Php

voici un bout de code dans j'ai un probleme
$type = array(
'Single' => array(
'nbr_adulte' => array(),
'nbr_enfant' => array()
),
'Double' => array(
'nbr_adulte' => array(),
'nbr_enfant' => array()

),
'Triple' => array(
'nbr_adulte' => array(),
'nbr_enfant' => array()
)
);
$index=array('Single'=>'0','Double'=>'0','Triple'=>'0');
$nbr_adulte=0;
$nbr_enfant=0;
$liste="";
$nombre_rooms=$_POST["chambre"];
for($j=1; $j<=$nombre_rooms; $j++)
{
$nbr_adulte=$_POST["abode".$j."1"];
$nbr_enfant=$_POST["abode".$j."8"];
$nbr_perso=$nbr_adulte+$nbr_enfant;
for($k=1; $k<=$j; $k++)
{
$enf=$_POST['abode'.$j.'8'.$k.''];
$liste.=$_POST['abode'.$j.'8'.$k.''];
if($k!=$j)
{
$liste.=":";
}
}
if($nbr_perso==1)
{
$index['Single']+=1;
next($type['Single']['nbr_adulte']);
array_push($type['Single']['nbr_adulte'],$nbr_adulte);
next($type['Single']['nbr_enfant']);
array_push($type['Single']['nbr_enfant'],$nbr_enfant);
}

if($nbr_perso==2)
{
$index['Double']+=1;
next($type['Double']['nbr_adulte']);
array_push($type['Double']['nbr_adulte'],$nbr_adulte);
next($type['Double']['nbr_enfant']);
array_push($type['Double']['nbr_enfant'],$nbr_enfant);
}
if($nbr_perso>2)
{
$index['Triple']+=1;
next($type['Triple']['nbr_adulte']);
array_push($type['Triple']['nbr_adulte'],$nbr_adulte);
next($type['Triple']['nbr_enfant']);
array_push($type['Triple']['nbr_enfant'],$nbr_enfant);
}
$liste="";
}
foreach($type as $cle => $valeur)
{
$nbr_chambre=$index[$cle];
for($i=0;$i<$nbr_chambre;$i++)
{
$nbr_adulte=${$type}[${$cle}]['nbr_adulte'][$i];
$nbr_enfant=${$type}[${$cle}][${$cle}][$i];
}
}
j'ai un erreur :
Fatal error: Cannot use string offset as an array
quelqu'un peut m'aider