<?php
if($_FILES['file']['size'] > 0){
    if(move_uploaded_file($_FILES['file']['tmp_name'],"uploads/".$_FILES['file']['name'])){
       echo 'File uploaded';
    }
}
?>

<form action="" method="post" enctype="multipart/form-data">
     <input type="file" name="file" /> <input type="submit" value="Upload file" />
</form>