如何通过以下多维数组循环递归，但仍然按标准计算平均值？这是我的初始数组，然后查找我的代码（循环播放）每个级别都不理想）然后输出。
我正在寻找可以减少或改进此代码的功能，以便我可以重新利用来计算其他级别的平均值。
Array
(
[42715] => Array
(
[1886] => Array
(
[1252] => Array
(
[1016] => Array
(
[Standard 1] => Array
(
[0] => 1.0000000
[1] => 0.5000000
[2] => 1.0000000
[3] => 1.0000000
[4] => 1.0000000
[5] => 1.0000000
)
[1] => 10/24/2017
[Standard 2] => Array
(
[0] => 1.0000000
[1] => 1.0000000
[2] => 1.0000000
)
[Standard 3] => Array
(
[0] => 0.0000000
[1] => 0.0000000
[2] => 0.0000000
)
[Standard 4] => Array
(
[0] => 1.0000000
[1] => 1.0000000
[2] => 1.0000000
)
[Standard 5] => Array
(
[0] => 1.0000000
[1] => 1.0000000
[2] => 0.0000000
)
[Standard 6] => Array
(
[0] => 0.0000000
[1] => 1.0000000
[2] => 1.0000000
[3] => 0.0000000
[4] => 1.0000000
[5] => 1.0000000
)
[Standard 7] => Array
(
[0] => 1.0000000
[1] => 1.0000000
[2] => 1.0000000
)
[Standard 8] => Array
(
[0] => 0.0000000
[1] => 1.0000000
[2] => 0.0000000
)
[Standard 9] => Array
(
[0] => 0.0000000
[1] => 0.0000000
[2] => 0.0000000
)
)
[1019] => Array
(
[Standard 8] => Array
(
[0] => 1.0000000
[1] => 0.0000000
[2] => 0.0000000
[3] => 1.0000000
[4] => 0.0000000
[5] => 0.0000000
[6] => 0.0000000
)
[1] => 10/24/2017
)
[1017] => Array
(
[Standard 1] => Array
(
[0] => 0.0000000
)
[1] => 10/24/2017
[Standard 2] => Array
(
[0] => 1.0000000
[1] => 0.0000000
)
[Standard 3] => Array
(
[0] => 0.0000000
[1] => 0.0000000
)
[Standard 4] => Array
(
[0] => 1.0000000
)
[Standard 5] => Array
(
[0] => 0.0000000
)
[Standard 6] => Array
(
[0] => 0.0000000
)
[Standard 7] => Array
(
[0] => 1.0000000
)
[Standard 8] => Array
(
[0] => 0.0000000
)
[Standard 9] => Array
(
[0] => 1.0000000
)
)
)
)
我使用以下代码计算9种标准品的平均值。
$quizrow = array();
foreach ($modulet as $teacherid => $teacherlist) {
foreach ($teacherlist as $classid => $classlist) {
foreach ($classlist as $courseid => $quizlist) {
foreach ($quizlist as $quizid => $stdlist) {
$count = $total = 0;
$timemodified = $stdlist['timemodified'];
// Remove this element so we only have Standards.
unset($stdlist['timemodified']);
// Reorder the array so we get Standard 1, Standard 2, etc...
ksort($stdlist, 2);
foreach ($stdlist as $name => $std) {
$quizrow[$teacherid][$classid][$courseid][$quizid][0] = btr_get_quiz_name($quizid);
$quizrow[$teacherid][$classid][$courseid][$quizid][1] = $timemodified;
$quizrow[$teacherid][$classid][$courseid][$quizid][2] = "";
// Calculate the average of the Standards.
$average = round(array_sum($std) / count($std) * 100, 1) . "%";
$quizrow[$teacherid][$classid][$courseid][$quizid][$name] = $average;
$total += $average;
$count++;
}
// The second index will hold the average results for all Standards.
$quizrow[$teacherid][$classid][$courseid][$quizid][2] = round($total / $count, 1) . "%";
}
}
}
}
输出：
Array
(
[42715] => Array
(
[1886] => Array
(
[1252] => Array
(
[1016] => Array
(
[0] => Name
[1] => 10/24/2017
[2] => 62%
[Standard 1] => 91.7%
[Standard 2] => 100%
[Standard 3] => 0%
[Standard 4] => 100%
[Standard 5] => 66.7%
[Standard 6] => 66.7%
[Standard 7] => 100%
[Standard 8] => 33.3%
[Standard 9] => 0%
)
[1019] => Array
(
[0] => Name
[1] => 10/24/2017
[2] => 58.7%
[Standard 8] => 28.6%
)
[1017] => Array
(
[0] => Name
[1] => 10/24/2017
[2] => 49.3%
[Standard 1] => 0%
[Standard 2] => 50%
[Standard 3] => 0%
[Standard 4] => 100%
[Standard 5] => 0%
[Standard 6] => 0%
[Standard 7] => 100%
[Standard 8] => 0%
[Standard 9] => 100%
)
)
)
编辑更新：再次组织输出数组，以计算下一级别的平均值。
Array
(
[42715] => Array
(
[1886] => Array
(
[1252] => Array
(
[0] => Array
(
[0] => Name
[1] => Name
[2] => Name
)
[1] => Array
(
[0] => 10/24/2017
[1] => 10/24/2017
[2] => 10/24/2017
)
[2] => Array
(
[0] => 62%
[1] => 58.7%
[2] => 49.3%
)
[Standard 1] => Array
(
[0] => 91.7%
[1] => 0%
)
[Standard 2] => Array
(
[0] => 100%
[1] => 50%
)
[Standard 3] => Array
(
[0] => 0%
[1] => 0%
)
[Standard 4] => Array
(
[0] => 100%
[1] => 100%
)
[Standard 5] => Array
(
[0] => 66.7%
[1] => 0%
)
[Standard 6] => Array
(
[0] => 66.7%
[1] => 0%
)
[Standard 7] => Array
(
[0] => 100%
[1] => 100%
)
[Standard 8] => Array
(
[0] => 33.3%
[1] => 28.6%
[2] => 0%
)
[Standard 9] => Array
(
[0] => 0%
[1] => 100%
)
)
)
我再次使用foreach循环到最深层，使用非常相似的代码获得平均输出：
Array
(
[42715] => Array
(
[1886] => Array
(
[1252] => Array
(
[0] => Unit of Study: The Price of Fashion – 830L
[1] => 10/24/2017
[2] => 50.9%
[Standard 1] => 45.9%
[Standard 2] => 75%
[Standard 3] => 0%
[Standard 4] => 100%
[Standard 5] => 33.4%
[Standard 6] => 33.4%
[Standard 7] => 100%
[Standard 8] => 20.6%
[Standard 9] => 50%
)
)
我必须这样做，直到达到最新水平。
答案 0 :(得分：1)
[见过程说明的内联评论]
代码：（Demo）
function recursive_calculator($array){
foreach($array as $id=>&$elem){ // make every level modifiable
if(!isset($elem['timemodified'])){
$elem=recursive_calculator($elem); // I am using timemodified to indicate whether there are scores to process
}else{
$elem[0]='Quiz Name'; // btr_get_quiz_name($id);
$elem[1]=$elem['timemodified']; // store date with a new key
unset($elem['timemodified']); // remove old element
$score_sets=array_filter($elem,function($k){return strpos($k,'Standard ')===0;},ARRAY_FILTER_USE_KEY); // isolate quiz score subarrays only
foreach($score_sets as $name=>$scores){
$elem[$name]=($averages[]=round(array_sum($scores)/count($scores)*100,1))."%"; // double declaration, $averages will be used outside of the loop
}
$elem[2]=round(array_sum($averages)/count($averages),1)."%"; // calculate the cumulative average for all sets/quizzes
ksort($elem,SORT_NATURAL); // sort the data as desired
}
}
return $array; // return the full modified data structure
}
$modulet=[
42715=>[
1886=>[
1295=>[
1166=>[
'Standard 1'=>[0.5000000,0.5000000,1.0000000,0.5000000,0.5000000,0.5000000,0.5000000,0.5000000,0.5000000,0.5000000,0.5000000],
'timemodified'=>'10/23/2017',
'Standard 2'=>[0.0000000,1.0000000,1.0000000,1.0000000,0.0000000,0.0000000,0.0000000,0.0000000,1.0000000,0.0000000,0.0000000]
]
]
]
]
];
var_export(recursive_calculator($modulet));
输出：
array (
42715 =>
array (
1886 =>
array (
1295 =>
array (
1166 =>
array (
0 => 'Quiz Name',
1 => '10/23/2017',
2 => '45.5%',
'Standard 1' => '54.5%',
'Standard 2' => '36.4%',
),
),
),
),
)
答案 1 :(得分：0)
如果你只需要整个数组的值，而不关心索引，你可以这样做：
<?php
$a = array(array(array(array(array(1,2,3,4,5,99)))));
$it = new RecursiveIteratorIterator(new RecursiveArrayIterator($a));
$s = array();
foreach($it as $v) {
$s[] = $v;
}
echo(array_sum($s)/count($s));