Get Category Image ID Helper

helper.php

<?php
/**
 * Helper function to get ID of feast category image
 *
 * @since 7.7.0
 *
 * @param string $taxonomy Name of the taxonomy
 */
function get_feast_category_image_id( $term ) {

     // check if category exists
     if ( ! category_exists( $term ) ) {
          return;
     }

     // get associated term ID
     $term_object = get_term_by( 'slug', $term, 'category');
     $term_id = $term_object->term_id;

     // get feast category imgae URL
     $feast_category_image_url = get_term_meta( $term_id, 'feast-category-image-url', true );

     // check if term has associated feast category image URL
     if ( empty( $feast_category_image_url ) ) {
          return;
     }

     $feast_category_image_id = attachment_url_to_postid( $feast_category_image_url );
     return $feast_category_image_id;
}