DirectoryIterator::getExtension

(PHP 5 >= 5.3.6, PHP 7)

Gets the file extension

public string DirectoryIterator::getExtension ( void )

Retrieves the file extension.

Returns:

Returns a string containing the file extension, or an empty string if the file has no extension.

Notes:

This method is only available as of PHP 5.3.6. Another way of getting the extension is to use the pathinfo() function.

<?php
$extension = pathinfo($fileinfo->getFilename(), PATHINFO_EXTENSION);
?>

Examples:

DirectoryIterator::getExtension() example

<?php

$directory = new DirectoryIterator(__DIR__);
foreach ($directory as $fileinfo) {
    if ($fileinfo->isFile()) {
        echo $fileinfo->getExtension() . "\n";
    }
}

?>

The above example will output something similar to:

php
txt
jpg
gz

<?php
$extension = pathinfo($fileinfo->getFilename(), PATHINFO_EXTENSION);
?>