Retrieve whitelisted set of parameters

with_5.4.php

<?php

function filter_params(array $params = [], array $whitelist = []) {
  return array_map('trim', array_intersect_key($params, array_flip($whitelist)));
}

$params    = ['is_admin' => 1, 'name' => ' Bob', 'surname' => 'Smith '];
$whitelist = ['name', 'surname'];

// these are your whitelisted parameters (please don't forget to filter/validate before persisting)
var_dump(filter_params($params, $whitelist));

without_5.4.php

<?php

function filter_params(array $params = array(), array $whitelist = array()) {
  return array_map('trim', array_intersect_key($params, array_flip($whitelist)));
}

$params    = array('is_admin' => 1, 'name' => ' Bob', 'surname' => 'Smith ');
$whitelist = array('name', 'surname');

// these are your whitelisted parameters (please don't forget to filter/validate before persisting)
var_dump(filter_params($params, $whitelist));

RE: http://rubysource.com/rails-mass-assignment-issue-a-php-perspective