Php 如何得到foreach循环的和？

我有一个foreach循环问题，我认为我的逻辑有问题。表中的数据将从付款金额中减去，如果付款金额为0，则将停止循环

PHP 5

这是我桌子上的数据

2000
15000
3000

我总是得到这个输出

3000
-12000
-15000

这应该是正确的输出

-2000
-3000

---

我想你想要达到的是

   $payment_amount_pay = 5000;

foreach ($data as $value) {

    $amount = $value['AMOUNT'];
If ($payment_amount_pay -= amount > 0){
    $payment_amount_pay = $payment_amount_pay - $amount;}


    echo “-“.$amount;

}

2000年、15000年、3000年，我认为这一数额代表了美元价值[‘金额’]

---

如何成为-2000和-3000？

我相信你希望它是这样的

$payment_amount_pay = 5000;

foreach ($data as $value) {

    // Check if the amount already used up
    if($payment_amount_pay < 0) {
        break;
    }

    $amount = $value['AMOUNT'];

    // Get the differences
    $payment_amount_pay = $payment_amount_pay - $amount;

    if($payment_amount_pay >= 0) {
        // Changed to negative (not sure why you need it)
        echo 0  - $amount."<br>";
    }
    else {
        // Changed to negative (not sure why you need it)
        echo 0  - $payment_amount_pay - $amount."<br>";
    }
}

---

你能说清楚你想要什么吗？根据表条目和正在运行的代码，您编写的正确输出看起来不正确。你认为正确的输出应该是你写的吗？我认为这里需要更多的信息。例如，$value是否如您所示是单个值或集合。对于$value['AMOUNT']？仅从第一次迭代开始5000-2000=3000，-2000怎么可能是正确的？$payment\u AMOUNT\u pay=$payment\u AMOUNT\u pay-$value['AMOUNT']；减去付款金额后，输入$payment\u amount\u pay。所以，$payment\u amount\u pay value被覆盖；然而，您只是使用了原始数据$payment\u amount\u pay=$payment\u amount\u pay-$value['amount']；嗯，差不多吧，如果我有5000美元的话。该金额将在表格数据中减去。就像我上面所说的。你的错误是，你需要一个if语句，并检查付款金额减去表中的金额是否会高于或低于0：如果支票返回truehmmm，你应该只做减法。例如：如果我的表中有2000，15000，我有5000的付款，付款将在2000年减去，剩下的将是剩下的。嗨，答案是正确的，但我有澄清。你介意我澄清一下吗？当然可以。请随便问。

$payment_amount_pay = 5000;

    foreach ($data as $value) {

        $amount = $value['AMOUNT'];

        $payment_amount_pay = $payment_amount_pay - $amount;

        // first loop => 3000  = 5000 - 2000;  3000 will be $payment_amount_pay
        // second loop => -12000  = 3000 - 15000; -12000 will be $payment_amount_pay
        // third loop =>  -15000  = -12000 - 3000; -15000 will be $payment_amount_pay

        echo $payment_amount_pay;

    }

$payment_amount_pay = 5000;

foreach ($data as $value) {

    // Check if the amount already used up
    if($payment_amount_pay < 0) {
        break;
    }

    $amount = $value['AMOUNT'];

    // Get the differences
    $payment_amount_pay = $payment_amount_pay - $amount;

    if($payment_amount_pay >= 0) {
        // Changed to negative (not sure why you need it)
        echo 0  - $amount."<br>";
    }
    else {
        // Changed to negative (not sure why you need it)
        echo 0  - $payment_amount_pay - $amount."<br>";
    }
}