好吧，终于知道了. params数组需要特殊的输入，以使用键"options_xx_file_action"告诉自定义选项如何处理文件("save_new"或"save_old").看起来像这样:

Ok finally figured this out. The params array needs special entry to tell the custom option with the key "options_xx_file_action" what to do with a file ('save_new' or 'save_old'). This would look like:

$params = array(
    'product'       => $productId,
    'qty'           => $quantity,
    'options'       => array(
        $customOptionSize->getId()  => $selectedSize,
        $customOptionColor->getId() => $selectedColor,
    ),
    'options_'.$customOptionDesign->getId().'_file_action'=>'save_new',
);

很显然，您需要将文件添加到发布请求中(通过表单或类似方式).该文件的名称应为"options_xx_file".例如，在我的情况下，我的$ _FILES看起来像:

Obviously, you will need to add the file to the post request (via form or therelike). The name of the file should be "options_xx_file". For example, in my case my $_FILES looked like:

Array (
[options_108_file] => Array
    (
        [name] => i-like.png
        [type] => application/octet-stream
        [tmp_name] => C:\xampp\tmp\phpAAB8.tmp
        [error] => 0
        [size] => 6369
    )

)