Insert data into the database from checkbox array using Codeigniter

[fatchul]

I want to insert data into the database from checkbox[array] using
Codeigniter.
My case is User check assesmen criteria base from checkbox form, then
my Controller process it when checkbox is check then value is 1, if
uncheck then 0. Here is my view

ID | Trimester I | Trimester II | Trimester III |
21 | checbox_trimester_i[] | checbox_trimester_ii[] | checbox_trimester_iii[]
42 | checbox_trimester_i[] | checbox_trimester_ii[] | checbox_trimester_iii[]
23 | checbox_trimester_i[] | checbox_trimester_ii[] | checbox_trimester_iii[]

I want to insert into table ‘assesmen’. Here is my column in DB

ID | ID_pk | Trimester_1 | Trimester_2 | Trimester_3 |
1 | 21 | 1 | 0 | 1
2 | 42 | 0 | 1 | 1
3 | 23 | 1 | 0 | 0

Note * :

ID_pk = ID
Trimester_1 => checbox_trimester_i[]
Trimester_2 => checbox_trimester_ii[]
Trimester_3 => checbox_trimester_iii[]

Here is my View form:

foreach ($kuisioner as $art) { $no++; ?>
   <tr>
        <td><input type="hidden" name="id[]" value="<?php echo $art->id ?>"></td>
        <td align="center">
            <input type="checkbox" name="checbox_trimester_i[]">
        </td>         
        <td align="center">
            <input type="checkbox" name="checbox_trimester_ii[]">
        </td>         
        <td align="center">
            <input type="checkbox" name="checbox_trimester_i[]">
        </td>
        </tr>
     <?php }

Here is my Controller, but still not work, please help me to solve it. Thanks 

for ($i=0; $i < count($id); $i++) { 
    $cek=[];
    $check_0 = isset($_POST['checbox_trimester_i'][$i]) ? 1 : 0;
    $check_1 = isset($_POST['checbox_trimester_ii'][$i]) ? 1 : 0;
    $check_2 = isset($_POST['checbox_trimester_iii'][$i]) ? 1 : 0;
    $arrayName = array(
        'id_pk' => $id[$i], 
        'trimester_1' => $check_0,
        'trimester_2' => $check_1,
        'trimester_3' => $check_2,
    );

    echo "<pre>";
    print_r($arrayName);
    echo "</pre>";
}

[droopsnoot]

There’s a typo in your checkbox names

            <input type="checkbox" name="checbox_trimester_i[]">
            <input type="checkbox" name="checbox_trimester_ii[]">
            <input type="checkbox" name="checbox_trimester_i[]">

is not what you were perhaps intending it to be:

    $check_0 = isset($_POST['checbox_trimester_i'][$i]) ? 1 : 0;
    $check_1 = isset($_POST['checbox_trimester_ii'][$i]) ? 1 : 0;
    $check_2 = isset($_POST['checbox_trimester_iii'][$i]) ? 1 : 0;

That is, you don’t have one called …_iii

If that doesn’t help, can you expand on “still not work” - does it not find anything, not find the correct values, fail completely with a blank screen?