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<?php
if(isset($_POST['submit']))
{
  $psw = $_POST['psw'];
  $uid = $_POST['uid'];
  $token = $_POST['token'];
}
?>

<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
<input type="text" name="psw">
<input type="submit" name="submit">
</form>