恳求帮忙，php比较两个二维数组并按键排序查出重复值。

$arr1=array(<br />
   0=>array('pid'=>1,'name'=>'user1'),<br />
   1=>array('pid'=>2,'name'=>'user2')<br />
);<br />
<br />
$arr2=array(<br />
   0=>array('pid'=>3,'name'=>'user1'),<br />
   1=>array('pid'=>4,'name'=>'user4')<br />
);<br />
<br />
$t = array();<br />
foreach(array_merge($arr1, $arr2) as $v) {<br />
  if(isset($t[$v['name']])) {<br />
    if($t[$v['name']]['pid'] > $v['pid']) $t[$v['name']]['name'] = "user{$v['pid']}";<br />
    else $v['name'] = "user{$v['pid']}";<br />
  }<br />
  $t[$v['name']] = $v;<br />
}<br />
print_r($t);

Array<br>
(<br>
    [user1] => Array<br>
        (<br>
            [pid] => 1<br>
            [name] => user1<br>
        )<br>
<br>
    [user2] => Array<br>
        (<br>
            [pid] => 2<br>
            [name] => user2 <div class="clear">
                 
              
              
        
            </div>