1 
     'zhangsan','age'=>26,'gender'=>'male','height'=>180), 5             array('name'=>'zhangsan','age'=>21,'gender'=>'female','height'=>156), 6             array('name'=>'zhangsan','age'=>59,'gender'=>'male','height'=>178) 7      8      9         );10 11 12 function array_sort($arr=array(),$key='',$sort=0){13     14     $arr_key = array();15     foreach ($arr as $k=>$v) {16         $arr_key[$k] = $v[$key];17         18     }19     ($sort == 0)?asort($arr_key):arsort($arr_key); 20     21     $return_arr = array();22     foreach ($arr_key as $k=>$v) {23     24     $return_arr[$k] = $arr[$k];25         26     }27     28     return $return_arr;29 }30 31 $arr_key = array_sort($arr,'age',0);32 33 print_r($arr_key);34 35 36 ?>