循环中的PHP数组组和创建多维数组
循环中的PHP数组组和创建多维数组
提问于 2017-02-26 20:55:31
我有一个关联的多维数组如下
$data = array();
$data = Array (
[0] => Array ( [class] => 1styear [branch] => IT [Exam] => SEM1 [student name] => Alex [Bio] => Good Boy )
[1] => Array ( [class] => 2ndyear [branch] => Finance [Exam] => SEM1 [student name] => Mark [Bio] => Intelligent )
[2] => Array ( [class] => 2ndyear [branch] => IT [Exam] => SEM1 [student name] => Shaun [Bio] => Football Player )
[3] => Array ( [class] => 1styear [branch] => Finance [Exam] => SEM2 [student name] => Mike [Bio] => Sport Player )
[4] => Array ( [class] => 1styear [branch] => IT [Exam] => SEM2 [student name] => Martin [Bio] => Smart )
[5] => Array ( [class] => 1styear [branch] => IT [Exam] => SEM1 [student name] => Philip [Bio] => Programmer )
)我需要基于以上数组中类似的元素创建新的数组。意味着我必须创建数组组。例如，类元素具有重复的1年和2年值。所以它应该创造出一系列独特的元素。再一次，类是父数组，类内数组应该是基于分支的数组，内部是brance考试数组，内部是考试数组，应该是学生姓名和生物的关联数组。
所以基本上数组应该如下所示
array(
"1styear" => array(
"IT" => array(
"SEM1" => array(
array(
"student name" => "Alex",
"Bio" => "Good Boy"
),
array(
"student name" => "Philip",
"Bio" => "Programmer"
)
),
"SEM2" => array(
array(
"student name" => "Martin",
"Bio" => "Smart"
)
)
)
),
"2ndyear" => array(
"Finance" => array(
"SEM1" => array(
array(
"student name" => "Mark",
"Bio" => "Intelligent"
)
),
"SEM2" => array(
array(
"student name" => "Mike",
"Bio" => "Sport Player"
)
)
)
)
);为了使组基于类，我确实喜欢下面的方法，它工作得很好，但是如何在这个类中创建数组
$classgroup = array();
foreach($data as $inarray){
$classgroup[$inarray['class']][] = $inarray;
}
$classarray = array();
foreach($classgroup as $key => $value){
echo $key; // output is 1styear and secondyear
create array like above
}---------------------------------EDIT----------------------------------
从下面的循环中
foreach($data as $array){
$grouped[$array["class"]][$array["branch"]][$array["Exam"]][]=array("student name"=>$array["student name"],"Bio"=>$array["Bio"]);
} 我得到了预期的交单，但如果我还需要这样的话
预期交货期
array(
'1styear' =>
array (
0 =>
array(
'Exam' => 'SEM1',
'branch' =>
array (
0 => 'IT'
),
),
1 =>
array(
'Exam' => 'SEM2',
'branch' =>
array (
0 => 'IT'
),
),
),
'2ndyear' =>
array (
0 =>
array(
'Exam' => 'SEM1',
'branch' =>
array (
0 => 'Finance',
),
),
1 =>
array(
'Exam' => 'SEM2',
'branch' =>
array (
0 => 'Finance'
),
)
),
)我尝试了下面的循环，但没有得到预期的o/p。
foreach($data as $array){
$grouped[$array["class"]][]=array("Exam"=>$array["Exam"],"branch"=>$array["branch"]);
}回答 2
Stack Overflow用户
回答已采纳
发布于 2017-02-27 03:38:04
一条条线在一个回路里！
foreach($data as $array){
$grouped[$array["class"]][$array["branch"]][$array["Exam"]][]=array("student name"=>$array["student name"],"Bio"=>$array["Bio"]);
}$grouped生产：
Array(
[1styear] => Array(
[IT] => Array(
[SEM1] => array(
[0] => array(
[student name] => Alex,
[Bio] => Good Boy
),
[1] => array(
[student name] => Philip,
[Bio] => Programmer
)
),
[SEM2] => array(
[0] => array(
[student name] => Martin,
[Bio] => Smart
)
)
),
[Finance] => array(
[SEM2] => array(
[0] => array(
[student name] => Mike,
[Bio] => Sport Player
)
)
)
),
[2ndyear] => array(
[Finance] => array(
[SEM1] => array(
[0] => array(
[student name] => Mark,
[Bio] => Intelligent
)
)
),
[IT] => array(
[SEM1] => array(
[0] => array(
[student name] => Shaun,
[Bio] => Football Player
)
)
)
)
)你的后续案例，要有趣得多，更具挑战性。我不得不把一些我不常参加的活动弄掉。看看这个：
<?php
$data = array (
array ( "class"=>"1styear","branch"=>"IT","Exam"=>"SEM1","student name"=>"Alex","Bio"=>"Good Boy"),
array ( "class"=>"2ndyear","branch"=>"Finance","Exam"=>"SEM1","student name"=>"Mark","Bio"=>"Intelligent" ),
array ( "class"=>"2ndyear", "branch"=>"IT","Exam"=>"SEM1","student name"=>"Shaun","Bio"=>"Football Player" ),
array ( "class"=>"1styear","branch"=>"Finance","Exam"=>"SEM2","student name"=>"Mike","Bio"=>"Sport Player" ),
array ( "class"=>"1styear","branch"=>"IT","Exam"=>"SEM2","student name"=>"Martin","Bio"=>"Smart"),
array ( "class"=>"1styear","branch"=>"IT","Exam"=>"SEM1","student name"=>"Philip","Bio"=>"Programmer" )
);
$class_keys=array_unique(array_column($data,"class")); // create array of unique class values
$Exam_keys=array_unique(array_column($data,"Exam")); // create array of unique Exam values
foreach($class_keys as $class_key){
$i=0; // "class" subarray index
foreach($Exam_keys as $Exam_key){
$q=array("class"=>$class_key,"Exam"=>$Exam_key); // this array can have 1 or more pairs
// create an array only of rows where $q's key-value pairs exist
$qualifying_array=array_filter(
$data,
function($val)use($q){
if(count(array_intersect_assoc($val,$q))==count($q)){ // total pairs found = total pairs sought
return $val;
}
},
ARRAY_FILTER_USE_BOTH
);
foreach($qualifying_array as $qa){ // push appropriate values into array
$grouped2[$class_key][$i]["Exam"]=$qa["Exam"];
$grouped2[$class_key][$i]["branch"][]=$qa["branch"];
}
if(isset($grouped2[$class_key][$i]["branch"])){ // ensure no duplicate values in "branch" subarray
$grouped2[$class_key][$i]["branch"]=array_unique($grouped2[$class_key][$i]["branch"]);
}
++$i; // increment the index for each "class" subarray
}
}
echo "<pre>";
print_r($grouped2);
echo "</pre>";输出与您所要求的不完全相同，但我认为您只是显示了一般情况下应该是什么样子。如果这不太对，请告诉我。
array(
[1styear]=>array(
[0]=>array(
[Exam]=>SEM1
[branch]=>array(
[0]=>IT
)
),
[1]=>array(
[Exam]=>SEM2
[branch]=>array(
[0]=>Finance,
[1]=>IT
)
)
),
[2ndyear]=>array(
[0]=>array(
[Exam]=>SEM1
[branch]=>array(
[0]=>Finance,
[1]=>IT
)
)
)
)Stack Overflow用户
发布于 2017-02-26 22:05:06
也许像这样的东西(没有测试)？
$newData = [];
foreach ($data as $row) {
$student = [
'student name' => $row['student name'],
'Bio' => $row['Bio']
];
$newData[$row['class']][$row['branch']][$row['exam']][] = $student;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/42474165
复制相关文章
相似问题
腾讯云开发者
