SplFileInfo::getExtension

(PHP 5 >= 5.3.6)

SplFileInfo::getExtension — Gets the file extension

说明

public string SplFileInfo::getExtension ( void )

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