Menu dynamique

Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in C:\wamp\www\internetService\menu_page2.php on line 19


    Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in C:\wamp\www\internetService\menu_page2.php on line 22

|------ 
|Colonne|Type|Null|Défaut 
|------ 
|//**id**//|int(11)|Non| 
|parent_menu|int(11)|Non| 
|menu|varchar(100)|Non| 
|url|varchar(255)|Non| 
|titre|varchar(200)|Non| 
|description|varchar(200)|Non| 
|mot_cles|varchar(200)|Non| 
== Contenu de la table menu_site 

|1|1|Accueil| | | |  
|2|1|Site manage| | | |  
|3|1|Clients| | | |  
|4|1|Agents| | | |  
|5|1|Myaccount| | | |  
|6|2|Nouveau site| | | |  
|7|2|Afficher Site| | | |  
|8|2|Paramèttre Site| | | |  
|9|2|Tous les clients| | | |  
|10|2|Recemments ajouter| | | |  
|11|2|Nouveau client| | | |  
|12|2|Paramèttre client| | | |  
|13|2|Liste Agents| | | |  
|14|2|Modifier agent| | | |  
|15|2|Ajouter agent| | | |  
|16|2|Modifier infos| | | |  
|17|2|Afficher infos| | | |  
|18|2|Supprimer compte| | | |  

<?php  
// information pour la connection à le DB 
$host = 'localhost'; 
$user = 'root'; 
$pass = ''; 
$db = 'cybernetdata';  
// connection à la DB 
$link = mysql_connect ($host,$user,$pass) or die ('Erreur : '.mysql_error() ); 
mysql_select_db($db) or die ('Erreur :'.mysql_error());  

$query = "SELECT * FROM 'menu_site' WHERE parent_menu=0";   
 $result = mysql_query($query);  
   $n1=mysql_num_rows($result); 
 $i=0;   
echo '<ul>'; 
while ($row = mysql_fetch_array($result)) {    
   $sql = "SELECT * FROM 'menu_site' WHERE id_parent =".$row['menu']."";   
   $sousmenu = mysql_query($sql);  
   $n2=mysql_num_rows($sousmenu); 
   echo($i!=1)? '<li>':'<li  class="last">'; 
   if($n2>0){ 
   echo'<a href="'.$row['url'].'" class="parent"><span>'.$row['menu'].'</span></a>'; 
 echo'<div class="columns two">'; 
  echo '<ul class="one">'; 
   while ($ssmenu = mysql_fetch_array($sousmenu)) {   
   echo '<li><a href="'.$ssmenu['url'].'"><span>'.$ssmenu['menu'].'</span></a></li>';   
  } 
  echo '</ul>';   
 echo '</div>'; 
 } 
 else{ 
 echo ' <a href="'.$row['url'].'"><span>'.$row['menu'].'</span></a>'; 
 } 
 echo '</li>'; 
$i++; 
} 
echo '</ul>';   
?>