all the different attributes from the backend that were set, and get them in an array for me to work with, I took some code from the class-wc-admin-attributes.php file and modified it for my needs:
<?php
$attribute_taxonomies = wc_get_attribute_taxonomies();
$taxonomy_terms = array();
if ($attribute_taxonomies) :
foreach ($attribute_taxonomies as $tax) :
if (taxonomy_exists(wc_attribute_taxonomy_name($tax->attribute_name))) :
$taxonomy_terms[$tax->attribute_name] = get_terms(wc_attribute_taxonomy_name($tax->attribute_name), 'orderby=name&hide_empty=0');
endif;
endforeach;
endif;
var_dump($taxonomy_terms);
exit;
This will loop through all the attribute taxonomies, retrieve the terms for each, leaving you with an array of term objects to work with for each taxonomy.

Answer 3

Since 4.5.0, taxonomies should be passed via the ‘taxonomy’ argument in the $args array:
$terms = get_terms( array(
'taxonomy' => 'pa_taxonyname',
'hide_empty' => false,
) );
For example, if the taxonomy slug is 'date', so the taxonomy will be 'pa_date'.
You can also mouse over the attribute name and see the taxonomy name at the bottom of the browser.
I hope it helps!

Answer 4

I use this:
echo '<h1>variations</h1>';
mario( $product->get_available_variations());
echo '<h1>Atributos</h1>';
mario($product->get_attributes());
echo '<h1>Poste Terms</h1>';
mario(wp_get_post_terms( $post->ID, 'pa_color'));
function mario($texto){
echo '<pre>';var_dump($texto);echo '</pre>';
};
Really with: "wp_get_post_terms( $post->ID, 'pa_color')" i search only one term, but the idea is to loop for the key ['name'] that return that function.

Answer 5

Get all attributes with attribute terms in woocommerce.
$attributes = wc_get_attribute_taxonomies();
foreach ($attributes as $attribute) {
$attribute->attribute_terms = get_terms(array(
'taxonomy' => 'pa_'.$attribute->attribute_name,
'hide_empty' => false,
));
}