переменная+переменная =

$trow1 = array ("type" => "txt","name" => "mytxt","maxc" => "40","size" => "46" );
$trow2 = array ("type" => "txt","name" => "Login","maxc" => "16","size" => "46" );
$settings = array ("rows" => 3,"inline" => 2,"align" => 'Center');
for($i=1;$i<=$settings["rows"];$i++) {
echo $trow.$i["type"]; // вот как мне это решить?
}

$trow.$i
$trow[$i]
$trow = $trow.$i
$trow = '$trow'.$i; echo $trow["type"]

$trow[0] = array ("type" => "txt","name" => "mytxt","maxc" => "40","size" => "46" );
$trow[1] = array ("type" => "txt","name" => "Login","maxc" => "16","size" => "46" );
$settings = array ("rows" => 3,"inline" => 2,"align" => 'Center');
for($i=0;$i<$settings["rows"];$i++) {
    echo $trow[$i]["type"];
}

$trow1 = array ("type" => "txt","name" => "mytxt","maxc" => "40","size" => "46" );

$a1 = 'hey ';
$a2 = 'it\'s ';
$a3 = 'dinamic variable names!';
for ($i=1;$i<4;$i++)
{
echo ${'a'.$i};
}