无法从 CodeIgniter 下的 foreach 循环中检索值答案

【问题标题】：Can't retrieve values from foreach loop under CodeIgniter无法从 CodeIgniter 下的 foreach 循环中检索值
【发布时间】：2013-01-03 01:07:47
【问题描述】：

我无法在 CodeIgniter 视图中从 $info（如下所述）检索值。

这是场景：我用代码解释了一切。

function info() {
{...} //I retrieve results from database after sending $uid to model.
    $dbresults = $this->my_model->get_info($uid); //Assume that this model returns some value.


    foreach($dbresults as $row) {
        $info = $row->address; //This is what I need to produce the results
        $results = $this->my_model->show_info($info);

    return $results; //This is my final result which can't be achieved without using $row->address. so first I have to call this in my controller.

    }

    // Now I want to pass it to a view

    $data['info'] = $results;
    $this->load->view('my_view', $data);

    //In my_view, $info contains many values inherited from $results which I need to call one by one by using foreach. But I can't use $info with foreach because it is an Invalid Parameter as it says in an error.

【问题讨论】：

标签： php codeigniter foreach codeigniter-2 variable-assignment

【解决方案1】：

在foreach 中使用$result 是不合理的。因为在每个循环中 $result 都会取一个新值。因此，最好将其用作array，然后将其传递给您的视图。此外，您不应该在foreach 中使用return。

function info() {
{...} //I retrieve results from database after sending $uid to model.
    $dbresults = $this->my_model->get_info($uid); //Assume that this model returns some value

$result = array();
    foreach($dbresults as $row) {
        $info = $row->address; //This is what I need to produce the results
        $result[] = $this->my_model->show_info($info);

    }

    // Now I want to pass it to a view

    $data['info'] = $result;
    $this->load->view('my_view', $data);
}

检查 $result 数组在 foreach 结束后对 var_export($result); 或 var_dump($result); 做了什么。并确保这是您想要发送到您的视图的内容。

现在，在您看来，您可以这样做：

<?php foreach ($info as $something):?>

//process

<?php endforeach;?>

【讨论】：

【解决方案2】：

请从

中删除return声明

foreach($dbresults as $row) {
    $info = $row->address; //This is what I need to produce the results
    $results[] = $this->my_model->show_info($info);
    //  return $results; remove this line from here;
}

$data['info'] = $results; // now in view access by $info in foreach
$this->load->view('my_view', $data);

现在 $info 可以在视图中访问了。

希望对您有所帮助！

【讨论】：