1、sprintf
$hiddenImgInputFormat = '<input type="hidden" name="EbayListing[child_sku_img][%s][%s][%s][]" value="%s"/>';
$hiddenImageInput .= sprintf($hiddenImgInputFormat ,$siteid, $account_id, $child['sku'], $img);
1、sprintf
$hiddenImgInputFormat = '<input type="hidden" name="EbayListing[child_sku_img][%s][%s][%s][]" value="%s"/>';
$hiddenImageInput .= sprintf($hiddenImgInputFormat ,$siteid, $account_id, $child['sku'], $img);