code shared for array manipulation

gistfile1.txt

$okoros = [
    // james okoro
    'james' => [
        'first_name' => 'james',
        'age' => 54,
        'nickname' => 'jj',
        'gender' => 'male',

        "children" => [
            'first_born' => [
                'first_name' => 'obinna',
                'age' => 30,
                'nickname' => 'obi',
                'gender' => 'male',
            ],
            'second_born' => [
                'first_name' => 'emeka',
                'age' => 28,
                'nickname' => 'mekoko',
                'gender' => 'male',
            ],
            'third_born' => [
                'first_name' => 'nneka',
                'age' => 24,
                'nickname' => 'neki',
                'gender' => 'female',
            ],
            'fourth_born' => [
                'first_name' => 'amaka',
                'age' => 20,
                'nickname' => 'amy',
                'gender' => 'female',
            ],

        ]
    ],

    // peter okoro
    'peter' => [
        'first_name' => 'okoro',
        'age' => 48,
        'nickname' => 'piro',
        'gender' => 'male',

        "children" => [
            'first_born' => [
                'first_name' => 'obiora',
                'age' => 30,
                'nickname' => 'obim',
                'gender' => 'male',
            ],

            'second_born' => [
                'first_name' => 'anita',
                'age' => 25,
                'nickname' => 'ani',
                'gender' => 'female',
            ],
            'third_born' => [
                'first_name' => 'chioma',
                'age' => 23,
                'nickname' => 'chibaby',
                'gender' => 'female',
            ],
            'fourth_born' => [
                'first_name' => 'steven',
                'age' => 14,
                'nickname' => 'stevo',
                'gender' => 'male',
            ],

        ]
    ]
];