PHPExcel讀取數據報版本錯誤或者內存溢出

1. PHPExcel讀取xls格式的文件 

$excelReader = \PHPExcel_IOFactory::createReader('Excel5');    

2. PHPExcel讀取xlsx格式的文件 

$excelReader = \PHPExcel_IOFactory::createReader('Excel2007');  

3. 不知道哪個版本時 :

$excelReader = \PHPExcel_IOFactory::createReader('Excel5');	
if(!$excelReader->canRead($path)){
	$excelReader = \PHPExcel_IOFactory::createReader('Excel2007');	
}

4. 當讀取Excel出現內存溢出時 , 在load文件前

$excelReader->setReadDataOnly(true);