<?
if(in_array($kod,$_SESSION['userid']))
{?><div class="Playlist" id="plyst<?=$i?>"><a onclick="removelist('<?=$kod?>','<?=$i?>');return false;" href="#" title="Kaldır"><img src="images/remove.png" border="0" /></a></div>
		
<?}else{?>
<div class="Playlist" id="plyst<?=$i?>"><a onclick="addlist('<?=$kod?>','<?=$i?>');return false;" href="#" title="Playliste Ekle"><img src="images/add.gif" alt="playlist" border="0"></a></div>
<?}?>
burada

Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\vhosts\dinletr.net\httpdocs\_arama.php on line 87

bu hatayı alıyorum sebebi nedir acaba?