PHP 多维数组的排序问题 根据二维数组中某个项排序 |
本文标签:多维数组 PHP内置函数 array_multisort 要求每个数组大小一样 $areas是地区的二维数组,包含人数和次数,现在要按这2种数进行降序排序 复制代码 代码如下: foreach($areaArray as &$areas) { $times = $numbers = array(); foreach($areas as $province => $v) { $times[$province] = $v[times]; $numbers[$province] = $v[numbers]; } array_multisort($times, SORT_DESC, $numbers, SORT_DESC, $areas); } 比如有个多为数组: 复制代码 代码如下: $arr = array( ‘d => array(‘id => 5, ‘name => 1, ‘age => 7), ‘b => array(‘id => 2,name => 3,age => 4), ‘a => array(‘id => 8,name => 10,age => 5), ‘c => array(‘id => 1,name => 2,age => 2) ); 需要对二维数组中的 age 项排序 。 需要用到PHP的内置函数 array_multisort(),可以看手册 。 自定义函数: 复制代码 代码如下: function multi_array_sort($multi_array,$sort_key,$sort=SORT_ASC){ if(is_array($multi_array)){ foreach ($multi_array as $row_array){ if(is_array($row_array)){ $key_array[] = $row_array[$sort_key]; }else{ return false; } } }else{ return false; } array_multisort($key_array,$sort,$multi_array); return $multi_array; } //处理 echo “<pre/>”; print_r(multi_array_sort($arr,age));exit; //输出 Array ( [c] => Array ( [id] => 1 [name] => 2 [age] => 2 ) [b] => Array ( [id] => 2 [name] => 3 [age] => 4 ) [a] => Array ( [id] => 8 [name] => 10 [age] => 5 ) [d] => Array ( [id] => 5 [name] => 1 [age] => 7 ) ) written by 大宇 0 |