2 terms with same slug #term #wp

get_terms_with_same_slug.php

<?php
/**
 * Get terms with the same slug in two different taxonomies.
 *
 * @param string $taxonomy_1 The first taxonomy.
 * @param string $taxonomy_2 The second taxonomy.
 * @return array An associative array where the key is the term ID of taxonomy_1 and the value is the term ID of taxonomy_2.
 */
function get_terms_with_same_slug($taxonomy_1, $taxonomy_2) {
    $terms_taxonomy_1 = get_terms([
        'taxonomy' => $taxonomy_1,
        'hide_empty' => false,
    ]);

    $terms_taxonomy_2 = get_terms([
        'taxonomy' => $taxonomy_2,
        'hide_empty' => false,
    ]);

    if (is_wp_error($terms_taxonomy_1) || is_wp_error($terms_taxonomy_2)) {
        return [];
    }

    $taxonomy_2_slugs = [];
    foreach ($terms_taxonomy_2 as $term) {
        $taxonomy_2_slugs[$term->slug] = $term->term_id;
    }

    $result = [];
    foreach ($terms_taxonomy_1 as $term) {
		
        if (isset($taxonomy_2_slugs[$term->slug])) {
            $result[$term->term_id] = $taxonomy_2_slugs[$term->slug];
        }
    }

    return $result;
}