search
Homephp教程php手册PHP 二维数组按某列进行排序

/* * 二维数组 按某列排序 * array_multisort($arr1,$arr2) * 手册 例子如下 * */ $data[] = array(volume = 67, edition = 2);$data[] = array(volume = 86, edition = 1);$data[] = array(volume = 85, edition = 6);$data[] = array(volume = 98, edition

/*
*  二维数组 按某列排序
*  array_multisort($arr1,$arr2)
*  手册 例子如下
*

*/

$data[] = array('volume' => 67, 'edition' => 2);
$data[] = array('volume' => 86, 'edition' => 1);
$data[] = array('volume' => 85, 'edition' => 6);
$data[] = array('volume' => 98, 'edition' => 2);
$data[] = array('volume' => 86, 'edition' => 6);
$data[] = array('volume' => 67, 'edition' => 7);

// 取得列的列表
foreach ($data as $key => $row) {
    $volume[$key]  = $row['volume'];
    $edition[$key] = $row['edition'];
}

// 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,'edition',SORT_DESC));

/*说白了 原理就是:
新数组    原二维数组
 2        array('volume' => 67, 'edition' => 2);
 1        array('volume' => 86, 'edition' => 1);
 6        array('volume' => 85, 'edition' => 6);
 2        array('volume' => 98, 'edition' => 2);
 6        array('volume' => 86, 'edition' => 6);
 7        array('volume' => 67, 'edition' => 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
*/

运行结果:

 7        array('volume' => 67, 'edition' => 7);

6        array('volume' => 86, 'edition' => 6);

6        array('volume' => 85, 'edition' => 6);

2        array('volume' => 98, 'edition' => 2);

2        array('volume' => 67, 'edition' => 2);

1        array('volume' => 86, 'edition' => 1);

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools