PHP - Manual: SplFileInfo::getExtension
2024-12-20
(PHP 5 >= 5.3.6, PHP 7, PHP 8)
SplFileInfo::getExtension — Gets the file extension
Retrieves the file extension.
此函数没有参数。
Returns a string containing the file extension, or an empty string if the file has no extension.
示例 #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"
注意:
Another way of getting the extension is to use the pathinfo() function.
<?php
$extension = pathinfo($info->getFilename(), PATHINFO_EXTENSION);
?>
官方地址:https://www.php.net/manual/en/splfileinfo.getextension.php