Two methods of merging two-dimensional arrays in PHP_PHP tutorial

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	复制代码
$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,',
  * )
 */
?>

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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...