php 二维数组,该如何处理

$ar = array (<br />  0 => array ( 'AdminName' => 'sysadm', 'MenuNo' => ''),<br />  1 => array ( 'AdminName' => '00000',  'MenuNo' => '30,27,32' ),<br />  2 => array ( 'AdminName' => '00000',  'MenuNo' => '25,26,27' ),<br />  3 => Array ( 'AdminName' => '00001',  'MenuNo' => '30,27,32' ),<br />);<br /><br />$res = array();<br />foreach($ar as $row) {<br />  if(! isset($res[$row['AdminName']])) $res[$row['AdminName']] = $row;<br />  else $res[$row['AdminName']]['MenuNo'] .= ',' . $row['MenuNo'];<br />}<br />print_r(array_values($res));

Array<br />(<br />    [0] => Array<br />        (<br />            [AdminName] => sysadm<br />            [MenuNo] => <br />        )<br /><br />    [1] => Array<br />        (<br />            [AdminName] => 00000<br />            [MenuNo] => 30,27,32,25,26,27<br />        )<br /><br />    [2] => Array<br />        (<br />            [AdminName] => 00001<br />            [MenuNo] => 30,27,32<br />        )<br /><br />)<br />