我已经为某些产品添加了运输类，但我不是故意的。
我希望他们回到没有运输类或null。
目前是节目：
[ “shipping_class”] =＆GT; string（3）“myw”
如果没有货运类，则显示为：
[shipping_class] =＆gt;
我正在上传['shipping_class'] =＆gt; null但它不会改变......任何想法？
array(1) {
["update"]=>
array(1) {
[0]=>
array(66) {
["id"]=>
int(6270)
["name"]=>
string(25) "Washdown Pump Kit - 20LPM"
["slug"]=>
string(23) "washdown-pump-kit-20lpm"
["permalink"]=>
string(66) "https://site/store/product/washdown-pump-kit-20lpm/"
["date_created"]=>
string(19) "2018-01-17T20:59:40"
["date_created_gmt"]=>
string(19) "2018-01-17T20:59:40"
["date_modified"]=>
string(19) "2018-01-17T20:59:40"
["date_modified_gmt"]=>
string(19) "2018-01-17T20:59:40"
["type"]=>
string(6) "simple"
["status"]=>
string(7) "publish"
["featured"]=>
bool(false)
["catalog_visibility"]=>
string(7) "visible"
["description"]=>
string(40) "Washdown Pump Kit - 20LPM 70PSI"
["short_description"]=>
string(0) ""
["sku"]=>
string(16) "SFDW1-055-070-51"
["price"]=>
string(6) "159.00"
["regular_price"]=>
string(6) "159.00"
["sale_price"]=>
string(0) ""
["date_on_sale_from"]=>
NULL
["date_on_sale_from_gmt"]=>
NULL
["date_on_sale_to"]=>
NULL
["date_on_sale_to_gmt"]=>
NULL
["price_html"]=>
string(175) "$159.00 Inc. GST"
["on_sale"]=>
bool(false)
["purchasable"]=>
bool(true)
["total_sales"]=>
int(0)
["virtual"]=>
bool(false)
["downloadable"]=>
bool(false)
["downloads"]=>
array(0) {
}
["download_limit"]=>
int(-1)
["download_expiry"]=>
int(-1)
["external_url"]=>
string(0) ""
["button_text"]=>
string(0) ""
["tax_status"]=>
string(7) "taxable"
["tax_class"]=>
string(0) ""
["manage_stock"]=>
bool(true)
["stock_quantity"]=>
int(4)
["in_stock"]=>
bool(true)
["backorders"]=>
string(2) "no"
["backorders_allowed"]=>
bool(false)
["backordered"]=>
bool(false)
["sold_individually"]=>
bool(false)
["weight"]=>
string(4) "3720"
["dimensions"]=>
array(3) {
["length"]=>
string(3) "400"
["width"]=>
string(3) "142"
["height"]=>
string(3) "450"
}
["shipping_required"]=>
bool(true)
["shipping_taxable"]=>
bool(true)
["shipping_class"]=>
string(3) "myw"
["shipping_class_id"]=>
int(499)
["reviews_allowed"]=>
bool(true)
["average_rating"]=>
string(1) "0"
["rating_count"]=>
int(0)
["related_ids"]=>
array(2) {
[0]=>
int(5857)
[1]=>
int(5629)
}
["upsell_ids"]=>
array(0) {
}
["cross_sell_ids"]=>
array(0) {
}
["parent_id"]=>
int(0)
["purchase_note"]=>
string(0) ""
["categories"]=>
array(2) {
[0]=>
array(3) {
["id"]=>
int(405)
["name"]=>
string(9) "12V Pumps"
["slug"]=>
string(9) "12v-pumps"
}
[1]=>
array(3) {
["id"]=>
int(243)
["name"]=>
string(5) "Pumps"
["slug"]=>
string(5) "pumps"
}
}
["tags"]=>
array(0) {
}
["images"]=>
array(1) {
[0]=>
array(9) {
["id"]=>
int(6276)
["date_created"]=>
string(19) "2018-01-17T20:59:53"
["date_created_gmt"]=>
string(19) "2018-01-17T20:59:53"
["date_modified"]=>
string(19) "2018-01-17T20:59:53"
["date_modified_gmt"]=>
string(19) "2018-01-17T20:59:53"
["src"]=>
string(75) "https://site/store/wp-content/uploads/2018/01/image-662.jpeg"
["name"]=>
string(0) ""
["alt"]=>
string(0) ""
["position"]=>
int(0)
}
}
["attributes"]=>
array(0) {
}
["default_attributes"]=>
array(0) {
}
["variations"]=>
array(0) {
}
["grouped_products"]=>
array(0) {
}
["menu_order"]=>
int(0)
["meta_data"]=>
array(0) {
}
["_links"]=>
array(2) {
["self"]=>
array(1) {
[0]=>
array(1) {
["href"]=>
string(61) "https://site/store/wp-json/wc/v2/products/6270"
}
}
["collection"]=>
array(1) {
[0]=>
array(1) {
["href"]=>
string(56) "https://site/store/wp-json/wc/v2/products"
}
}
}
}
}
}