php运行的几种方式
作者：zccst
最常见的方式：http方式
即用户请求url地址，访问php脚本。这也是我熟悉的方式，而且我一直以为就这一种运行方式。
今天在做数据导出的时候，由于数据量比较大，需要用脚本方式，所以才知道php还有很多其他运行方式（不通过url访问）
1，php xx.php
如果在后台运行，还可以再加&
2，cron方式
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