php上传Excel文件时如何判断文件中有图片？

需要借助PHPExcel这个库

 1 $excelPath = 'Test.xls';
 2 
 3 $objReader = PHPExcel_IOFactory::createReader('Excel5');
 4 $objReader->setReadDataOnly(true);
 5 
 6 $objPHPExcel = $objReader->load($excelPath);
 7 $currentSheet = $objPHPExcel->getActiveSheet();
 8 $AllImages= $currentSheet->getDrawingCollection();
 9 
10 if(count($AllImages) > 0) {
11    //处理
12 }