Question

在PHP中，我有一个名为$ listing的二维数组，它将包含具有以下结构的数据：

(
    [1] => Array
        (
            [category] => tech
            [business_name] => Apple
        )

    [2] => Array
        (
            [category] => food
            [business_name] => McDonalds
        )

    [3] => Array
        (
            [category] => tech
            [business_name] => Dell
        )

)

我希望以 category （按字母顺序排列），然后* business_name *（按字母顺序排序）分组的纯文本输出。请注意，这只是其显示方式的一个子集 - 可能有50个类别和1000个列表 - 因此代码需要考虑到这一点。

因此，如上所述使用$ listing的输出，我需要输出如下所示：

category: food
business_name: McDonalds

category: tech
business_name: Apple
business_name: Dell

请帮助。提前谢谢。

Answer 1

有很多方法可以做到这一点，但这应该让你开始。

$data = array();

foreach ($listing as $item) {
    $data[$item['category']][] = $item['business_name'];
}

ksort($data);

$data = array_map(function($names) {
    sort($names);
    return $names;
}, $data);

未经测试...

Answer 2

看看PHP多阵列排序 http://www.php.net/manual/en/function.array-multisort.php对您的数组进行多重排序，看看是否有帮助

Answer 3

我用array_multisort() 功能。请看下面的代码。

                         <?php

                //array to sort 
                $data[0] = array('category'=> 'tech','business_name' => 'apple')  ;
                $data[1] = array('category'=> 'food','business_name' => 'McDonalds')  ;
                $data[2] = array('category'=> 'tech','business_name' => 'dell')  ;
                $data[3] = array('category'=> 'food','business_name' => 'subway')  ;

                foreach($data as $key => $val){
                 $cat[$key] = $val['category'];
                 $bus[$key] = $val['business_name'];
                }

                // Sort the data with category and business_name with ascending order
                array_multisort($cat, SORT_ASC, $bus, SORT_ASC, $data);
       //         echo "<pre>";print_r($data);echo "</pre>";unset($val);

                //put the category as key And business name as value with comma seperated.
                $category = array();
                foreach($data as $key => $val){
                    if(array_key_exists($val['category'],$category ))
                    {
                        $category[$val['category']] = $category[$val['category']].', '.$val['business_name'];
                    }
                    else
                    {
                        $category[$val['category']] = $val['business_name']; // $category 
                    }   
                }

                //print the sorted data

                foreach($category as $key => $val){
                    //print category
                    echo "<br /> <br />Category: ".$key;
                    $b_name = explode(',', $val);
                    //to print busniess name
                    foreach($b_name as $k => $v){
                        echo "<br />Business Name: ".$v;
                    }
                 }


                ?>




        //OUTPUT


       Category: food
       Business Name: McDonalds
       Business Name: subway

       Category: tech
       Business Name: apple
       Business Name: dell

PHP - 多维数组的自定义输出

3 个答案: