PHP二维数组的表格输出

<?php$arr1 = array("nokia" => array('lumia800','lumia900','lumia1520'),"apple" => array('iphone4s','iphone5c','iphone6s'),"msoft" => array('surface1','surface2','surface3'));$arr2 = array(array('lumia800','lumia900','lumia1520'),array('iphone4s','iphone5c','iphone6s'),array('surface1','surface2','surface3'));echo "<table border='1px'>";foreach($arr2 as $key=>$val){echo "<tr>";foreach($val as $detail){echo "<td>".$detail."</td>";}echo "</tr>";}echo "</table>";?>