pewc_filter_item_start_list.php

<?php
/**
 * Programmatically create swatches fields using images that have already been uploaded to your media library
 */
function demo_filter_item_start_list( $item, $group, $group_id, $post_id ) {

	$field_id = $item['field_id'];
	if( $field_id != 978 ) { // Change this to the ID of your field
		return $item;
	}

	// These image URLs must have been uploaded to your WP media library
	$urls = array(
		'https://yourdomain.com/wp-content/uploads/2025/06/0151.webp',
		'https://yourdomain.com/wp-content/uploads/2025/06/airforce_logo.webp',
		'https://yourdomain.com/wp-content/uploads/2025/06/Gunfighter_Silhouette.webp',
		'https://yourdomain.com/wp-content/uploads/2025/06/navy_corpsman.webp',
		'https://yourdomain.com/wp-content/uploads/2025/06/vmm-164.webp'
	);

	if( empty( $item['field_options'] ) ) {
		// Create new set of options
		$options = array();
	} else {
		// Add URLs to existing options
		$options = $item['field_options'];
	}
	
	foreach( $urls as $url ) {
		$image = attachment_url_to_postid( $url );
		$value = wc_get_filename_from_url( $url ); // Create option label from file name
		$options[] = array(
		  'image' => $image,
		  'value' => $value,
		  'price' => ''
		);
	 }
	
	$item['field_options'] = $options;

	return $item;

}
add_filter( 'pewc_filter_item_start_list', 'demo_filter_item_start_list', 10, 4 );