SplFileInfo::getExtension()

(PHP 5 >= 5.3.6, PHP 7)

Gets the file extension

说明

publicSplFileInfo::getExtension(void): 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

SplFileInfo::getExtension() example

<?php
$info = new SplFileInfo('foo.txt');
var_dump($info->getExtension());
$info = new SplFileInfo('photo.jpg');
var_dump($info->getExtension());
$info = new SplFileInfo('something.tar.gz');
var_dump($info->getExtension());
?>

以上例程会输出：

string(3) "txt"
string(3) "jpg"
string(2) "gz"

注释

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 $extension = pathinfo($info->getFilename(), PATHINFO_EXTENSION); ?>

参见

• SplFileInfo::getFilename() Gets the filename
• SplFileInfo::getBasename() Gets the base name of the file
• pathinfo()返回文件路径的信息