请问一个数据格式转换

<br />array(5) {<br />  [0]=><br />  string(3) "0:3"<br />  [1]=><br />  string(3) "1:6"<br />  [2]=><br />  string(3) "2:9"<br />  [3]=><br />  string(3) "3:2"<br />  [4]=><br />  string(3) "4:4"<br />}<br />

<br />array(5) {<br />  0=>3,<br />  1=>6,<br />  2=>9,<br />  3=>2,<br />  4=>4<br />}<br /><br />

$ar = array('0:3', '1:6', '2:9', '3:2', '4:4');<br /><br />foreach($ar as $v) {<br />  $t = explode(':', $v);<br />  $res[$t[0]] = $t[1];<br />}<br /><br />print_r($res);