$data = [  {id=>1,name=>a,age=>a},  {id=>1,name=>b,age=>b},  {id=>2,name=>c,age=>c},  {id=>3,name=>f,age=>f},  {id=>2,name=>d,age=>d},];

$data = [  [id=>1,user_info=>[[name=>a,age=>a],[name=>b,age=>b]]],  [id=>2,user_info=>[[name=>c,age=>c],[name=>d,age=>d]]],  [id=>3,user_info=>[[name=>f,age=>f]]],];

/** * 數組獲取黑名單內的數據 * @param array $arr 源數組 * @param array $list 白名單 * @return array * @example * $arr = ['a'=>1,'b'=>2,'c'=>3,'d'=>4] * $list = ['d','c']; * $return = ['a'=>1,'b'=>2]; */public function array_black_list(Array $arr, Array $list){  return array_diff_key($arr, array_flip($list));}

/** * 數組獲取白名單內的數據 * @param array $arr 源數組 * @param array $list 白名單 * @return array * @example * $arr = ['a'=>1,'b'=>2,'c'=>3,'d'=>4] * $list = ['d','c']; * $return = ['c'=>3,'d'=>4]; */public function array_white_list(Array $arr, Array $list){  return array_intersect_key($arr, array_flip($list));}

/** * repeat數據處理(一般是leftJoin數據結構完善) * leftJoin 查詢出來的多組數據, 根據primary_id進行數據結構修改, 保存為 字段=>[{},{},{}]類似結構 * 效果:$data = [{id=>1,name=>a,age=>a},{id=>1,name=>b,age=>b},{id=>2,name=>c,age=>c},{id=>3,name=>null,age=>null}],$fieldArr = ['name','age'] * return [{id=>1,repeat_info=>[{name=>a,age=>a},{name=>b,age=>b}]},{id=>2,repeat_info=>[{name=>c,age=>c}]},{id=>3,repeat_info=>[]}] * @param $data  array 原數據; * @param $fieldArr array 需要的字段, * @param string $primary_key 重復的數據 憑證;(一般用主鍵id) * @param string $repeat_name 重復的數據要保存數組的 字段名 * @return array */public function dealRepeatData(Array $data, Array $fieldArr, $primary_key = 'id', $repeat_name = 'repeat_info'){  $res = [];  //通過黑名單獲取不重復的值, 歸并到按id分類的數組里;  foreach ($data as $nre) {    $res[$nre[$primary_key]] = $res[$nre[$primary_key]] ?? $this->array_black_list($nre, $fieldArr);  }  //通過白名單獲取重復的值, 歸并到黑名單的$repeat_name 字段里;  foreach ($data as $re) {    $res[$re[$primary_key]][$repeat_name][] = $this->array_white_list($re, $fieldArr);  }  return array_values($res);}