PHP method to implement two-dimensional array sorting by a certain column

PHP method to implement two-dimensional array sorting by a certain column_php skills

墨辰丷

Release： 2023-03-28 14:32:01

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This article mainly introduces the method of PHP to implement two-dimensional array sorting by a certain column. It analyzes the skills of PHP two-dimensional array sorting in the form of examples. It involves the use of the array_multisort function. Friends who need it can refer to it

The details are as follows:

/*
* 二维数组 按某列排序
* array_multisort($arr1,$arr2)
* 手册 例子如下
*
*/
$data[] = array(&#39;volume&#39; => 67, &#39;edition&#39; => 2);
$data[] = array(&#39;volume&#39; => 86, &#39;edition&#39; => 1);
$data[] = array(&#39;volume&#39; => 85, &#39;edition&#39; => 6);
$data[] = array(&#39;volume&#39; => 98, &#39;edition&#39; => 2);
$data[] = array(&#39;volume&#39; => 86, &#39;edition&#39; => 6);
$data[] = array(&#39;volume&#39; => 67, &#39;edition&#39; => 7);
// 取得列的列表
foreach ($data as $key => $row) {
  $volume[$key] = $row[&#39;volume&#39;];
  $edition[$key] = $row[&#39;edition&#39;];
}
// 将数据根据 volume 降序排列，根据 edition 升序排列
// 把 $data 作为最后一个参数，以通用键排序
array_multisort($volume, SORT_DESC, $edition, SORT_ASC, $data);
/*************************************/
/* 从上面的例子不难看出，array_multisort()函数
* 是将每一个二维数组的列作为 一个参数进行排序
* 来达到整个数组的排序
*/
/*************************************/
function sigcol_arrsort($data,$col,$type=SORT_DESC){
  if(is_array($data)){
    $i=0;
    foreach($data as $k=>$v){
      if(key_exists($col,$v)){
        $arr[$i] = $v[$col];
        $i++;
      }else{
        continue;
      }
    }
  }else{
    return false;
  }
  array_multisort($arr,$type,$data);
  return $data;
}
print_r(sigcol_arrsort($data,&#39;edition&#39;,SORT_DESC));
/*说白了 原理就是：
新数组  原二维数组
 2    array(&#39;volume&#39; => 67, &#39;edition&#39; => 2);
 1    array(&#39;volume&#39; => 86, &#39;edition&#39; => 1);
 6    array(&#39;volume&#39; => 85, &#39;edition&#39; => 6);
 2    array(&#39;volume&#39; => 98, &#39;edition&#39; => 2);
 6    array(&#39;volume&#39; => 86, &#39;edition&#39; => 6);
 7    array(&#39;volume&#39; => 67, &#39;edition&#39; => 7);
这两个数组的每一行都锁在一起，新数组一旦变动顺序，
那么就会连带每一行的二维数组也跟着变换顺序 ，即新数组为参照物
相当于查询子句中的 order by
*/

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Running results:

Array
(
  [0] => Array
    (
      [volume] => 67
      [edition] => 7
    )
  [1] => Array
    (
      [volume] => 85
      [edition] => 6
    )
  [2] => Array
    (
      [volume] => 86
      [edition] => 6
    )
  [3] => Array
    (
      [volume] => 67
      [edition] => 2
    )
  [4] => Array
    (
      [volume] => 98
      [edition] => 2
    )
  [5] => Array
    (
      [volume] => 86
      [edition] => 1
    )
)

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The above is the entire content of this article, I hope it will be helpful to everyone's study.

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