PHP数组的键值组成新数组

 $jisuand是数组：      
 array(2) { ["1. 1+1=?"]=> string(3) "A.2" ["2. 1+2=?"]=> string(3) "A.2" } 


           foreach ($jisuand as $k4=>$v4) {
                  $kk4[]=$k4;
                  $vv4[]=$v4;
               }
//运行之后
 $kk4：
array(2) { [0]=> string(8) "1. 1+1=?" [1]=> string(8) "2. 1+2=?" }
$vv4：
array(2) { [0]=> string(3) "A.2" [1]=> string(3) "A.2" }


               for ($g = 0; $g < count($kk4); $g++) {
                     $jisuandati[$g]['timu'] = $kk4[$g];
                    $jisuandati[$g]['daan'] =$vv4[$g];
                  
                }

//运行之后：
array(2) { [0]=> array(2) { ["timu"]=> string(8) "1. 1+1=?" ["daan"]=> string(1) "A" } [1]=> array(2) { ["timu"]=> string(8) "2. 1+2=?" ["daan"]=> string(1) "A" } }