Php/docs/splfileinfo.getextension
来自菜鸟教程
SplFileInfo::getExtension
(PHP 5 >= 5.3.6, PHP 7)
SplFileInfo::getExtension — Gets the file extension
说明
public SplFileInfo::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
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