闲者博客 - 后缀
https://bk1314.com/tag/%E5%90%8E%E7%BC%80/
-
PHP获取文件扩展名（后缀）
https://bk1314.com/37.html
2022-02-25T18:49:56+08:00
function getExtension($filename){
$myext = substr($filename, strrpos($filename, '.'));
return str_replace('.','',$myext);
}
$filename = '我的文档.doc';
echo getExtension($filename);