Answers for "how to return uploaded file type in php"

php get uploaded file extension

$ext = pathinfo($_FILES["file"]["name"], PATHINFO_EXTENSION);

check what kind of file was uploaded php

$allowed = array('gif', 'png', 'jpg');
$filename = $_FILES['video_file']['name'];
$ext = pathinfo($filename, PATHINFO_EXTENSION);
if (!in_array($ext, $allowed)) {
    echo 'error';
}