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@ 2017-07-10T09:48:38Z

<?php

$data = [
    'ApplicantDetails_AdditionalApplicantDetails_OtherSurnames_OtherSurname' => [['name' => 'one'], ['name' => 'two']],
    'ApplicantDetails_AdditionalApplicantDetails_OtherNames' => [['surname' => 'three', 'forename' => 'forename'],['surname' => 'four']],
    'ApplicantDetails_AdditionalApplicantDetails_BirthSurname' => 'birthSurname',
    'ApplicantDetails_PresentSurname' => 'presentSurname'
];

$surnameKeys = [
    ['ApplicantDetails_AdditionalApplicantDetails_OtherSurnames_OtherSurname', 'name'],
    ['ApplicantDetails_AdditionalApplicantDetails_OtherNames', 'surname'],
    'ApplicantDetails_AdditionalApplicantDetails_BirthSurname',
    'ApplicantDetails_PresentSurname'
];

$something = [];

array_walk($surnameKeys, function ($keys) use ($data) {
    var_dump($keys);
    
    if (is_array($keys)) {
        echo 'is array';
        if (isset($data[$keys[0]])) {
            echo 'here';
            $something[] = array_column($data[$keys[0]], $keys[1]);
        }
    }
});

// array_map(function ($keys) use ($data) {
//     if (is_array($keys)) {
//         if (isset($data[$keys[0]])) {
//             $something[] = array_column($data[$keys[0]], $keys[1]);
//             continue;
//         }
//     }

//     if (isset($data[$keys])) {
//         $something[] = $data[$keys];
//     }
// }, $surnameKeys);

var_dump($something);

// $uniq = array_unique($something);
// var_dump($uniq);

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: array(2) { [0]=> string(70) "ApplicantDetails_AdditionalApplicantDetails_OtherSurnames_OtherSurname" [1]=> string(4) "name" } is arrayherearray(2) { [0]=> string(54) "ApplicantDetails_AdditionalApplicantDetails_OtherNames" [1]=> string(7) "surname" } is arrayherestring(56) "ApplicantDetails_AdditionalApplicantDetails_BirthSurname" string(31) "ApplicantDetails_PresentSurname" array(0) { }
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(2) { [0]=> string(70) "ApplicantDetails_AdditionalApplicantDetails_OtherSurnames_OtherSurname" [1]=> string(4) "name" } is arrayherearray(2) { [0]=> string(54) "ApplicantDetails_AdditionalApplicantDetails_OtherNames" [1]=> string(7) "surname" } is arrayherestring(56) "ApplicantDetails_AdditionalApplicantDetails_BirthSurname" string(31) "ApplicantDetails_PresentSurname" array(0) { }

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