数组遍历问题。

$arr = array(	'userId'=>array(1,2,3),	'username'=>array('Tom','Rose','Ben'),	'sex'=>array('男','女','男'));

  $arr2 =array(       array('userId'=>1,'username'=>'Tom','sex'=>'男'),       array('userId'=>2,'username'=>'Rose','sex'=>'女'),       array('userId'=>3,'username'=>'Ben','sex'=>'男')   ); 

$arr = array(    'userId'=>array(1,2,3),    'username'=>array('Tom','Rose','Ben'),    'sex'=>array('男','女','男'));foreach($arr as $k=>$item) {  foreach($item as $i=>$v) $res[$i][$k] = $v;}print_r($res);

Array(    [0] => Array        (            [userId] => 1            [username] => Tom            [sex] => 男        )    [1] => Array        (            [userId] => 2            [username] => Rose            [sex] => 女        )    [2] => Array        (            [userId] => 3            [username] => Ben            [sex] => 男        ))