phparraysfiltermultidimensional-array

Search a 2d array by one column value and return another value from the qualifying row


Say I have an array such as:

$arr[] = array("id" => 11, "name" => "First");
$arr[] = array("id" => 52, "name" => "Second");
$arr[] = array("id" => 6, "name" => "Third");
$arr[] = array("id" => 43, "name" => "Fourth");

I would like to get the name correspondent to a certain ID so that I can do:

$name = findNameFromID(43);

and get, for instance, "Fourth".

I thought of using array_filter but I am a bit stuck on how to correctly pass a variable. I have seen questions such as this one but I don't seem to be able to extend the solution to a multidimensional array.

Any help?


Solution

  • findNameFromID($array,$ID) {
         return array_values(array_filter($array, function($arrayValue) use($ID) { return $arrayValue['id'] == $ID; } ));
    }
    
    $name = findNameFromID($arr,43);
    if (count($name) > 0) {
        $name = $name[0]['name'];
    } else {
        echo 'No match found';
    }
    

    PHP 5.3.0 and above

    EDIT

    or variant:

    findNameFromID($array,$ID) {
        $results = array_values(array_filter($array, function($arrayValue) use($ID) { return $arrayValue['id'] == $ID; } ));
        if (count($results) > 0) {
            return $name[0]['name'];
        } else {
            return FALSE;
        }
    }
    
    $name = findNameFromID($arr,43);
    if (!$name) {
        echo 'No match found';
    }
    

    EDIT #2

    And from PHP 5.5, we can use array_column()

    findNameFromID($array, $ID) {
        $results = array_column($array, 'name', 'id');
        return (isset($results[$ID])) ? $results[$ID] : FALSE;
    }