使用php检查文件是否是kml文件

Question

I am using move_file_upload on my server side in php so that client can allow users to upload their kml files to the server. I know that in order to check an image , in php I can use $check = getimagesize(file) but what would be the equivalent for a kml file check ?

I donot want to just check the extension of the file. I wish to know if infact the file is a valid kml file or not. If I only check the extension, someone can just post some other malicious file and change its extension to .kml

Answer 1

If you want to see if the file has the extension KML, you can use:

$filename = $_FILES["file"]["name"]; //or however you are getting the filename
$ext = end((explode(".",$filename)));

if($ext!="kml"){
    //Extension is incorrect
}