Question

我有一个以下格式的多维数组。我尝试做什么我得到未定义的偏移误差或重复的数组单元格。

arr[] = Array
            (
            [0] => Array
                    (
                   [grp1] = A
                   [grp2]=Array(
                        [0] => a
                        [1] => b
                        [2] => c

                    )
              )
           [1] => Array
                    (
                   [grp1] = B
                   [grp2]=Array(
                        [0] => d
                        [1] => e

                    )
                  )
              )

我想将上面的数组转换为以下格式。

arr[] = Array
            (
            [0] => Array
                    (
                   [grp1] = A
                   [grp2]=a

                    )

           [1] => Array
                    (
                   [grp1] = A
                   [grp2]=b

                    )

             [2] => Array
                    (
                   [grp1] = A
                   [grp2]=c

                    )

           [3] => Array
                    (
                   [grp1] = B
                   [grp2]=d

                    )
          [4] => Array
                    (
                   [grp1] = B
                   [grp2]=e

                    )
           )

首先抱歉我的问题没有得到很好的解释。实际上我不知道在这种情况下要问什么。任何修改都将受到赞赏。

Answer 1

我通常不会对这样简单的事情给出完整的答案，但此刻我没有太多其他事情要做。我没有在散文中解释代码，而是对所有陈述进行了评论：

// Create a new array to hold the modified values
$newArr = array();

// Go over each item
foreach ($arr as $item) {

    // Grab the uppercase letter
    $uppercaseLetter = $item['grp1'];

    // Go over the lowercase letters
    foreach ($item['grp2'] as $lowercaseLetter) {

        // Combine the uppercase and lowercase letters
        // into a new array
        $newArr[] = array(
            'grp1' => $uppercaseLetter,
            'grp2' => $lowercaseLetter,
        );
    }
}
// Show the new array
var_dump($newArr);

Answer 2

$array = array();
foreach($arr as $v){
    foreach($v['grp2'] as $val){
        $array[] = array('grp1' => $v['grp1'], 'grp2' => $val);
    }
}
print_r($array);

Answer 3

<?php
$temp = array();
$i= 0;        
foreach($arr as $key=>$value){

foreach($value["grp2"] as $key2=>$value2){
$temp[$i]["grp1"] = $value["grp1"];
$temp[$i]["grp2"] = $value2;
++$i;

}

}

print_r ($temp);
?>

结果：

Array ( 
[0] => Array ( [grp1] => A [grp2] => a ) 
[1] => Array ( [grp1] => A [grp2] => b ) 
[2] => Array ( [grp1] => A [grp2] => c ) 
[3] => Array ( [grp1] => B [grp2] => d ) 
[4] => Array ( [grp1] => B [grp2] => e ) )

如何将数组格式从一个多维形式更改为另一个？

3 个答案: