将具有相同值的数组组合为键-PHP [英] Combine arrays with same value for a key - PHP

问题描述

我有一个多维数组

Array(
[0] => Array
    (
        [category_id] => 1
        [question_id] => 1
        [option_id] => 2
        [title] => Do you wear glasses?
        [answer] => no
    )

[1] => Array
    (
        [category_id] => 1
        [question_id] => 2
        [option_id] => 3
        [title] => Your hobbies ?
        [answer] => movies
    )

[2] => Array
    (
        [category_id] => 1
        [question_id] => 4
        [option_id] => 8
        [title] => what is your status?
        [answer] => single
    )

[3] => Array
    (
        [category_id] => 1
        [question_id] => 2
        [option_id] => 1
        [title] => Your hobbies ?
        [answer] => travel
    )
) 

其中第二和第四数组包含相同的问题（相同的类别ID和相同的问题ID）
组合具有相同类别ID和问题ID的数组。

In which 2nd and 4th array contains same question (same category id and same question id) I want to combine arrays having same category id and question id.

我期望的是这

Array(
[0] => Array
    (
        [category_id] => 1
        [question_id] => 1
        [option_id] => 2
        [title] => Do you wear glasses?
        [answer] => no
    )

[1] => Array
    (
        [category_id] => 1
        [question_id] => 2
        [option_id] => 3
        [title] => Your hobbies ?
        [answer] => movies,travel
    )

[2] => Array
    (
        [category_id] => 1
        [question_id] => 4
        [option_id] => 8
        [title] => what is your status?
        [answer] => single
    )
) 

表示仅合并其答案。请帮助...

Means combine its answers only. Please help ...

推荐答案

foreach($arr as $k=>$a)
{
    $common[$k] = search($arr,'category_id',$a['category_id'],'question_id',$a['question_id']);
    $answers = array_map(function($item) { return $item['answer']; }, $common[$k]);
    $options = array_map(function($item) { return $item['option_id']; }, $common[$k]);
    foreach($common[$k] as $temp)
    {
        $finalAns = $temp;
        $finalAns['answer'] = implode(",",$answers);
        $finalAns['option_id'] = implode(",",$options);
    }
    $final[] = $finalAns;
}

$final = array_map("unserialize", array_unique(array_map("serialize", $final)));
echo "<pre>";
print_r($final);

在公共功能文件或同一文件中放置以下功能。

Put Below function in your common function file or in same file.

function search($array, $key, $value, $key1, $value1)
{
    $results = array();

    if (is_array($array))
    {
        if (isset($array[$key]) && $array[$key] == $value && isset($array[$key1]) && $array[$key1] == $value1)
        {
            $results[] = $array;
        }

        foreach ($array as $subarray)
            $results = array_merge($results, search($subarray, $key, $value,$key1,$value1));
    }

    return $results;
}

您的输出将是

数组
（
[0] =>数组
（
[category_id] => 1
[question_id] => 1
[option_id ] => 2
[title] =>您戴眼镜吗？
[answer] =>否
）

Array ( [0] => Array ( [category_id] => 1 [question_id] => 1 [option_id] => 2 [title] => Do you wear glasses? [answer] => no )

[1] => Array
    (
        [category_id] => 1
        [question_id] => 2
        [option_id] => 3,1
        [title] => Your hobbies ?
        [answer] => movies,travel
    )

[2] => Array
    (
        [category_id] => 1
        [question_id] => 4
        [option_id] => 8
        [title] => what is your status?
        [answer] => single
    )

）

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