DirectoryIterator::getExtension

(PHP 5 >= 5.3.6, PHP 7, PHP 8)

DirectoryIterator::getExtension — Gets the file extension

说明

public DirectoryIterator::getExtension ( ) : string

Retrieves the file extension.

参数

此函数没有参数。

返回值

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

范例

示例 #1 DirectoryIterator::getExtension() example

<?php

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

?>

以上例程的输出类似于：

php
txt
jpg
gz

注释

注意:

Another way of getting the extension is to use the pathinfo() function.

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

参见