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@ 2018-10-13T16:15:27Z

<?php

function getValue($array, $keySpec){
    foreach (explode('.', $keySpec) as $key){
        if (!isset($array[$key])){
            return null;
        }

        $array = $array[$key];
    }

    return $array;
}

$array = [
    'userList' => [
        '1234' => [
            'name' => 'Kicken'
        ]
    ]
];

var_dump(getValue($array, 'userList.1234.name'));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
explode: documentation ( source)

preferences:dark modelive preview

18.91 ms | 402 KiB | 5 Q