php方法读取没有PHPExcel的xlsx文件

is their any method or class or script to read xlsx file into database as i tried with phpexcel but that is very heavy and take time to load and some time i need to import data count like 300000 so its harder for phpexcel to read then store in database. so can you tel me any working script alternate for xlsx file to read.is their any method or class or script to read