1、使用php内置函数

 $a = [
['id'=>2,'name'=>'b'],
['id'=>1,'name'=>'a'],
['id'=>3,'name'=>'c'],
];
按照id 从小到大排序
$ids = array_column($a,'id');//[2,1,3]
array_multisort($ids,SORT_ASC,SORT_NUMERIC,$a);
print_r($a);
/*Array ( 
[0] => Array ( [id] => 1 [name] => a ) 
[1] => Array ( [id] => 2 [name] => b )
[2] => Array ( [id] => 3 [name] => c ) 
)*/按照name顺序 从大到小排序
$names = array_column($a,'name');//Array ( [0] => b [1] => a [2] => c )
array_multisort($names,SORT_DESC,SORT_STRING,$a);
print_r($a);
/*Array (
 [0] => Array ( [id] => 3 [name] => c ) 
 [1] => Array ( [id] => 2 [name] => b ) 
 [2] => Array ( [id] => 1 [name] => a ) 
 )*/  

2、自定义函数

 /*用于根据指定字段排序二维数组，保留原有键值
     *$arr---------输入二维数组
     *$var---------要排序的字段名
     */    function mymArrsort($arr,$var){
        $tmp=array();
        $rst=array();
        foreach($arr as $key=>$trim){
            $tmp[$key]=$trim[$var];
        }
        arsort($tmp);
        $i=0;
        foreach($tmp as $key1=>$trim1){
            $rst[$i]=$arr[$key1];
            $i=$i+1;
        }
        return $rst;
    }