Hi, I have come up with the following code, that uploads gif images to the server. How do I allow only MP3 files to be uploaded, and also store the path of the image in a database?

Code:
<?php
if (($_FILES["file"]["type"] == "image/gif")
&& ($_FILES["file"]["size"] < 20000))
{
  if ($_FILES["file"]["error"] > 0)
  {
    echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
  }
  else
  {
    echo "Upload: " . $_FILES["file"]["name"] . "<br />";
    echo "Type: " . $_FILES["file"]["type"] . "<br />";
    echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
    echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />";

    if (file_exists("upload/" . $_FILES["file"]["name"]))
    {
      echo $_FILES["file"]["name"] . " already exists. ";
    }
    else
    {
      move_uploaded_file($_FILES["file"]["tmp_name"],
      "upload/" . $_FILES["file"]["name"]);
      echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
    }
  }
}
else
{
  echo "Invalid file";
}
?>