array_multisort()函数对多个数组或多维数组进行排序。//对数组$hotcat按照count键值大小降序进行排序；$hotcat =array( array(‘1501‘=>array(‘catid‘=>‘1546‘,‘catname‘=>‘数组排序 一级‘,‘count‘=>‘588‘)), array(‘1501‘=>array(‘catid‘=>‘1546‘,‘catname‘=>‘数组排序二级‘,‘count‘=>‘588‘)), array(‘1501‘=>array(‘catid‘=>‘1546‘,‘catname‘=>‘数组排序 三级‘,‘count‘=>‘588‘)));//提取列数组；foreach ($hotcat as $key => $val) { $tmp[$key] = $row[‘username‘];}array_multisort($tmp,SORT_DESC,$hotcat);此处对数组进行降序排列；SORT_DESC按降序排列array_sort()进行排序//指定数组以$keys键值排序function array_sort($array,$keys,$type=‘asc‘){//$array为要排序的数组,$keys为要用来排序的键名,$type默认为升序排序$keysvalue = $new_array = array();foreach ($array as $k=>$v){$keysvalue[$k] = $v[$keys];}if($type == ‘asc‘){asort($keysvalue);}else{arsort($keysvalue);}reset($keysvalue);foreach ($keysvalue as $k=>$v){$new_array[$k] = $array[$k];}return $new_array;}原文：https://www.cnblogs.com/luqiang213917/p/9367560.html