Online PHP editor | refs for MZgku

<?php function append(array $init, array $add, $key = null, $initialKeyExist = true) { $_init = $init; if (is_null($key)) { foreach ($add as $key => $value) $_init[$key] = $value; return array_merge($_init, $init); } else { if ($initialKeyExist) { $_init[$key] = $add; return [ $key => array_merge($_init[$key], $init[$key]) ]; } else { foreach ($add as $k => $value) $_init[$key][$k] = $value; return $_init; } } } $a = [ 'phone' => [ 'code' => '+38', ], ]; $b = [ 'prefix' => '095', 'number' => '7700418', ]; var_dump(append($a, $b, 'phone')); $a = [ 'code' => '+38', ]; $b = [ 'prefix' => '095', 'number' => '7700418', ]; var_dump(append($a, $b)); $a = [ 'phone' => [ 'code' => '+38', ], ]; $b = [ 'prefix' => '095', 'number' => '7700418', ]; var_dump(append($a, $b, 'phone', false));