我通过 composer require mk-j/php_xlsxwriter 安装了PHP_XLSXWriter

但是在设置命名空间时
use mk-j\phpxlsxwriter; //语法解析错误: syntax error, unexpected '-', expecting ',' or ';'
use phpxlsxwriter; //致命错误: Class 'XLSXWriter' not found

调用是通过 $writer = new \XLSXWriter();

谢谢各位高手，敬请指点。