php - 如何重新索引多维数组的所有子数组元素？

Question

问题是如何为数组重置密钥：

Array ( 
    [1_Name] => Array ( 
        [1] => leo 
        [4] => NULL 
    ) 
    [1_Phone] => Array ( 
        [1] => 12345 
        [4] => 434324
    )  
)

重置为：

Array ( 
    [1_Name] => Array ( 
        [0] => leo 
        [1] => NULL 
    ) 
    [1_Phone] => Array ( 
        [0] => 12345 
        [1] => 434324
    ) 
)

Answer 1

重置数组中所有数组的键：

$arr = array_map('array_values', $arr);

如果您只想重置第一级数组键，请使用array_values()不带array_map.

Answer 2

$array[9] = 'Apple';
$array[12] = 'Orange';
$array[5] = 'Peach';

$array = array_values($array);

通过此功能，您可以重置您的阵列

$array[0] = 'Apple';
$array[1] = 'Orange';
$array[2] = 'Peach';

Answer 3

用于array_values重置密钥

foreach($input as &$val) {
   $val = array_values($val);
}

http://php.net/array_values

Answer 4

在这里，您可以看到deceze提供的方式与简单array_values方法之间的区别：

数组：

$array['a'][0] = array('x' => 1, 'y' => 2, 'z' => 3);
$array['a'][5] = array('x' => 4, 'y' => 5, 'z' => 6);

$array['b'][1] = array('x' => 7, 'y' => 8, 'z' => 9);
$array['b'][7] = array('x' => 10, 'y' => 11, 'z' => 12);

顺便说一下，这deceze是您的输出：

$array = array_map('array_values', $array);
print_r($array);

/* Output */

Array
(
    [a] => Array
        (
            [0] => Array
                (
                    [x] => 1
                    [y] => 2
                    [z] => 3
                )
            [1] => Array
                (
                    [x] => 4
                    [y] => 5
                    [z] => 6
                )
        )
    [b] => Array
        (
            [0] => Array
                (
                    [x] => 7
                    [y] => 8
                    [z] => 9
                )

            [1] => Array
                (
                    [x] => 10
                    [y] => 11
                    [z] => 12
                )
        )
)

如果您只使用array_values函数，这是您的输出：

$array = array_values($array);
print_r($array);

/* Output */

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [x] => 1
                    [y] => 2
                    [z] => 3
                )
            [5] => Array
                (
                    [x] => 4
                    [y] => 5
                    [z] => 6
                )
        )
    [1] => Array
        (
            [1] => Array
                (
                    [x] => 7
                    [y] => 8
                    [z] => 9
                )
            [7] => Array
                (
                    [x] => 10
                    [y] => 11
                    [z] => 12
                )
        )
)

Answer 5

$result = ['5' => 'cherry', '7' => 'apple'];
array_multisort($result, SORT_ASC);
print_r($result);

数组（ [0] => 苹果 [1] => 樱桃）

//...
array_multisort($result, SORT_DESC);
//...

数组（ [0] => 樱桃 [1] => 苹果）

Answer 6

为此存在 PHP 本机函数。见http://php.net/manual/en/function.reset.php

只需这样做：mixed reset ( array &$array )