<?PHP
while($myrow = pg_fetch_assoc($result)) {
  $nameofmenu = $myrow[name];
  echo $nameofmenu; //It prints correctly the name of the menu
  echo '<form name"formname" method="post" action="resultsmenu.php">';
 echo "<input type='hidden' name='menuname' value=' $nameofmenu ' />";
 echo "<input type='submit' name='submit' value='See Menu' />";
}
?>

<?php
  $nameofmenu = $_POST['menuname'];
  $db = pg_connect('host=localhost dbname=test user=myuser password=mypass');

    $query = "SELECT * FROM menu where name='$nameofmenu'";
    $result = pg_query($query);
    if (!$result) {
        echo "Problem with query " . $query . "<br/>";
        echo pg_last_error();
        exit();
    }
    $myrow = pg_fetch_assoc($result);
    $description = $myrow[description];
 ?>

$nameofmenu2 = "Menu3";
$nameofmenu = $_POST['menuname']; //where the value in menuname is Menu3
 if ($nameofmenu2 = $nameofmenu){echo "Both variables are the same";}