PHP Use array map to reOrder an array

问题

I need to reOrder this array with one function.

From (My actual array):

array:2 [▼
  0 => array:2 [▼
    "way" => 0
    "period" => "MONTH"
  ]
  1 => array:2 [▼
    "way" => 1
    "period" => "3MONTHS"
  ]
]

To (I would like this array):

array:2 [▼
  0 => array:1 [▼
    "MONTH" => 0
  ]
  1 => array:1 [▼
    "3MONTHS" => 1
  ]
]

Can I do that with array_map() function?

回答1:

You can simply use foreach instead like as

foreach($your_arr as &$v){
    $v = [$v["period"] => $v["way"]];
}
print_r($your_arr);

Or using array_map

$your_arr = array_map(function($v){ return [$v["period"] => $v["way"]]; },$your_arr);
print_r($your_arr);

回答2:

Use array_column() as

$data = array_column($array, 'way','period');

That convert period as key and way as its value

来源：https://stackoverflow.com/questions/38263969/php-use-array-map-to-reorder-an-array