(PHP 5 >= 5.3.6, PHP 7)
DirectoryIterator::getExtension — Gets the file extension
public DirectoryIterator::getExtension ( ) : string
Retrieves the file extension.
This function has no parameters.
Returns a string containing the file extension, or an empty string if the file has no extension.
Example #1 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
Note:
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); ?>
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https://www.php.net/manual/en/directoryiterator.getextension.php