<?php
ini_set("memory_limit","12M");
?>

<form action="<?=$PHP_SELF?>" method="post" enctype="multipart/form-data" id="myForm" class="uniForm">
        <input name="new_file" id="new_file" type="file" />
        <button name="submit" type="submit">Upload file</button>
</form>
<?php
        if(!empty($_POST['submit'])){
      
      echo "The form was sent<br />";
      
          if (isset ($_FILES['new_file'])){
       
   echo "The file was attached<br />";
       
              $filename = $_FILES['new_file']['name'];
          
   echo $filename."<br />";
          
              $source = $_FILES['new_file']['tmp_name'];

              $target = "files/".$filename;
          
              if(move_uploaded_file($source, $target)) {
              echo "The file was uploaded";
           }   else {
              echo "The file was NOT uploaded";
           }

          }
        }
?>