假设，有A,B,C三个人住在一起，需要开发一个网站来记录他们日常花费，比如买菜等等。那么数据表该怎么设计呢？另外这些数据怎么运算到每个人总共要付出多少钱呢？
以下是我的代码：
//$aData里面的每个数组表示每天的消费记录, money:当天总费用， mean：人均费用 ，其他的表示 用户名 ： 1/0/-1 付钱人/不用付/要付钱人
$aData = [
['money' => 30, 'mean'=> 10, 'twl' => 1, 'xxx' => -1, 'yyy' => -1],
['money' => 10, 'mean'=> 5, 'twl' => -1, 'xxx' => 1, 'yyy' => 0],
];
$count = 0;
$aList = [];
foreach($aData as $val){
foreach($val as $k => $v){
if($k == 'money'){
$count += $val['money'];
}elseif($k != 'mean' && $k != 'boss'){
$aList[$k][] = [
'out' => $v > 0 ? $val['money'] : 0, //表示自己付出的钱
'in' => $v < 0 ? $val['mean'] : 0, //表示自己要给分担的钱
'who' => $val['boss'],
];
}
}
}
$aData = [];
foreach($aList as $k => $v){
$in = $out = 0;
foreach($v as $key => $val){
$in += $val['in'];
$out += $val['out'];
}
$aData[$k] = [
'out' => $out,
'in' => $in,
];
}
结果是
这样还是不能知道 到底谁付钱给谁。求教
------解决思路----------------------
你可以一笔一笔的算
$aData = [
['money' => 30, 'mean'=> 10, 'twl' => 1, 'xxx' => -1, 'yyy' => -1],
['money' => 30, 'mean'=> 10, 'twl' => -1, 'xxx' => -1, 'yyy' => 1],
['money' => 10, 'mean'=> 5, 'twl' => -1, 'xxx' => 1, 'yyy' => 0],
['money' => 20, 'mean'=> 10, 'twl' => 0, 'xxx' => 1, 'yyy' => -1],
['money' => 20, 'mean'=> 10, 'twl' => 0, 'xxx' => 1, 'yyy' => -1],
['money' => 20, 'mean'=> 10, 'twl' => 0, 'xxx' => 1, 'yyy' => -1],
];
foreach($aData as $id=>$m) {
$u = array_diff_key($m, ['money' => 0, 'mean' => 0]);
arsort($u);
foreach($u as $k=>$v) {
if($v == 0) continue;
if($v == 1) {
$boss = $k;
$r[$k][] = ['id' => $id, 'out' => $m['money']];
}else {
$r[$k][] = ['id' => $id, 'out' => $m['mean'], 'boss' => $boss];
$r[$boss][] = ['id' => $id, 'in' => $m['mean'], 'boss' => $k];
}
}
}
print_r($r);
Array
(
[twl] => Array
(
[0] => Array
(
[id] => 0
[out] => 30
)
[1] => Array
(
[id] => 0
[in] => 10
[boss] => yyy
)
[2] => Array
(
[id] => 0
[in] => 10
[boss] => xxx
)
[3] => Array
(
[id] => 1
[out] => 10
[boss] => yyy
)
[4] => Array
(
[id] => 2
[out] => 5
[boss] => xxx
)
)
[yyy] => Array
(
[0] => Array
(
[id] => 0
[out] => 10
[boss] => twl
)
[1] => Array
(
[id] => 1
[out] => 30
)
[2] => Array
(
[id] => 1
[in] => 10
[boss] => xxx
)
[3] => Array
(
[id] => 1
[in] => 10
[boss] => twl
)
[4] => Array
(
[id] => 3
[out] => 10
[boss] => xxx
)
[5] => Array
(
[id] => 4
[out] => 10
[boss] => xxx
)
[6] => Array
(
[id] => 5
[out] => 10
[boss] => xxx
)
)
[xxx] => Array
(
[0] => Array
(
[id] => 0
[out] => 10
[boss] => twl
)
[1] => Array
(
[id] => 1
[out] => 10
[boss] => yyy
)
[2] => Array
(
[id] => 2
[out] => 10
)
[3] => Array
(
[id] => 2
[in] => 5
[boss] => twl
)
[4] => Array
(
[id] => 3
[out] => 20
)
[5] => Array
(
[id] => 3
[in] => 10
[boss] => yyy
)
[6] => Array
(
[id] => 4
[out] => 20
)
[7] => Array
(
[id] => 4
[in] => 10
[boss] => yyy
)
[8] => Array
(
[id] => 5
[out] => 20
)
[9] => Array
(
[id] => 5
[in] => 10
[boss] => yyy
)
)
)