php file mime type validation before upload

upload_valid.php

<?php

$finfo = finfo_open(FILEINFO_MIME_TYPE);
$fileMime = finfo_file($finfo, $file["tmp_name"]);
finfo_close($finfo);

if($fileMime === "image/jpeg" || $fileMime === "image/png"){
	// upload
}else{
	echo "Wrong file format";
	return;
}