想知道如何从此数组中获取以下值：CampaignID，广告系列，展示次数，点击次数和费用。例如，我想要得到以下结果：
campaignID-9039077962广告系列：CG-智能购物-美国展示-1951940点击次数-10726费用-5324010696
我已经开始使用forloop了，但无法获取任何值，只是得到：ArrayArrayArray
for($i = 0; $i < count($array); $i++) {
echo $array[2]['row'][$i]['@attributes']['campaignID'];
}
这是我的数组，它是打印结果：
$array = simplexml_load_string($reportDownloadResult->getAsString());
print_r( $result );
RESULTS------------------------------------------->
Array
(
[report-name] => Array
(
[@attributes] => Array
(
[name] => CAMPAIGN_PERFORMANCE_REPORT
)
)
[date-range] => Array
(
[@attributes] => Array
(
[date] => Jul 13, 2020-Jul 19, 2020
)
)
[table] => Array
(
[columns] => Array
(
[column] => Array
(
[0] => Array
(
[@attributes] => Array
(
[name] => campaignID
[display] => Campaign ID
)
)
[1] => Array
(
[@attributes] => Array
(
[name] => campaign
[display] => Campaign
)
)
[2] => A
rray
(
[@attributes] => Array
(
[name] => impressions
[display] => Impressions
)
)
[3] => Array
(
[@attributes] => Array
(
[name] => clicks
[display] => Clicks
)
)
[4] => Array
(
[@attributes] => Array
(
[name] => cost
[display] => Cost
)
)
)
)
[row] => Array
(
[0] => Array
(
[@attributes] => Array
(
[campaignID] => 9039077962
[campaign] => CG - Smart Shopping - USA
[impressions] => 1951940
[clicks] => 10726
[cost] => 5324010696
)
)
[1] => Array
(
[@attributes] => Array
(
[campaignID] => 9040836852
[campaign] => CG - RLSA - USA
[impressions] => 58
[clicks] => 9
[cost] => 3830000
)
)
[2] => Array
(
[@attributes] => Array
(
[campaignID] => 9335113576
[campaign] => CG - Youtube - Remarketing - US
[impressions] => 11727
[clicks] => 45
[cost] => 470305195
)
)
[3] => Array
(
[@attributes] => Array
(
[campaignID] => 9336396427
[campaign] => CG - Gmail Display Remarketing - USA
[impressions] => 197
[clicks] => 29
[cost] => 3581214
)
)
[4] => Array
(
[@attributes] => Array
(
[campaignID] => 9503218446
[campaign] => CG - Shopping - USA - Remarketing
[impressions] => 1169
[clicks] => 13
[cost] => 26480000
)
)
[5] => Array
(
[@attributes] => Array
(
[campaignID] => 9507461506
[campaign] => CG - Non-branded - Subscription - USA
[impressions] => 6681
[clicks] => 344
[cost] => 813030000
)
)
[6] => Array
(
[@attributes] => Array
(
[campaignID] => 9599121241
[campaign] => CG - Display - Remarketing - USA
[impressions] => 13930
[clicks] => 156
[cost] => 21271733
)
)
[7] => Array
(
[@attributes] => Array
(
[campaignID] => 10381122443
[campaign] => CG - Branded - USA - Relaunch
[impressions] => 4436
[clicks] => 1113
[cost] => 252800000
)
)
[8] => Array
(
[@attributes] => Array
(
[campaignID] => 10438544600
[campaign] => CG - Non-branded Dynamic Shop - USA
[impressions] => 75
[clicks] => 13
[cost] => 13430000
)
)
[9] => Array
(
[@attributes] => Array
(
[campaignID] => 10494687070
[campaign] => CG - Non-branded - Shop - USA
[impressions] => 107
[clicks] => 8
[cost] => 11890000
)
)
[10] => Array
(
[@attributes] => Array
(
[campaignID] => 10503251956
[campaign] => CG - Gmail Display Remarketing - USA - Box Themes
[impressions] => 13490
[clicks] => 1050
[cost] => 525795143
)
)
[11] => Array
(
[@attributes] => Array
(
[campaignID] => 10505435235
[campaign] => CG - Non-branded - Subscription - CANADA
[impressions] => 1350
[clicks] => 91
[cost] => 131890000
)
)
)
)
)
答案 0 :(得分：0)
最好使用Simple XML的方法来浏览数据，而不是将其视为数组。但是，如果确实需要，我将在下面显示。
我通常建议使用foreach而不是for遍历数组。但是，如果要对数组索引使用for循环，则它们应基于要索引到的同一数组的count()。先使用count($array)然后再使用它来索引到$array[2]['row']是没有道理的-您应该使用count($array[2]['row'])。
我不确定您从代码中获得$array[2]的位置。顶级数组没有任何编号索引，它是一个关联数组。在您深入嵌套在内部的row和column元素之前，不会使用编号索引。
foreach ($result['table']['row'] as $row) {
$attrs = $row['@attributes'];
echo $attrs['campaignID'];
echo $attrs['campaign'];
echo $attrs['impressions'];
// and so on
}
答案 1 :(得分：0)
#include <memory>
struct Base {
virtual ~Base() = default;
};
struct Derived : Base {
void f() const noexcept {}
};
void work(const Base& b) noexcept
{
// Check what to do, then assume it must be a Derived, then work on it:
dynamic_cast<const Derived&>(b).f();
}
int main() {
std::unique_ptr<Base> p{ std::make_unique<Derived>() };
dynamic_cast<Derived*>(p.get())->f();
work(*p);
return 0;
}