How to get the extension using php's pathinfo function

The extension is the string after the last (.) in the file path. The pathinfo function can be used to return the file path information, so this article will introduce to you how to obtain the extension by the pathinfo function in PHP.

How to use the pathinfo function

Use the pathinfo function to return information about the file path.

mixed pathinfo ( string $path [, int $options = PATHINFO_DIRNAME | PATHINFO_BASENAME | PATHINFO_EXTENSION | PATHINFO_FILENAME ] )

In path, specify the path to be checked.

In options, you can use constants to specify the elements to be returned. If not specified, all elements are returned.

If options are omitted, the return value is an associative array containing PATHINFO_DIRNAME, PATHINFO_BASENAME and PATHINFO_EXTENSION or PATHINFO_FILENAME. To get the extension, the key will get the value of the extension element.

If only PATHINFO_EXTENSION is specified in options, you can only get the extension string.

Let’s look at a specific example

Get the file path extension through the pathinfo function.

The code is as follows

        

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The execution result is displayed as follows:

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