从PHP数组减去整数 [英] Subtract an integer from an array in PHP

问题描述

我有一个变量，它是：

$sum = 42500;

我有一个数组，看起来像这样：

I have an array that looks like this:

$targetsarray = array(
    '5000' => '',
    '5000' => '',
    '10000' => '',
    '10000' => '',
    '10000' => '',
    '10000' => '',
    '10000' => '',
    '12000' => '',
    '12000' => '',
    '15000' => '',
    '15000' => '',
    '15000' => '',
};

在$ targetsarray内的密钥，因此它实际上看起来这是动态地从数据库中生成的：

The key inside the $targetsarray is generated dynamically from the database so it in fact looks like this:

$targetsarray = array(
    $targets => '',
};

我想阵列中实现的由阵列中的每个连续的键减去$总和值，使得最终$ targetsarray看起来像这样：

What I would like to achieve in the array is to subtract the $sum value by each consecutive key in the array so that the final $targetsarray looks like this:

$sum = 45000;

$targetsarray = array(
    '5000' => '40000', // subtract 5000 from 45000
    '5000' => '35000', // subtract 5000 from 40000
    '10000' => '25000', // subtract 10000 from 35000
    '10000' => '15000', // subtract 10000 from 25000
    '10000' => '5000', // subtract 10000 from 15000
    '10000' => '0', 
    '10000' => '0',
    '10000' => '0',
    '10000' => '0',
    '10000' => '0',
    '10000' => '0',
    '10000' => '0',
};

反正是有，我可以从$ targetsarray每个按键减去$总和？您的帮助将是一个数组noobie :)

Is there anyway that I can subtract the $sum from each key in the $targetsarray? Your help will be highly appreciated from an array noobie :)

推荐答案

您可能只是两个数组：

$targetsarray = array(5000, 5000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000);
$anotherarray = array();
$sum = 45000;
foreach($targetsarray as $val){
$anotherarray[] = $sum = ($sum >= $val) ? $sum-$val : 0;
}

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