Woocommerce - count specific product quantity bought by customer in all orders

product_qty_bought.php

<?php

/**
 * Woocommerce - count specific product quantity bought by customer in all orders
 * 
 * @param (int) $product_id
 * @return int|bool
 * @author devpilot
 **/
function product_qty_bought($product_id){
	global $post;

	$count = 0;

	$customer_orders = get_posts( array(
		'numberposts' => -1,
		'meta_key'    => '_customer_user',
		'meta_value'  => get_current_user_id(),
		'post_type'   => wc_get_order_types(),
		'post_status' => array_keys( wc_get_order_statuses()),
	));
	
	foreach ($customer_orders as $customer_order) {
		if ($customer_order->post_status == "wc-processing" || $customer_order->post_status == "wc-completed") {
			$order = new WC_Order($customer_order->ID);
			if (count( $order->get_items()) > 0 ) {
				foreach( $order->get_items() as $item ) {
					if ($item['product_id'] == $product_id) {
						$count = $count + $item['qty'];
					}
				}
			}
		}
	}
	return ($count > 0) ? $count : false;
}
?>