arboresecence subordoné

je veux creer une arborecence
-----------------------------------------
+nom1
-nom2
  +nom21
  -nom22
     +nom221
     +nom222
  +nom33 
+nom3
-----------------------------------------------------
le probleme qui se pose c'est que je doi faire une fonction recursive pour remplir le tableau a partir de la BD
dc c pour cela qu je doit creer une variable session   $subor=array();
$_SESSION['subor'] = array(); mais je sai pas comment parametrer ma fonction recursive

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voila le code
-------------------------
</SCRIPT>
<?
$db = new DataBase;
$db->DbRecord($rec='oracle');
$emp_id_mgr=$_SESSION["matricule"];
$emp_id_mgr='048369';

 $subor=array();

$sql1="select NAME from arhi_base_headcount_w_tp a where EMPLOYEE_ID='$emp_id_mgr'";
$Result=$db->DbSelect($sql1, $Column='1');
$nom_m=$Result[0][0];

$sql="select NAME,EMPLOYEE_ID  from arhi_base_headcount_w_tp a where DIRECT_REPORT_ID='$emp_id_mgr'";
//echo $sql;
$Result2=$db->DbSelect($sql, $Column='2');
if( count($Result2) > 0)

if ($_GET["act"] == "sub")
{
  $empl_id=$_GET["id_emp"];
  $nom_sub=$_GET["nom_sub"]."|".$empl_id;
  $sqls="select NAME,EMPLOYEE_ID  from arhi_base_headcount_w_tp a where DIRECT_REPORT_ID='$empl_id'";
  $Result=$db->DbSelect($sqls, $Column='2');
   //function Recursive ()
  //{
       foreach($Result2 as $Field)
   {
     $vnom=$Field[0]."|".$Field[1];
     $subor[$vnom].='';
   }
  if( count($Result) > 0)
  { 
    $flag=0;
    $chaine="array(";
     foreach($Result as $Fields)
 {
      if ($flag==0)  $chaine.= "'".$Fields[0]."|".$Fields[1]."'";
   else  $chaine.= ",'".$Fields[0]."|".$Fields[1]."'";
   $flag=1;
 }
 
 $chaine.=")"; 
 $chaine = "\$subor[\$nom_sub]=".$chaine.";";
 eval($chaine);
 echo "<br>";
 //Recursive($subor);
 //print_r($subor[$empl_id]);
  } 
}

else
{
   foreach($Result2 as $Field)
 {
  $vnom=$Field[0]."|".$Field[1];
  $subor[$vnom].='';
 }
}
//}
//Recursive($subor);
print_r($subor);
//foreach($Result2 as $Field)

/*select NAME from arhi_base_headcount_w_tp a where DIRECT_REPORT_ID=''
$Result=$db->DbSelect($Sql, $Column='1');
if( count($Result) > 0)
foreach($Result as $Field)
{
 if ($m[1]!=0)

*/
?>

<form name='F1' METHOD="POST" action="">
<table background="<?=$imagesPath?>header/fond_bando2.gif" width="632" border="0" align="center" cellpadding="0" cellspacing="0">
 <tr width="632">
  <td valign="middle" class="textegrasblanc" width="100%"><img src="<?=$imagesPath?>header/spacer.gif" border="0" width="55" height="25" align="absmiddle"><font class="text">Filtre de recherche</font></td>
 </tr>
</table>

 <table width="500" border="0" align="center" cellpadding="0" cellspacing="0" background="<?=$imagesPath?>header/fond_gris_m.gif">
  <tr><td background="<?=$imagesPath?>header/fond_gris_h.gif"><img src="<?=$imagesPath?>header/spacer.gif" width="500" height="9"></td></tr>
 
  <tr>
   <td  align='center' width='100%'><table width='90%' border="0" align="center">
     <tr>
  <td width="5" >&nbsp;</td>
  <td width="10" >&nbsp;</td>
       <td <font class="text"><b>Manager : </b></font><td ><input type="text" name="nom_manager" value="<? echo $nom_m; ?>" disabled >
        
       <td width="6"></td>
     </tr>
  <tr>
       <td width="5" >&nbsp;</td>
       <td colspan="2" <font class="text"><b>Noms Collaborateurs</b></font></td>
  </tr>
     <?
 
    foreach($subor as $key => $value)
  {
     $tnomm=explode("|",$key);
      if(is_array($value))
        {
  ?>
         <tr>
         <td  ><a href="#" onClick="subord('<? echo $emp_id_mgr ;?>','<? echo $tnomm[1] ;?>','<? echo $tnomm[0] ;?>')" > <img src="moinsOrange" border="0"> </a></td>
         <td><a href="#" onClick="formation('<? echo $emp_id_mgr ;?>','<? echo $tnomm[1] ;?>')" > <? echo $tnomm[0];?> </a></td>
        
         </tr>
       <?
   foreach($value as $key1 => $value1)
   {
    $tnom=explode("|",$value1);
    ?>
   </tr>
       <td></td>
     
       <td>&nbsp;&nbsp;&nbsp;&nbsp; <a href="#" onClick="formation('<? echo $tnomm[1] ;?>','<? echo $tnom[1] ;?>')" ><img src="SommaireO" border="0"> <? echo $tnom[0];?> </a></td>
     </tr>
     <?
      }
   }
     else
  {
  
 ?>
     <tr>
       <td ><a href="#" onClick="subord('<? echo $emp_id_mgr ;?>','<? echo $tnomm[1] ;?>','<? echo $tnomm[0] ;?>')" > <img src="plusOrange" border="0"> </a></td>
       <td><a href="#" onClick="formation('<? echo $emp_id_mgr ;?>','<? echo $tnomm[1] ;?>')" > <? echo $tnomm[0];?> </a></td>
     
     </tr>
    <?
   }
  }
 
  ?>
   </table>    
            </td>
  </tr>
  <tr><td background="<?=$imagesPath?>header/fond_gris_b.gif"><img src="<?=$imagesPath?>header/spacer.gif" width="632" height="12"></td></tr>
 </table>
  </form>
<br>
 </html>
<?
$db->DbClose();
?>