Automattic / jetpack

modules/woocommerce-analytics/classes/wp-woocommerce-analytics-utils.php

<?php
/**
 * Jetpack_WooCommerce_Analytics_Options provides a single interface to module options
 *
 * @package Jetpack
 * @author Automattic
 */

/**
 * Bail if accessed directly
 */
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Class Jetpack_WooCommerce_Analytics_Utils
 * Utility function for WooCommerce Analytics
 */
class Jetpack_WooCommerce_Analytics_Utils {
	/**
	 * Gets product categories or varation attributes as a formatted concatenated string
	 *
	 * @param array $product WC_Product.
	 * @return string
	 */
	public static function get_product_categories_concatenated( $product ) {
		if ( ! class_exists( 'WooCommerce' ) ) {
			return '';
		}

		if ( ! $product ) {

The expression $product of type array is implicitly converted to a boolean; are you sure this is intended? If so, consider using empty($expr) instead to make it clear that you intend to check for an array without elements.

			return '';
		}

		$variation_data = $product->is_type( 'variation' ) ? wc_get_product_variation_attributes( $product->get_id() ) : '';

The method is_type cannot be called on $product (of type array).

The method get_id cannot be called on $product (of type array).

		if ( is_array( $variation_data ) && ! empty( $variation_data ) ) {
			$line = wc_get_formatted_variation( $variation_data, true );
		} else {
			$out        = array();
			$categories = get_the_terms( $product->get_id(), 'product_cat' );

The method get_id cannot be called on $product (of type array).

			if ( $categories ) {
				foreach ( $categories as $category ) {
					$out[] = $category->name;
				}
			}
			$line = join( '/', $out );
		}
		return $line;
	}
}