Finding Extension of uploaded file (PHP) [duplicate]

Answer 1

$name = $_FILES["file"]["name"];
$ext = end((explode(".", $name))); # extra () to prevent notice

echo $ext;

Answer 2

Yes you can use $_FILES['file']['name'] to get the original name of the uploaded file. Just keep in mind that the extension may not always represent the real contents of the file.

Answer 3

Yes, assuming it's accurately named. It will retain its original name and extension.

Answer 4

You could use pathinfo():

$path_parts = pathinfo($_FILES["file"]["name"]);
$extension = $path_parts['extension'];