作者原话PhpSpreadsheet is a library written in pure PHP and offers a set of classes that allow you to read and write various spreadsheet file formats such as Excel and LibreOffice Calc.翻译过来PhpSpreadsheet是

如果不使用await等待异步请求，那么输出格式将会是这样的。这是使用await等待异步请求后的结果。