PHP - Get key value from other key - php

Question

I have the following array:
$array = Array(
"0" => Array (
"id" => 1081,
"name" => "John"
),
"1" => Array (
"id" => 1082,
"name" => "Matt"
),
"2" => Array (
"id" => 1083,
"name" => "Roger"
)
);
Is there anyway I can get name if I only know the id but without having to iterate through the array?

Answer 1

For PHP >= 5.5.0:
$id = 1082;
$result = array_column($array, 'name', 'id')[$id];
As Barmar points out, to get an array that is easy to use with id as the index:
$id = 1082;
$result = array_column($array, 'name', 'id');
echo $result[$id];

Answer 2

You can make an associative array that refers to the same elements, then use that:
function make_assoc(&$array, $keyname) {
$new_array = array();
foreach ($array as &$elt) {
$new_array[$elt[$keyname]] = $elt;
}
return $new_array;
}
$assoc_array = make_assoc($array, 'id');
Now you can use $assoc_array[1083] to access the third item in the original array. And since this returns an array of references, modifying that will also modify the element of the original array.

Answer 3

You can use array_map to search into your array if your PHP < 5.5.0 and you don't have array_column:
<?php
$array = Array(
"0" => Array (
"id" => 1081,
"name" => "John"
),
"1" => Array (
"id" => 1082,
"name" => "Matt"
),
"2" => Array (
"id" => 1083,
"name" => "Roger"
)
);
$find = 1082;
$value = '';
$arr = array_map(function($n) use ($find, &$value) {if ($n['id'] == $find) $value = $n['name']; }, $array);
print_r($value);
?>