如何在PHP中获取文件扩展名? [英] How to get the file extension in PHP?

问题描述

我希望获取要上传的图像的文件扩展名，但我只获得了一个数组.

I wish to get the file extension of an image I am uploading, but I just get an array back.

$userfile_name = $_FILES['image']['name'];
$userfile_extn = explode(".", strtolower($_FILES['image']['name']));

有没有办法直接获得扩展名?

Is there a way to just get the extension itself?

推荐答案

无需使用字符串函数.您可以使用实际为您想要的东西而设计的东西: pathinfo() :

No need to use string functions. You can use something that's actually designed for what you want: pathinfo():

$path = $_FILES['image']['name'];
$ext = pathinfo($path, PATHINFO_EXTENSION);

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