Не срабатывает условие

$zagon_user_id = $_SESSION['idlog'];
$result = mysql_query("SELECT * FROM zagons WHERE 'user_id'='zagon_user_id' AND 'zagon_type'='1'");
$myrow = mysql_fetch_array($result);
if(isset($myrow['zagon_position']))
{
if($myrow['zagon_position']=='1')
}
echo "<div class='pole_img' style='top: 0px; left: 154px;'><img src='css/images/kuriatnik.png'></div>";
}
}
else
{
echo "<div class='pole_img' style='top: 0px; left: 154px;'><img src='css/images/pole.png'></div>";
}

$zagon_user_id = $_SESSION['idlog'];
$result = mysql_query("SELECT * FROM zagons WHERE 'user_id'='zagon_user_id' AND 'zagon_type'='1'");
$myrow = mysql_fetch_array($result);
if(isset($myrow['zagon_position']) && $myrow['zagon_position']=='1') {
  echo "<div class='pole_img' style='top: 0px; left: 154px;'><img src='css/images/kuriatnik.png'></div>";
}else
{ echo "<div class='pole_img' style='top: 0px; left: 154px;'><img src='css/images/pole.png'></div>";
}

$result = mysql_query("SELECT * FROM zagons WHERE 'user_id'='$zagon_user_id' AND 'zagon_type'='1'");

WHERE 'user_id'='$zagon_user_id' AND 'zagon_type'='1'

if(isset($myrow['zagon_position']) && $myrow['zagon_position']=='1') 
{
echo "<div class='pole_img' style='top: 0px; left: 154px;'><img src='css/images/kuriatnik.png'></div>";
}
else
{ 
echo "<div class='pole_img' style='top: 0px; left: 154px;'><img src='css/images/pole.png'><form action='#' method='get'><input class='text_link' type='submit' value='Добавить'></form></div>";
}

$result = mysql_query("SELECT * FROM `zagons` WHERE `user_id`='zagon_user_id' AND `zagon_type`='1'");

$result = mysql_query("SELECT * FROM `zagons` WHERE `user_id`='zagon_user_id' AND `zagon_type`='1'") or die("Ошибка выборки".mysql_error());

ORDER BY  `id` DESC //или как то так при выборке из таблицы

 $row = mysql_fetch_assoc($select);
 if(!empty($row['id']))
    {
    // вывод одной картинки
    }
  else {// вывод другой}

var_dump($row);