php二维数组多字段排序实现mysql order功能

左手的ㄟ右手 2022-07-19 01:14 191阅读 0赞

php二维数组多字段排序实现mysql order功能：即按照某个字段排序时如果字段相同，再按照第二个字段排序

使用php原生的array\_multisort()函数，执行速度会快些且降低自定义函数的依赖，关于array\_multisort详细使用 参考：http://blog.csdn.net/nuli888/article/details/52145187

<?php
    function sortByCols($list,$field){
    	$sort_arr=array();
    	$sort_rule='';
    	foreach($field as $sort_field=>$sort_way){
    		foreach($list as $key=>$val){
    			$sort_arr[$sort_field][$key]=$val[$sort_field];
    		}
    		$sort_rule .= '$sort_arr["' . $sort_field . '"],'.$sort_way.',';
    	}
    	if(empty($sort_arr)||empty($sort_rule)){ return $list; }
    	eval('array_multisort('.$sort_rule.' $list);');//array_multisort($sort_arr['parent'], 4, $sort_arr['value'], 3, $list);
    	return $list;
    }
    $list = array(
    	array('id' => 1, 'value' => '1-1', 'parent' => 1),
    	array('id' => 2, 'value' => '2-1', 'parent' => 1),
    	array('id' => 3, 'value' => '3-1', 'parent' => 1),
    	array('id' => 4, 'value' => '4-1', 'parent' => 2),
    	array('id' => 5, 'value' => '5-1', 'parent' => 2),
    	array('id' => 6, 'value' => '6-1', 'parent' => 3),
    );
    $list = sortByCols($list, array(
    	'parent' => SORT_ASC, 
    	'value' => SORT_DESC,
    ));
    print_r($list);exit;

Array  
(  
    \[0\] => Array  
        (  
            \[id\] => 3  
            \[value\] => 3-1  
            \[parent\] => 1  
        )  
  
  
    \[1\] => Array  
        (  
            \[id\] => 2  
            \[value\] => 2-1  
            \[parent\] => 1  
        )  
  
  
    \[2\] => Array  
        (  
            \[id\] => 1  
            \[value\] => 1-1  
            \[parent\] => 1  
        )  
  
  
    \[3\] => Array  
        (  
            \[id\] => 5  
            \[value\] => 5-1  
            \[parent\] => 2  
        )  
  
  
    \[4\] => Array  
        (  
            \[id\] => 4  
            \[value\] => 4-1  
            \[parent\] => 2  
        )  
  
  
    \[5\] => Array  
        (  
            \[id\] => 6  
            \[value\] => 6-1  
            \[parent\] => 3  
        )  
  
  
)