我已经从 PHP 和 MySQL 导出了 600MB+ 大小的 csv 文件，这与您没有问题的方式类似.听起来像是您的环境设置有问题，而不是代码或技术限制.

I have exported 600MB+ sized csv files from PHP and MySQL in a similar way that you are with no issues. Sounds like a problem with your environment settings - not with the code or a limitation of the technologies.