php如何获取二维数组指定的某个字段的值

<br />$arr = array("net" => array(<br />                                       "find" => array("marks"=>"1234","name"=>"lisi"),<br />                                       "add" => array("marks"=>"12","name"=>"lisi2"),<br />                                       "up" => array("marks"=>"15","name"=>"lisi3"),<br />                                       "del" => array("marks"=>"9","name"=>"lisi4")<br />                               ),<br />                           "login" => array(<br />                                      "find" => array("marks"=>"16661","name"=>"lisi5"),<br />                                      "add" => array("marks"=>"18881","name"=>"lisi6")<br />                               )<br />                          );<br /><br />

$v = end($arr['net']);<br />$k = key($arr['net']);<br />echo $k;<br />print_r($v);