[Sort product attributes in variations dropdown on single page by backend variations order ] #wp #woocommerce #products #product_attributes #sorting #terms #variations

sorting_in_variations_dropdown.php

<?php

add_filter('woocommerce_dropdown_variation_attribute_options_html', 'wc_dropdown_variation_attribute_options_sorted', 20, 2);
function wc_dropdown_variation_attribute_options_sorted( $html, $args ) {
    $args = wp_parse_args(
        apply_filters( 'woocommerce_dropdown_variation_attribute_options_args', $args ),
        array(
            'options'          => false,
            'attribute'        => false,
            'product'          => false,
            'selected'         => false,
            'name'             => '',
            'id'               => '',
            'class'            => '',
            'show_option_none' => __( 'Choose an option', 'woocommerce' ),
        )
    );

    // Get selected value.
    if ( false === $args['selected'] && $args['attribute'] && $args['product'] instanceof WC_Product ) {
        $selected_key = 'attribute_' . sanitize_title( $args['attribute'] );
        // phpcs:disable WordPress.Security.NonceVerification.Recommended
        $args['selected'] = isset( $_REQUEST[ $selected_key ] ) ? wc_clean( wp_unslash( $_REQUEST[ $selected_key ] ) ) : $args['product']->get_variation_default_attribute( $args['attribute'] );
        // phpcs:enable WordPress.Security.NonceVerification.Recommended
    }

    $options               = $args['options'];
    $product               = $args['product'];
    $attribute             = $args['attribute'];
    $name                  = $args['name'] ? $args['name'] : 'attribute_' . sanitize_title( $attribute );
    $id                    = $args['id'] ? $args['id'] : sanitize_title( $attribute );
    $class                 = $args['class'];
    $show_option_none      = (bool) $args['show_option_none'];
    $show_option_none_text = $args['show_option_none'] ? $args['show_option_none'] : __( 'Choose an option', 'woocommerce' ); // We'll do our best to hide the placeholder, but we'll need to show something when resetting options.

    if ( empty( $options ) && ! empty( $product ) && ! empty( $attribute ) ) {
        $attributes = $product->get_variation_attributes();
        $options    = $attributes[ $attribute ];
    }

    $html  = '<select id="' . esc_attr( $id ) . '" class="' . esc_attr( $class ) . '" name="' . esc_attr( $name ) . '" data-attribute_name="attribute_' . esc_attr( sanitize_title( $attribute ) ) . '" data-show_option_none="' . ( $show_option_none ? 'yes' : 'no' ) . '">';
    $html .= '<option value="">' . esc_html( $show_option_none_text ) . '</option>';

    if ( ! empty( $options ) ) {
        if ( $product && taxonomy_exists( $attribute ) ) {
            // Get terms if this is a taxonomy - ordered. We need the names too.
            $terms = wc_get_product_terms(
                $product->get_id(),
                $attribute,
                array(
                    'fields' => 'all',
                )
            );
            
            //sorting starts here
			foreach($terms as $key => $term) {
				$i = 0;
				foreach($product->get_available_variations() as $variation) {
					$i++;
					if ($term->slug == $variation['attributes'][$name]) {
						$key = $i - 1;
						unset($terms[$key]);
						$terms[$key] = $term;
					}
				}
			}

            ksort($terms);

            foreach ( $terms as $term ) {
                if ( in_array( $term->slug, $options, true ) ) {
                    $html .= '<option value="' . esc_attr( $term->slug ) . '" ' . selected( sanitize_title( $args['selected'] ), $term->slug, false ) . '>' . esc_html( apply_filters( 'woocommerce_variation_option_name', $term->name, $term, $attribute, $product ) ) . '</option>';
                }
            }
        } else {
            foreach ( $options as $option ) {
                // This handles < 2.4.0 bw compatibility where text attributes were not sanitized.
                $selected = sanitize_title( $args['selected'] ) === $args['selected'] ? selected( $args['selected'], sanitize_title( $option ), false ) : selected( $args['selected'], $option, false );
                $html    .= '<option value="' . esc_attr( $option ) . '" ' . $selected . '>' . esc_html( apply_filters( 'woocommerce_variation_option_name', $option, null, $attribute, $product ) ) . '</option>';
            }
        }
    }

    return $html .= '</select>';

}

Hey! Thanks for the code. Is there a shorter version for this one?