Array refactoring reconstruct a new two-dimensional array based on the mid's total investment in mid

$arr = Array (' mid ' = ' 28838 ', ' invest_money ' = ' 1196000 ', ' rm_id ' = ' 157733 ',), =&G T;array (' mid ' = ' 28838 ', ' invest_money ' = ' 1180000 ', ' rm_id ' = ' 157733 ', '), ' (' Mid ' =&gt ; ' 28838 ', ' invest_money ' = ' 910000 ', ' rm_id ' = ' 157733 ', ' 2205 ', ' = ', ' mid ' = ' 20191 ', ' Invest_money ' =& Gt ' 350000 ',' rm_id ' = ' 157733 ',),2207 = = Array (' mid ' = ' 20191 ', ' invest_money ' = ' 550000 ',   ' rm_id '  =>  ' 157733 ',)  ); $arr  = array_values ($arr); $new  = array ()  foreach ($arr  as  $key + $val)  {    if ($key  == 0)  {        $ new[$val [' mid ']] =  $val [' Invest_money '];    } else {         if (array_key_exists ($val [' mid '],  $new))  {              $new [$val [' Mid ']] +=  $val [' Invest_money '];         } else {              $new [$val [' Mid ']] =  $val [' Invest_money '];         }    }}  $new 2 = array (); foreach ($arr  as  $key = > $val)  {    foreach ($new  as  $k = $v)  {         if ($arr [$kEy][' mid '] ==  $k)  {            $ new2[$k] [' mid '] =  $k;             $new 2[$ k][' Invest_money '] =  $v;             $ new2[$k] [' rm_id '] =  $val [' rm_id '];        }     }} array   28838 =>     array         ' mid '  =>  28838       ' Invest_ Money '  => 3286000       ' rm_id '  =>   ' 157733 '     20191 =>     array        ' mid '  => 20191       ' Invest_money '  => 900000        ' rm_id ' =>   ' 157733 '

Array refactoring reconstructs a new two-dimensional array based on the mid-stack of all the investments that belong to mid