我有一个关联的多维数组，如下所示

$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  )
    )

我需要根据上述数组中的相似元素创建新数组。意味着我必须创建数组组。例如，类元素具有重复的第 1 年和第 2 年值。所以它应该创建独特元素的数组。然后类是父数组，在类数组中应该有基于分支的数组，在 brance Exam 数组中，在 Exam 数组中应该有学生姓名和简历的关联数组。

所以基本上数组应该是这样的

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"
                )
            )
        )
    )
);

要基于类创建组，我喜欢下面的类，它工作正常，但如何在其中创建数组

$classgroup = array();  
    foreach($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
    }

--------------------------------编辑------------ ------------------------

来自下面的循环

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 o/p 但如果我需要另一个这样的 o/p

预期开工时间

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'
                        ),
                )
        ),
)

我试过跟随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"]);
}

最佳答案

循环中的一行!

foreach($data as $array){
        $grouped[$array["class"]][$array["branch"]][$array["Exam"]][]=array("student name"=>$array["student name"],"Bio"=>$array["Bio"]);
}

$grouped 产生:

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
                )
            )
        )
    )
)

您的跟进案例更有趣/更具挑战性。我不得不清除一些我不经常使用的功能。检查一下:

<?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>";

输出与您要求的不一样，但我认为您只是展示了它的一般外观。如果这不太正确，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
            )
        )
    )
)

关于循环中的PHP数组组并创建多维数组，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42474165/