使用php操作多维数组

Question

我有以下数组:

$arr = array(
           array("2014-03-13"=>array("a"=>1,"b"=>2)),
           array("2014-03-12"=>array("a"=>4,"b"=>3))
       );

我希望它看起来更像这样。

$arr = array(0=>array("date"=>"2014-03-13","a"=>1,"b"=>2),
             1=>array("date"=>"2014-03-12","a"=>4,"b"=>3));

这是我到目前为止写的。

$keys = array();
$vals = array();
foreach($arr as $row){
   foreach($row as $key=>$val){
     $keys[]=array("date"=>$key);
     foreach($val as $keys=>$values){
        $vals[]=array($keys=>$values);
     }
   }
}

获得dates的array工作良好，因此在下面的示例中，$keys array工作，但是$vals array不按预期工作，而是给了我一个类似的数组。

Array ( [0] => Array ( [a] => 1 ) 
        [1] => Array ( [b] => 2 ) 
        [2] => Array ( [a] => 4 ) 
        [3] => Array ( [b] => 3 ) 
        [4] => Array ( [a] => 4 ) 
        [5] => Array ( [b] => 3 ) ) 

Answer 1

应该是

$result = array();
foreach($arr as $row) {
    foreach($row as $date=>$values) {
        $values['date'] = $date;
        $result[] = $values;
    }
}

Answer 2

$arr = array(
    array(
        "2014-03-13" => array("a"=>1, "b"=>2)
    ),
    array(
        "2014-03-12" => array("a"=>4, "b"=>3)
    ),
);

$result = array();
foreach ($arr as $item) {
    foreach ($item as $date => $values) {
        $result[] = array_merge(array('date' => $date), $values);
    }
}
var_dump($result);

Answer 3

        Here is the code:
   $arr = array(
         0=>array("2014-03-13"=>array("a"=>1,"b"=>2)),
           array("2014-03-12"=>array("a"=>4,"b"=>3))
       );
$finalarray=array();
foreach($arr as $k=>$v){    
    foreach($v as $kk=>$vv){
        $newarray=array();
        $newarray["date"]=$kk;
        foreach($vv as $kkk=>$vvv){
            $newarray[$kkk]=$vvv;
        }

    }
    $finalarray[]=$newarray;
}
echo "<pre>";
print_r($finalarray);
echo "</pre>";
        **Here is the output:**
        Array
        (
            [0] => Array
                (
                    [date] => 2014-03-13
                    [a] => 1
                    [b] => 2
                )
            [1] => Array
                (
                    [date] => 2014-03-12
                    [a] => 4
                    [b] => 3
                )
        )