当我有一个数组的唯一值时，如何从关联数组中获取数组的其他元素[关闭]

Question

Array
(
    [0] => Array
        (
            [id] => 61
            [title] => werwer
        )

    [1] => Array
        (
            [id] => 63
            [title] => test
        )

    [2] => Array
        (
            [id] => 88
            [title] => test 2
        )
)

How can I get title which has id=63 in above type of array without looping.

Answer 1

Actually, you can't do that without looping. That doesn't mean you have to use loop (foreach/while e t.c.) - but using array functions you will internally iterate array in any case.

For example, in PHP 5.5 that is:

$array = [
['id'=>63, 'title'=>'foo'],
['id'=>65, 'title'=>'bar']
];
//use this - if there are more than 2 connected to `id` fields:
$ids    = array_flip(array_column($array, 'id'));//here is iteration, gathering id column
$result = $array[$ids[63]]['title'];
//or else, if `title` is always the only field:
$result = array_column($array, 'title', 'id')[63];
//var_dump($result);

-and so on. array_search() with array_walk() (or similar ways) will hide iteration from you, but it will be done in any case.