Find value of sibling key in php array

Question

I have an array in PHP, here is a snippet:

Array
(
[0] => Array
    (
        [id] => 202
        [name] => GXP Club - Fable
    )

[1] => Array
    (
        [id] => 204
        [name] => GXP Club - Gray
    )
)

What I know (from a GET) is the ID (202). What I would like to display is "Showing results for " ( where $locations[?][id] = $_GET['id'] { echo $locations[?][name] } ) - if you will pardon my use of pseudo code.

Not sure what function is best or if I need to loop over the whole array to find that. Thanks.

Edit: for further clarification. I need to learn the [name] given the [id]

Answer 1

foreach( $locations as $arr ) {
    if($arr['id'] == $_GET['id']) {
        echo $arr['name'];
        break;
    }
}

That should do the trick.

Answer 2

While looping over the array is the solution for the problem as described, it seems more optimal to change your array to be $id=>$name key-value pairs, instead of named key values if that's all the data in the array, e.g.:

$locations = array( '202' => 'GXP Club - Fable',
                    '204' => 'GXP Club - Gray',
             )

Alternatively, if there's more data, I'd switch to a nested data structure, e.g.:

$locations = array( '202' => array( 'name' => 'GXP Club - Fable', 'prop2' =>$prop2, etc),      
                    '204' => array( 'name' => 'GXP Club - Gray', 'prop2' =>$prop2, etc),
             )

That makes it so you can access data via ID (e.g. $locations[$id]['name']), which seems to be what you'd generally be wanting to do.

Answer 3

You can use array_map function which applies your custom action to each element in given array.

array_map(
    function($arr) { if ($arr['id'] == $_GET['id']) echo $arr['name']; }, 
    $locations
);