SplFileInfo::getExtension

(PHP 5 >= 5.3.6, PHP 7)

SplFileInfo::getExtension — Gets the file extension

说明

public SplFileInfo::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

Example #1 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