3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array ( 'Apr-2019' => array ( 0 => array ( 'DateUser' => 'Apr-2019', 'withdarw_amount' => 4.00 ), 1 => array ( 'current_deposit_amount' => 1.00, 'current_deposit_table_refer' => 0.00, 'current_deposit_user_refer' => 0.10, 'DateUser' => 'Apr-2019' ), ), 'Jun-2019' => array ( 0 => array ( 'DateUser' => 'Jun-2019', 'withdarw_amount' => 334.00 ), ) ); foreach ($array as &$arr) { $arr = array_merge(...$arr); } print_r($array);
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Array ( [Apr-2019] => Array ( [DateUser] => Apr-2019 [withdarw_amount] => 4 [current_deposit_amount] => 1 [current_deposit_table_refer] => 0 [current_deposit_user_refer] => 0.1 ) [Jun-2019] => Array ( [DateUser] => Jun-2019 [withdarw_amount] => 334 ) )

preferences:
142.94 ms | 408 KiB | 5 Q