How to Extract File Extensions in PHP: Why pathinfo() is Your Best Friend

How to Retrieve File Extensions in PHP

Problem:

You aim to extract the file extension from an image upload, but you encounter an array response instead of the desired extension.

Example Code:

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

Issue:

The above code returns an array, not the sole extension.

Solution:

PHP provides a convenient function specifically designed for this purpose: pathinfo().

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

This code snippet utilizes the pathinfo() function to extract the file extension from the given file path in the $path variable. The PATHINFO_EXTENSION constant instructs the function to retrieve the extension specifically. The result is stored in the $ext variable.

The above is the detailed content of How to Extract File Extensions in PHP: Why pathinfo() is Your Best Friend. For more information, please follow other related articles on the PHP Chinese website!