如何将多个复选框值从视图传递到控制器（使用代码点火器框架工作） [英] How to pass multipal checkbox values from view to controller (using code igniter frame work)
问题描述
我尝试使用网站提供的教程学习CodeIgniter框架。
但是当我尝试将View状态值从View传递给控制器时，显示错误信息后显示。
I have tried to learn CodeIgniter framework using tutorial provided by website.
but when I tried to pass checkbox status values from View to controller, it was displayed following error msg.
遇到PHP错误
严重性：警告
消息：为foreach提供的参数无效（）
文件名： controllers / Todos.php
行号：29
A PHP Error was encountered
Severity: Warning
Message: Invalid argument supplied for foreach()
Filename: controllers/Todos.php
Line Number: 29
当我追踪它是由于foreach循环初始化。然后我回复
echo $ completed_todos;
echo $ completed_todos [0];
echo $ completed_todos [1]; - 没有价值;
并查看它是否返回值。但它只返回单个值，也许不是一个数组（我有一个以上的完整待办事项。）
能帮我解决这个问题。这对我来说是一个很大的帮助。
When I trace that it is due to foreach loop initialization. Then I echo the
echo $completed_todos;
echo $completed_todos[0];
echo $completed_todos[1]; — No value;
and see whether it returns values. But it have only return single value and perhaps not as an array ( I have more than one completed todos.)
Can you please help me to solve that. That would be a great help to me.
查看：索引
<！DOCTYPE html>
< html lang =en>
< head>
< meta charset =utf-8>
< title>简单的CodeIgniter应用程序 - Todos< / title>
< link rel =stylesheet
href =// maxcdn.bootstrapcdn.com/bootstrap/3.2.0/ css / bootstrap.min.css>
< / head>
< body>
< div class =container>
<？php echo form_open（'todos / update_completed'）; ？>
< h1> Todos< / h1>
< div class = list-group>
<？php foreach（$ todos as $ todo）{？>
< div class =list-group-item clearfix >
<？php
echo form_checkbox（'completed'，$ todo-> id，$ todo-> completed）;
？>
<？php echo $ todo-> task; ？>
< / div>
<？php}？>
< button type =submitclass =btn btn-primary>更新< / button>
<？php echo form_close（）; ？>
< / div><！ - /.container - >
< / body>
< / html>
VIEW :index
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Simple CodeIgniter App - Todos</title>
<link rel="stylesheet"
href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<?php echo form_open('todos/update_completed'); ?>
<h1>Todos</h1>
<div class="list-group">
<?php foreach ($todos as $todo) { ?>
<div class="list-group-item clearfix">
<?php
echo form_checkbox('completed', $todo->id, $todo->completed);
?>
<?php echo $todo->task; ?>
</div>
<?php } ?>
<button type="submit" class="btn btn-primary">Update</button>
<?php echo form_close(); ?>
</div><!-- /.container -->
</body>
</html>
Todos控制器代码
<？ php if（！defined（'BASEPATH'））exit（'不允许直接脚本访问'）;
class Todos扩展CI_Controller {
公共功能__construct（）{
parent :: __ construct（）;
//加载todo模型使其可用
// to * all * of the控制器的动作
$ this-> load-> model（'Todo_model'）;
$ this-> load-> helper（'form'）;
}
公共功能指数（）
{
// 1加载数据：
$ all_todos = $ this-> Todo_model-> get_all_entries（）;
// 2.使数据可用于视图
$ data = array（）;
$ data ['todos'] = $ all_todos;
// 3.渲染视图：
$ this-> load- > view（'todos / index'，$ data）;
}
公共函数update_completed（）{
$ completed_todos = $ this-> input-> post（'completed'）;
echo $ completed_todos;
foreach（$ completed_todos as $ todo_id）{
echo'todo with id ='。 $ todo_id
。 '标记为已完成。< br>';
}
}
}
Todos controller code
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Todos extends CI_Controller {
public function __construct() {
parent::__construct();
// Load the todo model to make it available
// to *all* of the controller's actions
$this->load->model('Todo_model');
$this->load->helper('form');
}
public function index()
{
// 1. Load the data:
$all_todos = $this->Todo_model->get_all_entries();
// 2. Make the data available to the view
$data = array();
$data['todos'] = $all_todos;
// 3. Render the view:
$this->load->view('todos/index', $data);
}
public function update_completed() {
$completed_todos = $this->input->post('completed');
echo $completed_todos;
foreach ($completed_todos as $todo_id) {
echo 'The todo with id = ' . $todo_id
. ' is marked as completed.<br>';
}
}
}
非常感谢您的帮助。
谢谢。
鹤山
我尝试过：
当我追踪它是由于foreach循环初始化。然后我回复
echo $ completed_todos;
echo $ completed_todos [0];
echo $ completed_todos [1]; - 没有价值;
并查看它是否返回值。但它只返回单个值，也许不是一个数组（我有一个以上的完整待办事项。）
能帮我解决这个问题。这对我来说是一个很大的帮助。
Thank you very much for the assistance.
Thank you.
Heshan
What I have tried:
When I trace that it is due to foreach loop initialization. Then I echo the
echo $completed_todos;
echo $completed_todos[0];
echo $completed_todos[1]; — No value;
and see whether it returns values. But it have only return single value and perhaps not as an array ( I have more than one completed todos.)
Can you please help me to solve that. That would be a great help to me.
推荐答案
completed_todos;
echo
completed_todos;
echo
completed_todos [0];
echo
completed_todos[0];
echo
completed_todos [1]; - 没有价值;
并查看它是否返回值。但它只返回单个值，也许不是一个数组（我有一个以上的完整待办事项。）
能帮我解决这个问题。这对我来说是一个很大的帮助。
completed_todos[1]; — No value;
and see whether it returns values. But it have only return single value and perhaps not as an array ( I have more than one completed todos.)
Can you please help me to solve that. That would be a great help to me.
查看：索引
<！DOCTYPE html>
< html lang =en>
< head>
< meta charset =utf-8>
< title>简单的CodeIgniter应用程序 - Todos< / title>
< link rel =stylesheet
href =// maxcdn.bootstrapcdn.com/bootstrap/3.2.0/ css / bootstrap.min.css>
< / head>
< body>
< div class =container>
<？php echo form_open（'todos / update_completed'）; ？>
< h1> Todos< / h1>
< div class = list-group>
<？php foreach（
VIEW :index
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Simple CodeIgniter App - Todos</title>
<link rel="stylesheet"
href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<?php echo form_open('todos/update_completed'); ?>
<h1>Todos</h1>
<div class="list-group">
<?php foreach (
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