尝试使用下面的代码将产品添加到 $products SimpleXML 对象时，我收到错误警告：文件中存在非法偏移类型，无法找出问题所在。
$fields = array(
$o->order_id => 'order_id',
$o->order_address_id => 'order_address_id',
$o->price_ex_tax => 'price_ex_tax' ,
'DISCS' => 'sku',
'1' => 'quantity'
);
$products->addChild('product');
array_walk_recursive($fields, array ($products, 'addChild'));
这是我对 $products 使用 print_r 的 SIMPLEXML 对象：
SimpleXMLElement Object
(
[product] => Array
(
[0] => SimpleXMLElement Object
(
[id] => 23
[order_id] => 110
[product_id] => 63477
[order_address_id] => 11
[name] => Dead Sea Treasures Foot Cream
[sku] => 703
[type] => physical
[base_price] => 20.0000
[price_ex_tax] => 20.0000
[price_inc_tax] => 20.0000
[price_tax] => 0.0000
[base_total] => 40.0000
[total_ex_tax] => 40.0000
[total_inc_tax] => 40.0000
[total_tax] => 0.0000
[weight] => 0.5
[quantity] => 2
[base_cost_price] => 0.0000
[cost_price_inc_tax] => 0.0000
[cost_price_ex_tax] => 0.0000
[cost_price_tax] => 0.0000
[is_refunded] => false
[refund_amount] => 0.0000
[return_id] => 0
[wrapping_name] => SimpleXMLElement Object
(
)
[base_wrapping_cost] => 0.0000
[wrapping_cost_ex_tax] => 0.0000
[wrapping_cost_inc_tax] => 0.0000
[wrapping_cost_tax] => 0.0000
[wrapping_message] => SimpleXMLElement Object
(
)
[quantity_shipped] => 0
[event_name] => NULL
[event_date] => SimpleXMLElement Object
(
)
[fixed_shipping_cost] => 0.0000
[ebay_item_id] => SimpleXMLElement Object
(
)
[ebay_transaction_id] => SimpleXMLElement Object
(
)
[option_set_id] => NULL
[parent_order_product_id] => NULL
[is_bundled_product] => false
[bin_picking_number] => SimpleXMLElement Object
(
)
[applied_discounts] => SimpleXMLElement Object
(
[discount] => SimpleXMLElement Object
(
[id] => 1
[amount] => 4
)
)
[product_options] => SimpleXMLElement Object
(
)
[configurable_fields] => SimpleXMLElement Object
(
)
)
[1] => SimpleXMLElement Object
(
[id] => 24
[order_id] => 110
[product_id] => 63398
[order_address_id] => 11
[name] => Naot Matai
[sku] => 11410-37-577
[type] => physical
[base_price] => 166.0000
[price_ex_tax] => 166.0000
[price_inc_tax] => 166.0000
[price_tax] => 0.0000
[base_total] => 166.0000
[total_ex_tax] => 166.0000
[total_inc_tax] => 166.0000
[total_tax] => 0.0000
[weight] => 2
[quantity] => 1
[base_cost_price] => 0.0000
[cost_price_inc_tax] => 0.0000
[cost_price_ex_tax] => 0.0000
[cost_price_tax] => 0.0000
[is_refunded] => false
[refund_amount] => 0.0000
[return_id] => 0
[wrapping_name] => SimpleXMLElement Object
(
)
[base_wrapping_cost] => 0.0000
[wrapping_cost_ex_tax] => 0.0000
[wrapping_cost_inc_tax] => 0.0000
[wrapping_cost_tax] => 0.0000
[wrapping_message] => SimpleXMLElement Object
(
)
[quantity_shipped] => 0
[event_name] => NULL
[event_date] => SimpleXMLElement Object
(
)
[fixed_shipping_cost] => 0.0000
[ebay_item_id] => SimpleXMLElement Object
(
)
[ebay_transaction_id] => SimpleXMLElement Object
(
)
[option_set_id] => 32446
[parent_order_product_id] => NULL
[is_bundled_product] => false
[bin_picking_number] => SimpleXMLElement Object
(
)
[applied_discounts] => SimpleXMLElement Object
(
)
[product_options] => SimpleXMLElement Object
(
[option] => Array
(
[0] => SimpleXMLElement Object
(
[id] => 57
[option_id] => 49564
[product_option_id] => 36782
[display_name] => Womens Shoe Size
[display_value] => 37 (US6)
[value] => 277224
[type] => SimpleXMLElement Object
(
)
[name] => SimpleXMLElement Object
(
)
[display_style] => SimpleXMLElement Object
(
)
)
[1] => SimpleXMLElement Object
(
[id] => 58
[option_id] => 49565
[product_option_id] => 36783
[display_name] => Shoe Color
[display_value] => Copper/Wine Suede
[value] => 277232
[type] => SimpleXMLElement Object
(
)
[name] => SimpleXMLElement Object
(
)
[display_style] => SimpleXMLElement Object
(
)
)
)
)
[configurable_fields] => SimpleXMLElement Object
(
)
)
)