Fatal error: Uncaught Error: Class 'PHPExcel_Settings' not found in C:\xampp\htdocs\wy_zhuce\PHPExcel-1.8\Classes\PHPExcel\Writer\PDF\mPDF.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wy_zhuce\PHPExcel-1.8\Classes\PHPExcel\Writer\PDF\mPDF.php on line 4