从数据库生成的复选框的未定义索引[重复]

Question

我的 CodeIgniter 视图中有表单，其中复选框是从数据库生成的。

当我提交表单而不选中任何复选框时，我收到错误：

消息：未定义索引：formChecks

我的控制者：

public function formularz2()
{

    $this->load->helper(array('form', 'url'));
    $this->load->library('form_validation');

    //Names of checkboxes generated from model (DB)
    $data['szkolenia'] = $this->Szkolenie_m->pobierz();

    //Validation
    $this->form_validation->set_rules('imie', 'Imię', 'required');
    $this->form_validation->set_rules('accept_terms_checkbox', 'Checkbox', 'required');
    $this->form_validation->set_message('required', 'Błąd: Powyższe pole jest wymagane');

    //SUBMMIT

    if (!empty($_POST))
    {

    $konsultant = $this->uri->segment(3);

    $dane = array(
        'email1' => $this->input->post('email'),
        'imie' => $this->input->post('imie'),
        'nazwisko' => $this->input->post('nazwisko'),
        'nazwa_firmy' => $this->input->post('firma'),
        'konsultant_id' => $konsultant,
    );

    //Adding checked boxes to another database
    $boxes = $_POST['formChecks'];
    $N = count($boxes);
    $ostatni_id = $this->Osoby_m->ostatni_id();

    for($i=0; $i < $N; $i++)
    {
            $this->Osoby_m->nowy_wpis_formularz($boxes[$i]);    
    }       

    $this->Osoby_m->nowa_osoba($dane);  

    }   

    if ($this->form_validation->run() == FALSE)
    {
        $this->load->view('formularz', $data);
    }
    else
    {
        $this->load->view('wyslano_formularz');
    }
}

我的观点：

                <?php echo form_open(); ?>
              <div class="form-group">
                <label for="email" class="col-sm-2 control-label">Email:</label>
                <div class="col-sm-10" style="color: #c92e39;">
                  <input type="email" class="form-control" id="email" name="email" placeholder="Email" value="<?php echo set_value('email'); ?>">
                  <p class="help-block"><?php echo form_error('email'); ?></p>
                </div>
              </div>

              <div class="form-group">
                <label for="imie" class="col-sm-2 control-label">Imię:</label>
                <div class="col-sm-10" style="color: #c92e39;">
                  <input type="text" class="form-control" id="imie" name="imie" placeholder="Imię" value="<?php echo set_value('imie'); ?>">
                  <p class="help-block"><?php echo form_error('imie'); ?></p>
                </div>
              </div>

              <div class="form-group">
                <label for="nazwisko" class="col-sm-2 control-label">Nazwisko:</label>
                <div class="col-sm-10" style="color: #c92e39;">
                  <input type="text" class="form-control" id="nazwisko" name="nazwisko" placeholder="Nazwisko" value="<?php echo set_value('nazwisko'); ?>">
                  <p class="help-block"><?php echo form_error('nazwisko'); ?></p>
                </div>
              </div>

              <div class="form-group">
                <label for="firma" class="col-sm-2 control-label">Firma:</label>
                <div class="col-sm-10" style="color: #c92e39;">
                  <input type="text" class="form-control" id="firma" name="firma" placeholder="Firma" value="<?php echo set_value('firma'); ?>">
                  <p class="help-block" style="color:red;"><?php echo form_error('firma'); ?></p>
                </div>
              </div>


            <div class="col-sm-12" style="margin-bottom: 30px; margin-top: 30px;"><h3>Wybierz interesujące Cię szkolenia</h3></div>
              <div class="form-group">
                <label class="col-sm-2 control-label">Szkolenia:</label>
                <div class="col-sm-10">

    ////////////////////////
    ///MY CHECKBOXES LOOP///
    ////////////////////////
                  <?php foreach ($szkolenia as $szkolenie): ?>
                  <div class="checkbox">
                        <label><input id="szkolenie<?php echo $szkolenie->id; ?>" type="checkbox" name="formChecks[]" value="<?php echo $szkolenie->id; ?>"> <?php echo $szkolenie->nazwa_szkolenia; ?></label>         
                        <br>
                    </div>
                    <?php endforeach; ?>

                </div>
              </div>


              <div class="form-group">
                <div class="col-sm-12" style="margin-top: 50px; ">
             <input type="checkbox" name="accept_terms_checkbox" value="1"/> Zgadzam się na otrzymywanie maili od firmy Gamma<br>
              <span style="color: #c92e39;"><p><?php echo form_error('accept_terms_checkbox') ?></p></span>
                </div>
              </div>


              <button type="submit" class="btn btn-lg btn-success" style="margin-top: 50px;">Odbierz Voucher</button>
            <?php echo form_close(); ?>

如何修复此错误，或从数据库 formCheck[] 验证复选框？

Answer 1

尝试替换这个，

$boxes = $_POST['formChecks'];

与

$boxes = $this->input->post('formChecks');

然后检查条件

if(count($boxes)){
   // checked(may be few checkboxes)
} else {
   // not checked
}

Answer 2

错误出现在这一行：

$boxes = $_POST['formChecks'];

这样检查：

$boxes = empty($_POST['formChecks']) ？数组（）：（数组）$_POST['formChecks'];