请教如何使用Php生成真正的Excel文件？PS：不使用PHPEXCEL太卡！
最近有项目需要大批量导出数据到 Excel文件，前期使用的是PhpExcel，在数据量较少的时候还行！但在大批量数据比如达到1万行时候，消耗的内存就太高了，很容易溢出！
使用生成XML另存为XLS格式的话，效率倒是很快,但是会在打开文件时候弹出提示 “您尝试打开的‘XX.XLS’格式与文件扩展名指定的格式不一致...” 非常的讨厌！想问下如何能去掉这个提示？如何才能简单的实现生成真正的excel文件，而且能设定简单的单元格格式！
麻烦知道的指导下！谢啦！~ 有厚分奉献！~
------解决方案--------------------
------解决方案--------------------
csv格式可以用excel直接打开，而没有任何提示，不知道是否符合你的要求呢？
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