如何通过在PHP中的多维数组中提供另一个键值来返回钥匙值

Question

假设我有一个像下面的数组：

Array
(
    [0] => Array
        (
            [town_id] => 1
            [town_name] => ABC
            [town_province_id] => 7
        )
    [1] => Array
        (
            [town_id] => 2
            [town_name] => DEF
            [town_province_id] => 4
        )
    [2] => Array
        (
            [town_id] => 3
            [town_name] => GHI
            [town_province_id] => 2
        )
    )

我想在上面的数组中提供值" def"和返回值" 2"。

请帮助我。

Answer 1

您可以使用in_array获得结果。

$input = 'DEF';
foreach($array as $key=>$value){
    if(in_array($input,$value)){
          $town_id = $value['town_id'];
    }
}
print_r($town_id);

Answer 2

您可以使用array_search与array_column

$key = array_search('DEF', array_column($array, 'town_name'));

示例：

$data = array( array('town_id' => 1, 'town_name' => 'ABC'), array('town_id' => 2, 'town_name' => 'DEF') );
print_r($data);
$key = array_search('DEF', array_column($data, 'town_name'));
print_r($data[$key]['town_id']); // it will have 2

Answer 3

使用array_search和array_column

$key = array_search('DEF', array_column($your_arr, 'town_name'));
$your_arr[$key]['town_id']; // should return DEF

注意：array_column从php 5> = 5.5.0