fileinfo function PHP

Question

Can someone give me an example of how to use fileinfo, to replace a snippet of code such as:

($_FILES["fileToUpload"]["type"] == "image/gif"
|| $_FILES["fileToUpload"]["type"] == "image/jpeg"
|| $_FILES["fileToUpload"]["type"] == "image/png")

Answer 1

Using this:

$finfo = new finfo();
$fileinfo = $finfo->file($file, FILEINFO_MIME);

$fileinfo should contain the correct MIME type which you would be able to use in a snippet like that, or in a switch statement like:

switch($fileinfo) {
    case "image/gif":
    case "image/jpeg":
    case "image/png":
        // Code
        break;
}