update : 2015.11.03
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Gets the file extension
DirectoryIterator
PHP Manual

DirectoryIterator::getExtension

(PHP 5 >= 5.3.6)

DirectoryIterator::getExtension — Gets the file extension

설명

public string DirectoryIterator::getExtension ( void )

Retrieves the file extension.

인수

이 함수는 인수가 없습니다.

반환값

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

예제

Example #1 DirectoryIterator::getExtension() example

<?php

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

?>

위 예제의 출력 예시:

php
txt
jpg
gz

주의

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);
?>

참고

DirectoryIterator
PHP Manual