Please help me with this simple algorithm

The writing is not good, please optimize it
An array of user IDs

<code>$uids = [1,2,3,5,6,8,9,11,13,25,65];</code>

Each key value of this array represents a UID
Amount array

<code>$amounts = [
    1=>12000,
    2=>500,
    3=>11000,
    5=>1000,
    6=>11000,
    8=>12000,
    9=>12000,
    11=>11000,
    13=>12000,
    25=>22000,
    65=>123123
];</code>

The key name of this array corresponds to the key value of the $uid array.
Loop through the $uids array and take out the corresponding amount $amount.
If the amount is greater than or equal to 12000 ($boundary), add the $amount to the total amount ($totals).
If the amount is less than 12000, go down again. Loop until the sum of these $amounts is greater than or equal to 12,000, then add the sum of these $amounts to the total amount ($totals) and take up to three levels.
Finally get the value of $totals.
My current code:

<code><?php
$boundary = 12000;
$uids= [1,2,3,5,6,8,9,11,13,25,65];
$amounts = [
    1=>12000,
    2=>500,
    3=>11000,
    5=>1000,
    6=>11000,
    8=>12000,
    9=>12000,
    11=>11000,
    13=>12000,
    25=>22000,
    65=>123123
];
$totals = 0;
foreach($uids as $k => $uid){
    $amont = $amounts[$uid];
    if($amont >= $boundary){
        $totals += $amont;
    }else{
        $next = get_next($uids ,$k+1 ,$amont);
        if($next && is_array($next)){
            $curKey = $next[0]; //amouts index 3
            $totals+=$next[2];
            //再向下获取一层
            $nextKey = $curKey+1;
            if(!isset($uids[$nextKey])){
                break;
            }
            $nextUid = $uids[$nextKey];
            $nextAmount = $amounts[$nextUid];
            if($nextAmount >= $boundary){
                $totals+=$nextAmount;
            }else{
                $last = get_next($uids ,$nextKey+1 ,$nextAmount);
                if($last && is_array($last)){
                    $totals+=$last[2];
                }
            }
        }
        break; //跳出主循环
    }
}
echo $totals;
exit;

function get_next($uids ,$start ,$prevAmount){
    global $amounts ,$boundary;
    $leaves = array_slice($uids ,$start ,count($uids),true);
    if($leaves){
        foreach($leaves as $k=>$uid){
            $amount = $prevAmount+$amounts[$uid];
            if($amount >= $boundary){
                return [$k ,$uid ,$amount];
                break;
            }else{
                return get_next($uids ,$k+1 ,$amount);
            }
        }
    }
    return 0;
}</code>

Get $totals=47500

Reply content:

The writing is not good, please optimize itAn array of user IDs

<code>$uids = [1,2,3,5,6,8,9,11,13,25,65];</code>

Each key value of this array represents a UID

Amount array

<code>$amounts = [
    1=>12000,
    2=>500,
    3=>11000,
    5=>1000,
    6=>11000,
    8=>12000,
    9=>12000,
    11=>11000,
    13=>12000,
    25=>22000,
    65=>123123
];</code>

The key name of this array corresponds to the key value of the $uid array.

Loop through the $uids array and take out the corresponding amount $amount.
If the amount is greater than or equal to 12000 ($boundary), add the $amount to the total amount ($totals).
If the amount is less than 12000, go down again. Loop until the sum of these $amounts is greater than or equal to 12,000, then add the sum of these $amounts to the total amount ($totals) and take up to three levels.
Finally get the value of $totals.
My current code:

<code><?php
$boundary = 12000;
$uids= [1,2,3,5,6,8,9,11,13,25,65];
$amounts = [
    1=>12000,
    2=>500,
    3=>11000,
    5=>1000,
    6=>11000,
    8=>12000,
    9=>12000,
    11=>11000,
    13=>12000,
    25=>22000,
    65=>123123
];
$totals = 0;
foreach($uids as $k => $uid){
    $amont = $amounts[$uid];
    if($amont >= $boundary){
        $totals += $amont;
    }else{
        $next = get_next($uids ,$k+1 ,$amont);
        if($next && is_array($next)){
            $curKey = $next[0]; //amouts index 3
            $totals+=$next[2];
            //再向下获取一层
            $nextKey = $curKey+1;
            if(!isset($uids[$nextKey])){
                break;
            }
            $nextUid = $uids[$nextKey];
            $nextAmount = $amounts[$nextUid];
            if($nextAmount >= $boundary){
                $totals+=$nextAmount;
            }else{
                $last = get_next($uids ,$nextKey+1 ,$nextAmount);
                if($last && is_array($last)){
                    $totals+=$last[2];
                }
            }
        }
        break; //跳出主循环
    }
}
echo $totals;
exit;

function get_next($uids ,$start ,$prevAmount){
    global $amounts ,$boundary;
    $leaves = array_slice($uids ,$start ,count($uids),true);
    if($leaves){
        foreach($leaves as $k=>$uid){
            $amount = $prevAmount+$amounts[$uid];
            if($amount >= $boundary){
                return [$k ,$uid ,$amount];
                break;
            }else{
                return get_next($uids ,$k+1 ,$amount);
            }
        }
    }
    return 0;
}</code>

Get $totals=47500