custom variation.php

<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}
//require('VariantSettings.php');
/*
 * Todo: php max_input_vars and woocommerce
 * Todo: define( 'WC_MAX_LINKED_VARIATIONS', 100 );
 */


class VariantImages {
	public function __construct() {
		add_action( 'admin_init', array( $this, 'init_attribute_hooks' ) );
		add_filter( 'product_attributes_type_selector', array(
			$this,
			'add_attribute_selector'
		) );
		//woocommerce_atributes for front
		add_action( 'woocommerce_product_option_terms', array(
			$this,
			'add_image_upload_field'
		), 10, 2 );
	/*	add_action( 'woocommerce_dropdown_variation_attribute_options_html', array(
			$this,
			'display_image_attributes'
		) );
*/


		$attribute_taxonomies = wc_get_attribute_taxonomies();

		foreach ( $attribute_taxonomies as $attr_tax ) {
			$tax_name = 'pa_' . $attr_tax->attribute_name;
			//WHAT EVER THIS MAKES ITS NOT WORKING
			add_action( $tax_name . '_add_form_fields', array( $this, 'add_attribute_term_fields' ) );
			add_action( $tax_name . '_edit_form_fields', array( $this, 'add_attribute_term_fields' ) );

			/*
			 *
						add_action( $tax_name . '_edit_form_fields', array( $this, 'edit_attribute_term_fields' ), 20, 2 );
			 */
		}

	}


	function init_attribute_hooks() {

		if ( empty( $attribute_taxonomies ) ) {
			return;
		}


		add_action( 'created_term', array( $this, 'save_term_meta' ), 10, 2 );
		add_action( 'edit_term', array( $this, 'save_term_meta' ), 10, 2 );
	}

	function add_attributes_term_fields() {
/*
		$taxonomy = isset( $_GET['taxonomy'] ) ? $_GET['taxonomy'] : false;
		if ( ! $taxonomy ) {
			return;
		}

*/

	}

	function save_term_meta( $term_id, $tt_id ) {

		if ( isset( $_POST['image'] ) ) {

		}
	}

	/**
	 * Zeigt das HTML in der Produkt Eigeschaft von Images
	 *
	 * @param $tax
	 */
	public function add_image_upload_field( $tax, $i ) {
		global $woocommerce;
		$attribute_taxonomy_name = 'pa_' . $tax->attribute_name;
		//$all_terms = get_terms( $attribute_taxonomy_name );

		if ( 'image' === $tax->attribute_type ) {

			?>
			
            <select multiple="multiple" data-placeholder="<?php _e( 'Select terms', 'renka-text-domain' ); ?>"
                    class="multiselect attribute_values" name="attribute_values[<?php echo $i; ?>][]">
                <option value="wtf"> wtf</option>
            </select>
            <button type="button">Add Image</button>
			<?php
		}
	}

	/**
	 * @description Fügt eine neues feld "Images" hinzu um Verschiedene Variationen von Bilder darzustellen
	 *
	 * @param $types
	 *
	 * @return array
	 */
	function add_attribute_selector( $types ) {
		$image_type = array(
			'image' => __( 'Image', 'renka-text-domain' )
		);

		return array_merge( $types, $image_type );
	}

	function display_image_attributes() {
		$type = 'image';
	}
}

new VariantImages();