php二维数组求和

Posted 2023-04-25

Array
(
[0] => Array
(
[order_num] => 2013031802
[cid] => 54
[order_ip] => 125.76.225.1
[order_amo] => 1200
[end_time] => 1366819200
[order_end] => 1394467200
)

[1] => Array
(
[order_num] => 2013041001
[cid] => 54
[order_ip] => 117.34.17.64
[order_amo] => 300
[end_time] => 1366819200
[order_end] => 1394467200
)

[2] => Array
(
[order_num] => 2013041602
[cid] => 57
[order_ip] => 117.34.17.64
[order_amo] => 440
[end_time] => 1366732800
[order_end] => 1395676800
)

[3] => Array
(
[order_num] => 2013041901
[cid] => 58
[order_ip] => 117.34.17.64
[order_amo] => 360
[end_time] => 1394467200
[order_end] => 1396281600
)

[4] => Array
(
[order_num] => 2013041902
[cid] => 59
[order_ip] => 117.34.17.64
[order_amo] => 3000
[end_time] => 1395676800
[order_end] => 1397836800
)

[5] => Array
(
[order_num] => 2013042401
[cid] => 54
[order_ip] =>
[order_amo] => 30000
[end_time] => 1366819200
[order_end] => 1366732800
)

[6] => Array
(
[order_num] => 2013042501
[cid] => 79
[order_ip] => 192.168.1.1
[order_amo] => 2300
[end_time] => 1366819200
[order_end] => 1366819200
)

[7] => Array
(
[order_num] => 2013042502
[cid] => 79
[order_ip] =>
[order_amo] => 10000
[end_time] => 1366819200
[order_end] => 1366819200
)

)
当CID相同的时候把amo加起来，ip拼接起来（ip不相同的时候，ip不为空），写成一个新的数组

参考技术A $new = array();
foreach($array as $value)
//新的cid号存一个新的数组
if(empty($new[$value['cid']]))
$new[$value['cid']] = $value;
//存储IP进入数组，方便后续判断
$new[$value['cid']]['ip'] = array($value['order_ip']);
else
//累加amo的值
$new[$value['cid']]['order_amo'] += $value['order_amo'];
//判断IP是否为空或者是否重复
if(!empty($value['order_ip']) && !in_array($value['order_ip'],$new[$value['cid']]))
//拼接ip，并添加到IP数组，方便后续判断
$new[$value['cid']]['order_ip'] .= ','.$value['order_ip'];
$new[$value['cid']]['ip'] = array($value['order_ip']);


本回答被提问者采纳

求助：PHP如何判断二维数组哪些竖列的值相同？

例子：
M[0][0] M[0][1] M[0][2]
M[1][0] M[1][1] M[1][2]
M[2][0] M[2][1] M[2][2]

$data[$i][$j] 数组一个很大的。知道$i和$j的最大值
以上输出
000
010
000

如何判断上面那些竖列的值都为0？

<?php
$m = array(
    array(0, 0, 0),
    array(0, 1, 0),
    array(0, 0, 0),
);
$max_i = 3;
$max_j = 3;

for ($column=0; $column!=$max_j; $column++) 
    $result = true;
    for ($row=0; $row!=$max_i; $row++) 
        if ($m[$row][$column] != 0) 
            $result = false;
            break;
        
    
    echo "第$column列".($result ? '全' : '不全')."为空\\n";

输出:

第0列全为空

第1列不全为空

第2列全为空

参考技术A 竖列？？？就是M[0][0]、M[1][0]、M[2][0]。。。。。。的值呗
$count = $i的最大值
for($i=0; $i++; $<$count)
echo M[$i][0];
echo '<br />';
追问

for($i = 0; $i<$count; $i++)
for($j = 0; $j < $count2;$j++)
#需要的是判断M[0][0]、M[1][0]、M[2][0] / M[0][1]、M[1][1]、M[2][1] / M[0][2]、M[1][2]、M[2][2]是值否相同