case_study_12.php

<?php
 
$users = [
    [
        'id'     => 1,
        'name'   => 'Adimas Lutfi Wicaksono',
        'gender' => 1,
    ],
    [
        'id'     => 2,
        'name'   => 'Salman Alfarisi',
        'gender' => 1,
    ],
    [
        'id'     => 3,
        'name'   => 'Muhammad Sholeh',
        'gender' => 1,
    ],
    [
        'id'     => 4,
        'name'   => 'Yadi Cahyadi',
        'gender' => 1,
    ],
    [
        'id'     => 5,
        'name'   => 'Maya Maulani',
        'gender' => 2,
    ],
];

// http://www.php.net/manual/en/language.references.pass.php
// http://id1.php.net/manual/en/function.array-walk.php
array_walk ( $users, function (&$key) { 
	$key["gender"] = $key["gender"] == 1 ? "Male" : "Female";
});

print_r($users);