<?php if(strlen(@$_POST['nameoftour'])) { ?>
<p>Posted variable is: <strong><?=$_POST['nameoftour'];?></strong></p>
<p>Hidden field here: <input type="hidden" name="nameoftour" value="<?=$_POST['nameoftour'];?>"/> (check source)</p>
<?php } ?>
<form action="" method="post">
<input type="text" name="nameoftour"/>
<input type="submit" value="submit"/>
</form>