求助：php处理这个数组

Question

$data源码如下：

$data = [
    [
        'id'           => '2',
        'one_day'      => '2018-09-30',
        'teacher_id'   => '1',
        'teacher_name' => '张老师',
    
        'student_id'   => '8',
        'student_name' => '张一',
        'form_done_id' => '13',
    ],

    [
        'id'           => '2',
        'one_day'      => '2018-09-30',
        'teacher_id'   => '1',
        'teacher_name' => '张老师',
    
        'student_id'   => '14',
        'student_name' => '张二',
        'form_done_id' => '14',
    ]
];

望不吝赐教，谢谢！！！

Answer 1

思路：

1. array_walk数组
2. 根据teacher_id字段分组
3. 然后student_id字段下student分组到上一个数组子数组

代码

$data = [
    [
        'id'           => '2',
        'one_day'      => '2018-09-30',
        'teacher_id'   => '1',
        'teacher_name' => '张老师',
    
        'student_id'   => '8',
        'student_name' => '张一',
        'form_done_id' => '13',
    ],

    [
        'id'           => '2',
        'one_day'      => '2018-09-30',
        'teacher_id'   => '1',
        'teacher_name' => '张老师',
    
        'student_id'   => '14',
        'student_name' => '张二',
        'form_done_id' => '14',
    ]
];

$result = [];
array_walk($data, function($v, $i) use (&$result) {
    if (!isset($result[$v['id']])) {
        $result[$v['id']] = [
            'id'           => $v['id'],
            'one_day'      => $v['one_day'],
            'teacher_id'   => $v['teacher_id'],
            'teacher_name' => $v['teacher_name'],
        ];
    }
    
    $result[$v['id']]['student_list'][] = [
            'student_id'   => $v['student_id'],
            'student_name' => $v['student_name'],
            'form_done_id' => $v['form_done_id'],
        ];
    
});

$result = array_values($result);

var_dump($result);

output

array(1) {
  [0]=>
  array(5) {
    ["id"]=>
    string(1) "2"
    ["one_day"]=>
    string(10) "2018-09-30"
    ["teacher_id"]=>
    string(1) "1"
    ["teacher_name"]=>
    string(9) "张老师"
    ["student_list"]=>
    array(2) {
      [0]=>
      array(3) {
        ["student_id"]=>
        string(1) "8"
        ["student_name"]=>
        string(6) "张一"
        ["form_done_id"]=>
        string(2) "13"
      }
      [1]=>
      array(3) {
        ["student_id"]=>
        string(2) "14"
        ["student_name"]=>
        string(6) "张二"
        ["form_done_id"]=>
        string(2) "14"
      }
    }
  }
}

Answer 2

$common = array_intersect($data[0],$data[1]); //交集
$diff1 = array_diff($data[0],$common);//差集
$diff2 = array_diff($data[1],$common);
$common['student_list']=[$diff1,$diff2];
var_dump($common);

Answer 3

$data = [

[
    'id'           => '2',
    'one_day'      => '2018-09-30',
    'teacher_id'   => '1',
    'teacher_name' => '张老师',

    'student_id'   => '8',
    'student_name' => '张一',
    'form_done_id' => '13',
],

[
    'id'           => '2',
    'one_day'      => '2018-09-30',
    'teacher_id'   => '1',
    'teacher_name' => '张老师',

    'student_id'   => '14',
    'student_name' => '张二',
    'form_done_id' => '14',
],
[
    'id'           => '3',
    'one_day'      => '2018-09-30',
    'teacher_id'   => '1',
    'teacher_name' => '牛老师',

    'student_id'   => '15',
    'student_name' => '张八',
    'form_done_id' => '17',
]

];
$arr = $newarr = [];
foreach($data as $key=>$val){

 $pre_id = $val['id'];
 $arr[$key] = array_splice($val,4);
 $arr[$key]['pre_id'] = $pre_id;
 $newarr[$key] = array_splice($val,0,4);  

}
$info = a_array_unique($newarr);
$newdata = $cc = [];
var_dump($info);
var_dump($arr);
foreach($arr as $k=>$v){

foreach($info as $kk=>$vv){
    $newdata[$kk] = $vv;
    if($v['pre_id'] == $vv['id']){
         $cc[$v['pre_id']]['list'][] = $v;

    } 
}

}

$zhongji = [];
foreach($newdata as $aa=>$bb){

foreach($cc as $dd=>$ee){
    if($bb['id'] == $dd){
        $zhongji[] = array_merge($bb,$ee);
    }
}

}

function a_array_unique($array){

$out = array();

foreach ($array as $key=>$value) {
    if (!in_array($value, $out)){
        $out[$key] = $value;
    }
}

$out = array_values($out);
return $out;

}
来个比较笨的方法