Online PHP editor | refs for VBtDI

<?php $arr = array( array( 'id' => 1, 'user_name'=>'test1' ), array( 'id' => 2, 'user_name'=>'test2' ), array( 'id' => 3, 'user_name'=>'test3' ) ); $arr2 = array( array( 'id' => 1, 'shop_name'=>'shop1' ), array( 'id' => 5, 'shop_name'=>'shop2' ), array( 'id' => 3, 'shop_name'=>'shop3' ) ); /*function filter($item) { return count($item) == 3 ? $item :false; } $newArr = array_filter(array_merge($arr, $arr2), 'filter'); print_r($newArr); foreach($arr as $key => &$value) { //$value['shop_name']=''; } unset( $value ); foreach($arr as $k2 =>&$v2) {$v2['shop_name']=''; foreach($arr2 as $k =>$v) { if($v2['id'] == $v['id']) { $v2['shop_name'] = $v['shop_name']; } } } print_r($arr);*/ $user_name = array_column($arr, 'user_name', 'id'); $shop_name = array_column($arr, 'shop_name', 'id'); $arr = []; foreach($user_name as $id => $user) { $temp = ['id'=>$id, 'user_name'=>$user, 'shop_name'=>'']; if(array_key_exists($id, $shop_name)) $temp['shop_name'] = $shop_name[$id]; $arr[] = $temp; } print_r($arr);