一维数组排序可以使用asort(升序)/ksort(降序),二维数组排序可以使用array_mutisort和usort进行排序

     1,'age'=>'12'),array('id'=>2,'age'=>'13'),array('id'=>3,'age'=>'44'),array('id'=>4,'age'=>'22'),array('id'=>5,'age'=>'11'));$ages = array();foreach ($users as $key => $val) {    $ages[] = $val['age'];}  echo "
";print_r($ages); //升序排列age,按照age的顺序排列$usersarray_multisort($ages, SORT_ASC, $users);print_r($users);//使用这个方法，会比较麻烦些，要将age提取出来存储到一维数组里，然后按照age升序排列。/*执行后，$users就是排序好的数组了，可以打印出来看看。如果需要先按年龄升序排列，再按照ID升序排列，方法同上，就是多提取一个名称数组出来，最后的排序方法这样调用代码如下:array_multisort($ages, SORT_ASC, $ID, SORT_ASC, $users);*//*(    [0] => 12    [1] => 13    [2] => 44    [3] => 22    [4] => 11)Array(    [0] => Array        (            [id] => 5            [age] => 11        )    [1] => Array        (            [id] => 1            [age] => 12        )    [2] => Array        (            [id] => 2            [age] => 13        )    [3] => Array        (            [id] => 4            [age] => 22        )    [4] => Array        (            [id] => 3            [age] => 44        ))*/