PHP-消息：在CodeIgniter中为foreach提供了无效的参数

我在应用Codeigniter的过程中遇到了几个问题-创建了一个函数

function searchUnivtab() {
        $country = $this->input->post('countryKey');
        $state = $this->input->post('stateKey');
        $level = $this->input->post('level');
        $degType = $this->input->post('degType');       
        $country = str_replace('%20', ' ', $country);
        $state = str_replace('%20', ' ', $state);
        $degType = explode('~', $degType);
        $data = @$this->get->getSearchedUniversityTab($country, $state, $level, $degType[1]);
        $html = '';
        $i = 0;
        foreach($data as $d)
        {
            $html .= '<option value="'.$d['name'].'">'.$d['name'].'</option>';
        }
        echo $html; die;
    }

错误为：遇到PHP错误严重性：警告消息：为foreach()提供无效的参数,行号：270,位于foreach行

与上述代码有关的任何帮助吗？

解决方法:

在下面的行中删除@以查看是否产生任何错误
所以更换

$data = @$this->get->getSearchedUniversityTab($country, $state, $level, $degType[1]);

同

$data = $this->get->getSearchedUniversityTab($country, $state, $level, $degType[1]);