Online PHP editor | output for 2hHov

@ 2017-09-21T08:24:06Z

<?php
  function array_flatten($array, $allowedKeys = [], $result = []) { 
    if(!is_array($array)) { 
      return false;
    }

    foreach($array as $key => $value) { 
      if(is_array($value)) { 
        $result = array_flatten($value, $allowedKeys, $result); 
      } else if(in_array($key, $allowedKeys)) {
        $result[$key] = $value; 
      }
    } 

    return $result; 
  }

  $allowedKeys = [
    'firstname',
    'middlename',
    'street',
    'lastname',
    'housenumber',
  ];

  $userdata = [
    'firstname' => 'first',
    'middlename' => 'middle',
    'lastname' => 'last',
    'address' => [ 
      'street' => 'streeeeeet',
      'housenumber' => '10'
    ]
  ];

  $addresses = array_flatten($userdata, $allowedKeys);
  var_dump($addresses);

Output for 7.0.0 - 7.0.23, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 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(5) { ["firstname"]=> string(5) "first" ["middlename"]=> string(6) "middle" ["lastname"]=> string(4) "last" ["street"]=> string(10) "streeeeeet" ["housenumber"]=> string(2) "10" }
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(5) { ["firstname"]=> string(5) "first" ["middlename"]=> string(6) "middle" ["lastname"]=> string(4) "last" ["street"]=> string(10) "streeeeeet" ["housenumber"]=> string(2) "10" }

preferences:dark modelive preview