php上传Excel文件时如何判断文件中有图片

$excelPath = 'Test.xls';
 
 $objReader = PHPExcel_IOFactory::createReader('Excel5');
 $objReader->setReadDataOnly(true);
 
 $objPHPExcel = $objReader->load($excelPath);
 $currentSheet = $objPHPExcel->getActiveSheet();
 $AllImages= $currentSheet->getDrawingCollection();
 
 if(count($AllImages) > 0) {
    //处理
 }