Two methods of merging two-dimensional arrays in PHP

Two methods of merging two-dimensional arrays in PHP_PHP tutorial

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Release： 2016-07-13 10:50:08

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Yesterday I also wrote a technical article about array merging. There I introduced the merging of one-dimensional arrays. Here I will introduce the merging method of two-dimensional arrays in PHP. I hope it will be helpful to all students.

Example 1

Custom method to merge arrays

Look at a two-dimensional array first:

The code is as follows

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代码如下

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Array (

[0] => Array (

[A] => store_name

[B] => 商店一

)

[1] => Array (

[A] => store_owner

[B] => 小风

)

[2] => Array (

[A] => store_name

[B] => 商店二

)

[3] => Array (

[A] => store_owner

[B] => 小磊

)

大家会发现里面有两个 store_name 和 store_owner ,所以我想让他们合并成下面这样

Array (

[0] => Array

(

[A] => 商店一

[B] => 小风

)

[1] => Array

(

[A] => 商店二

[B] => 小磊

)

Array (<🎜> <🎜> [0] => Array (<🎜> <🎜> <🎜> <🎜> )<🎜> <🎜> [1] => Array (<🎜> <🎜> <🎜> <🎜> )<🎜> <🎜> [2] => Array (<🎜> <🎜> <🎜> <🎜> )<🎜> <🎜> [3] => Array (<🎜> <🎜> <🎜> <🎜> )<🎜> <🎜>?> You will find that there are two store_name and store_owner inside, so I want to merge them into something like this <🎜>Array (<🎜> <🎜> [0] => Array<🎜> <🎜> (<🎜> <🎜> > ) [1] => Array ( [B] => ) ?>

The merging method is as follows:

The code is as follows

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代码如下

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$stores = array(); //定义一个空数组
$store_count=count($showinfo); //统计显示的次数，这里的$showinfo是我获取数据库内容时的一个变量，然后打印出来就是上面刚开始的样子
for($i=0;$i<$store_count;$i++)
{
$j=$i+1; //将 $i 加 1 跳过一级相当于 $j 取得是键值为奇数的值
$stores[]=array(
'name' =>$showinfo[$i]['value'],
                          'owner'=>$showinfo[$j]['value'],
                          );
            $i = $j; // 这里的作用是相当于 $i 取得是键值为偶数的值
        }

$stores = array(); //Define an empty array
$store_count=count($showinfo); //Count the number of times displayed. $showinfo here is a variable when I get the database content, and then print it out as it did at the beginning
for($i=0;$i<$store_count;$i++)
                                  {
              $stores[]=array(
‘name’ =>$showinfo[$i]['value'],
‘owner’=>$showinfo[$j]['value'],
);
                  $i = $j; // The function here is equivalent to $i getting the value whose key value is an even number
} ?>

In this way you can get the above results!

In order to let everyone see it more clearly, I wrote out the database table structure. The main fields are as follows:

key value

store_name online store one

store_owner Xiaofeng

store_name online store 2

store_owner Xiao Lei

After using the above method, the front page can be displayed in a row, as follows

name owner

Online Shop 1 Xiaofeng

Online Shop 2 Xiao Lei

Example 3

The code is as follows

代码如下

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$arr = array
(
0 => array(
    '1@01,02',
    '2@01,02',
    '4@ALL',
    '3@01',
    '5@01,02,04',
    ),

    1 => array(
    '1@01,02,03',
    '2@01,02,04',
    '3@ALL',
    '4@01,02',
    '111@01,05',
    '5@03',
    ),
    2 => array(
    '1@01,02,03',
    '2@02,03,05',
    '3@ALL',
    '4@01,02,03',
    '111@01,05',
    '5@03',
    ),
);
$result = array();
foreach($arr as $items){
    if(is_array($items)){
        foreach($items as $item){
            $item = explode('@', $item);
            if(count($item) != 2){
                continue ;
            }
            $result[$item[0]] .= $item[1].',';
        }
    }
}
function reJoin(&$item,$key,$seq){
    $list = array_unique(explode($seq,$item));
    if (in_array('ALL', $list)){
        $item = $key.'@ALL';
    }else{
        $item = $key.'@'.join($seq,$list);
    }
}
array_walk($result, 'reJoin',',');
sort($result);
var_export($result);
/**
* array (
* 0 => '111@01,05,',
* 1 => '1@01,02,03,',
* 2 => '2@01,02,04,03,05,',
* 3 => '3@ALL',
* 4 => '4@ALL',
* 5 => '5@01,02,04,03,',
* )
*/
?>

Copy code

$arr = array
(
0 => array(
'1@01,02',
'2@01,02',
'4@ALL',
'3@01',
'5@01,02,04',
),

1 => array(
'1@01,02,03',
'2@01,02,04',
'3@ALL',
'4@01,02',
'111@01,05',
'5@03',
),
2 => array(
'1@01,02,03',
'2@02,03,05',
'3@ALL',
'4@01,02,03',
'111@01,05',
'5@03',
),
);
$result = array();
foreach($arr as $items){
If(is_array($items)){
          foreach($items as $item){
               $item = explode('@', $item);
If(count($item) != 2){
continue ;
             }
                $result[$item[0]] .= $item[1].',';
         }
}
}
function reJoin(&$item,$key,$seq){
$list = array_unique(explode($seq,$item));
If (in_array('ALL', $list)){
         $item = $key.'@ALL';
}else{
          $item = $key.'@'.join($seq,$list);
}
}
array_walk($result, 'reJoin',',');
sort($result);
var_export($result);
/**
* array (
* 0 => '111@01,05,',
* 1 => '1@01,02,03,',
* 2 => '2@01,02,04,03,05,',
* 3 => '3@ALL',
* 4 => '4@ALL',
* 5 => '5@01,02,04,03,',
* )
*/
?>

true

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TechArticleYesterday I also wrote a technical article about array merging, where I introduced one-dimensional array merging. Here is an introduction to the merging method of two-dimensional arrays in PHP. I hope it will be helpful to all students...