Get a specific category obj depending on the field (name, slug or id) and the value of the field.

wc_get_product_category.php

<?php
/**
 * Return a product obj depending on field and value
 * Authorised fields : term_id, name, slug
 * @author Franck LEBAS
 * @param string $field
 * @param string $value
 * @return obj, array or string $response
 */
function  wc_get_product_category($field, $value) {
	$authorized_fields = array(
		'term_id',
		'name',
		'slug'
	);
	// Check if field and value are set and not empty
	if (!isset($field) || empty($field) || !isset($value) || empty($value)) {
		$response = "Error : check your args, some are not set or are empty.";
	}
	else {
		// Check if the specified field is part of the authorised ones
		if (!in_array($field, $authorized_fields)) {
			$response = "Unauthorised field $field";		}
		else {
			// init exists var to determine later if specified value matches
			$exists = false;
			$product_cats = get_terms('product_cat', array(
				'hide_empty' => 0,
				'orderby' => 'name'
			));
			// the loop will stop once it will have found the matching value in categories
			foreach ($product_cats as $product_cat) {
				if($product_cat->$field == $value) {
					$response = $product_cat;
					$exists = true;
					break; 
				}
			}
			if ($exists == false) {
				$response = array(
					"message" => "Error with specified args",
					"field" => "$field",
					"value" => "$value"
				);
			}
		}
	}
	return $response;
}
?>