Online PHP editor | output for j0SbN

<?php $conditionalFieldsWhitelist = [ 'Basic Fields' => [ 'contact_name', 'contact_lastname', ] ]; $myArray = [ 'Basic Fields' => [ [ 'field_name' => 'contact_name', 'field_type' => 'string', 'field_required' => 'no', ], [ 'field_name' => 'contact_lastname', 'field_type' => 'string', 'field_required' => 'no', ], [ 'field_name' => 'contact_email', 'field_type' => 'string', 'field_required' => 'yes', 'field_placeholder' => 'example@domain.com' ], [ 'field_name' => 'contact_mobile', 'field_type' => 'string', 'field_required' => 'yes', 'field_placeholder' => '+27881234567' ] ] ]; $whitegroups = array_keys($conditionalFieldsWhitelist); // only necessary if multiple groups foreach ($myArray as $group => $field_sets) { if (in_array($group, $whitegroups)) { $whitesubsets = $conditionalFieldsWhitelist[$group]; $result[$group] = array_filter($field_sets, function($set) use ($whitesubsets) { return in_array($set['field_name'],$whitesubsets);}); } } var_export($result);