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