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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.

示例

示例 #1 DirectoryIterator::getExtension() example

<?php

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

?>

以上示例的输出类似于：

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