Shulou(Shulou.com)06/03 Report--

This article mainly introduces the PHP file operation and algorithm of the implementation of the interview questions, have a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian with you to understand.

Operation file

1. Use more than 5 ways to get the extension of a file

Requirement: dir/upload.image.jpg, find .jpg or jpg

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