Woocommerce在订单编辑时添加额外的action操作

默认的订单action动作中有三个，如黄框中所示。

但是，我想添加一个其他操作，比如把订单同步到其他平台，或者是发送一个自定义的邮件内容，我们可以这么做，我这里以只发送订单信息为例子：

1、添加action动作，并发送invoice邮件：

//后台添加action
add_filter( 'woocommerce_order_actions','woocommerce_order_actions_function',10,2);
function woocommerce_order_actions_function($actions, $order){
    $actions['send_order_details_customer'] =  __( '只发送订单详情邮件给用户', 'woocommerce' );
    return $actions;
}
//添加只发送订单详情给用户，并在customer-invoice.php中修改，具体查看文件中send_order_details_customer判断
add_action('woocommerce_order_action_send_order_details_customer','woocommerce_order_action_send_order_details_customer_function',10,1);
function woocommerce_order_action_send_order_details_customer_function($order){
	// Send the customer invoice email.
	WC()->payment_gateways();
	WC()->shipping();
	WC()->mailer()->customer_invoice( $order );
}

2、对invoice邮件进行编辑（/woocommerce/emails/customer-invoice.php）：

<?php $action = wc_clean( wp_unslash( $_POST['wc_order_action'] ) ); 
if($action != "send_order_details_customer"){
//action的内容
}else{
//原来的内容
}