我怎么能在PHP中创建一个多维数组如下？

Question

Hi guys i am trying to create a multi dimensional array as the format bellow but i am struggling to do so, any help would be appreciated. Thank you.

    $movies = array();
    $sql = "SELECT u.username AS Username, group_concat(v.title) AS Video_title, group_concat(r.rate) AS Rating
    FROM `rating` AS r 
    JOIN `uploads` AS v ON r.video_id = v.vid_id 
    JOIN `users` as u ON u.user_id = r.rater_id 
    GROUP by Username" ;

    $query = mysqli_query($conn, $sql);

    while($result = mysqli_fetch_assoc($query)){
    $movies[] = $result;
    }

    foreach($movies as $k => $v){
    unset($movies[$k]);
    $movies[$v['Username']] = $v;
    }
    foreach($movies as $k => $v){
    unset($movies[$k]['Username']);
    }

    print_r($movies);

This is what i am currently getting:

     [user1] => Array ( [Video_title] => Snakes on the Plane,
                                         Superman Returns,
                                         The Night Listner,
                                         Lady in the Water,
                                         Just my Luck,
                                         You me and Dupree 
                         [Rating] => 3.5,
                                     3.5, 
                                     3,
                                     2.5,
                                     3,
                                     2.5 
                     ) )

But i am aiming to output it in the following format:

 'user1' => 
          array('Lady in the Water' => 2.5,
                'Snakes on a Plane' => 3.5, 
                'Just My Luck' => 3.0, 
                'Superman Returns' => 3.5,
                'You, Me and Dupree' => 2.5, 
                'The Night Listener' => 3.0
               )

Answer 1

You have to do it like below:-

  $movies = array();
    $sql = "SELECT u.username AS Username, group_concat(v.title) AS Video_title, group_concat(r.rate) AS Rating
    FROM `rating` AS r 
    JOIN `uploads` AS v ON r.video_id = v.vid_id 
    JOIN `users` as u ON u.user_id = r.rater_id 
    GROUP by Username" ;
    $query = mysqli_query($conn, $sql);

    while($result = mysqli_fetch_assoc($query)){
        $movies[] = $result;
    }

    $new_movies = array(); // a new array variable

    foreach($movies as $k => $v){
        $array_keys = explode(',',$v['Video_title']); // explode Video_title string into array
        $trimmed_array_key=array_map('trim',$array_keys); // trim all spaces from each value of $trimmed_array_key array
        $array_values = explode(',',$v['Rating']); // explode Rating array
        $trimmed_array_values=array_map('trim',$array_values);//remove all spaces from $trimmed_array_values array
        $new_movies[$v['Username']] = array_combine($trimmed_array_key,$trimmed_array_values); // combine $trimmed_array_key array and $trimmed_array_values array and assign to corresponding user
    }


    echo "<pre/>";print_r($new_movies); // print new array

Note:-

This line:-$trimmed_array_key=array_map('trim',$array_keys);

Will do something like below:-

https://eval.in/766605

reference:- http://php.net/manual/en/function.array-combine.php