php数组的数据相加 php数组加法

php数组，元素相加

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PHP里如何把数组里的值相加

//摘自php5手册

?php

$a = array(2, 4, 6, 8);

echo "sum(a) = " . array_sum($a) . "\n";

$b = array("a" = 1.2, "b" = 2.3, "c" = 3.4);

echo "sum(b) = " . array_sum($b) . "\n";

?

PHP 多个数组合并 重新生成新的数组并按要求值相加

$aa='[{"id": 0, "num": "2", "name": "产品1", "price": "37", "amount": 74, "zdamount": 100}, {"id": 1, "num": "2", "name": "产品2", "price": "37", "amount": 74, "zdamount": 100}]';

$bb='[{"id": 0, "num": "3", "name": "产品1", "price": "37", "amount": 90, "zdamount": 110}, {"id": 1, "num": "5", "name": "产品2", "price": "37", "amount": 150, "zdamount": 180}]';

$cc='[{"id": 2, "num": "3", "name": "产品3", "price": "37", "amount": 90, "zdamount": 110}, {"id": 1, "num": "5", "name": "产品2", "price": "37", "amount": 150, "zdamount": 180}]';

$j_a = json_decode($aa,1);

$j_b = json_decode($bb,1);

$j_c = json_decode($cc,1);

$arr_list = [$j_a,$j_b,$j_c];//把数组扔进大数组php数组的数据相加，这样可以随意增加个数

$result = [];

foreach ($arr_list as $k=$v) {//第一次循环php数组的数据相加，把原数组取出

foreach ($v as $key = $value) {//第二次循环php数组的数据相加，正式取出数据

if (isset($result[$value['id']])) {//如果有此idphp数组的数据相加，则进行累加操作

$result[$value['id']]['num'] += $value['num'];

$result[$value['id']]['amount'] += $value['amount'];

$result[$value['id']]['zdamount'] += $value['zdamount'];

} else {//没有此id则进行赋值操作

$result[$value['id']]['id'] = $value['id'];

$result[$value['id']]['price'] = $value['price'];

$result[$value['id']]['name'] = $value['name'];

$result[$value['id']]['num'] = $value['num'];

$result[$value['id']]['amount'] = $value['amount'];

$result[$value['id']]['zdamount'] = $value['zdamount'];

}

}

}

echo json_encode($result,320);//输出结果，如果需要序列化键值，可以使用array_values($result)

php如何将数组遍历出来的结果相加？

方法1,累加

?php

$arr=array(1,2,3,4);

$sum=0;//设变量

foreach($arr as $value){

echo $value.'br';

$sum+=$value;//累加

}

echo $sum;//显示

方法2php数组的数据相加，直接求

?php

$arr=array(1,2,3,4);

echo array_sum($arr);

php 数组求和

递归,php递归有限制,跟机器有关心,可能抛出超过100,用的时候小心

求和,可以先转成以为数组,然后用数据求和函数array_sum吧

php数组值如何正确相加

//摘自php5手册

?php

$a = array(2, 4, 6, 8);

echo "sum(a) = " . array_sum($a) . "\n";

$b = array("a" = 1.2, "b" = 2.3, "c" = 3.4);

echo "sum(b) = " . array_sum($b) . "\n";

?

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