WooCommerce General Helper Functions

snippet.php

/**
 * Determine if product ID is in cart. Returns true if so, false otherwise.
 */
function is_product_in_cart($product_id) {
  $in_cart = false;
 
  foreach( WC()->cart->get_cart() as $cart_item ) {
     $product_in_cart = $cart_item['product_id'];
     $variation_in_cart = 0;
     if( isset( $cart_item['variation_id'] ) ) {
      $variation_in_cart = $cart_item['variation_id'];
     }
     if ( $product_in_cart === $product_id ) $in_cart = true;
     if ( $variation_in_cart === $product_id ) $in_cart = true;
  }
 
  return $in_cart;
}

/**
 * Returns an array of product IDs in cart.
 */
function get_cart_product_ids() {
  $in_cart = array();

  foreach( WC()->cart->get_cart() as $cart_item ) {
    if( isset( $cart_item['variation_id'] ) ) {
      array_push( $in_cart, $cart_item['variation_id'] );
    } else {
      array_push( $in_cart, $cart_item['product_id'] );
    }
  }
 
  return $in_cart;
}