Question

你好我是ci的新手，我想使用ajax从codeigniter传递到视图到控制器。如果我添加dataType：＆＃39; json＆＃39;，那么我的ajax无法工作，我想从控制器回显数据

<script type="text/javascript">
$(document).ready(function() {
        $(".cart").click(function(){
         var subid=$(this).attr('data-index');
         alert(subid);
         $.ajax({
            url: '<?php echo site_url(); ?>/Home/add_to_cart',
            type: "POST",
            data: {
                subid: subid
            },
            dataType:'json',
            success: function(data) {
                window.location.href = '<?php echo base_url(); ?>index.php/Home/add_to_cart';
                 alert(data);
            },
            error: function(xhr, status, error) {
                 var error=xhr.responseText;
        //       alert(error);
              }

        });
    });
}); 
 </script>

控制器我想在ajax发送请求时回显类别ID

$category_id = $this->input->post('subid');
echo json_encode($category_id);

Answer 1

在控制器echo中，标题如下

php ：

header("Content-Type: application/json", true);
echo json_encode(array('id'=>$category_id));

Ajax ：更改您的成功功能代码顺序

success: function(data) {
               console.log(data);
               temp = JSON.parse(data);
               alert(temp.id);
               //window.location.href = '<?php echo base_url(); ?>index.php/Home/add_to_cart';

            },

Answer 2

这很简单，在你的Controller功能中，add_to_cart就是这样做的：

$category_id = $this->input->post('subid');
echo $category_id;

不要添加它的json_encode（）。然后，如果你想返回你的ajax请求就像这样做

success: function(data) {
          alert(data);
},

那应该是有效的。

只是评论它是否无效。

谢谢，

Answer 3

试试这个

$.ajax({
            type:'POST',
            url:'<?php echo base_url();?>.'/Home/add_to_cart',
            data:{'subid':subid},
            success:function(data){
                //location.reload();
            }
        });

Answer 4

以下是有关Freshers在CodeIgniter中需要处理的所有信息：）

首先删除＆＃39; index.php＆＃39;来自CodeIgniter网址的.htaccess。创建.htaccess文件，其中CodeIgniter＆＃39; index.php＆＃39;存在。

.htaccess （使用Windows，只需将任何空白文本文件重命名为 .htaccess。 创建一个.htaccess文件，这么简单...... ）

<IfModule mod_rewrite.c>
    RewriteEngine on
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule .* index.php/$0 [PT,L] 
</IfModule>

如何在WAMP中启用mode_rewrite

如何在WAMP中手动启用mode_rewrite

1 - 使用您喜欢的文本编辑器打开apache的配置文件。

2 - 配置文件通常位于： {apache_dir} /conf/httpd.conf

3 - 如果您使用的是XAMPP或WAMP包，那么您将找到该文件 at： {xampp_dir} /bin/apache/apache-xxx/conf/httpd.conf 或 {wamp_dir} /bin/apache/apache-xxx/conf/httpd.conf 的

4 - 搜索以下字符串： #LoadModule rewrite_module modules / mod_rewrite.so 并取消注释（删除“＃”符号）。

5 - 现在搜索另一个字符串 AllowOverride 无，并将其替换为 AllowOverride All

6 - 最后保存更改，关闭文本编辑器并重新启动Apache服务器。

设置＆＃39; base_url＆＃39;自动

/* |-------------------------------------------------------------------------- | Dynamic Base Url |-------------------------------------------------------------------------- | Put below code in 'index.php' on top | */ define('APP_URL', ($_SERVER['SERVER_PORT'] == 443 ? 'https' : 'http') . "://{$_SERVER['SERVER_NAME']}".str_replace(basename($_SERVER['SCRIPT_NAME']),"",$_SERVER['SCRIPT_NAME']));

配置设置

/* |-------------------------------------------------------------------------- | Base Site URL |-------------------------------------------------------------------------- | | URL to your CodeIgniter root. Typically this will be your base URL, | WITH a trailing slash: | | http://example.com/ | | If this is not set then CodeIgniter will guess the protocol, domain and | path to your installation. | */ $config['base_url'] = APP_URL; /* |-------------------------------------------------------------------------- | Index File |-------------------------------------------------------------------------- | | Typically this will be your index.php file, unless you've renamed it to | something else. If you are using mod_rewrite to remove the page set this | variable so that it is blank. | */ $config['index_page'] = '';

配置CSRF设置 （如果您没有在表单中传递CSRF令牌，或者没有使用CodeIgniter表单助手。否则您将无法POST参数或通过ajax或表单POST调用Controller方法 ）

$config['csrf_protection'] = FALSE;

现在，问题答案:(

<强> 的JavaScript

<script type="text/javascript"> $(document).ready(function() { // define base url var _CI_BASE_URL_ = "<?php echo site_url(); ?>"; /** * --------------------------- * Example -1 with Url Params * --------------------------- */ // on click cart button call ajax $(".cart").click(function(e){ // stop default button behaviour e.preventDefault(); // get subid from button attr var subid = $(this).data('index'); // ajax function $.ajax( { // *Notice: just send 'subid' with ajax url and CodeIgniter will take it from url url: _CI_BASE_URL_ + 'home/add_to_cart/' + subid, // method type: "POST", // data type dataType:'json', // success callback success: function(data) { // why server response, we already have subid in JavaScript vars // we can user that same to redirect in url window.location.href = _CI_BASE_URL_ + 'home/add_to_cart/' + subid; }, // ohh! we got error error: function(xhr, status, error) { // get ajax error var error = xhr.responseText; alert('Request made some error: ' + error); } }); }); /** * --------------------------- * Example -2 with POST Params * --------------------------- */ // on click cart button call ajax $(".cart").click(function(e){ // stop default button behaviour e.preventDefault(); // get subid from button attr var subid = $(this).data('index'); // ajax function $.ajax( { // just send subid with url and CodeIgniter will take from url url: _CI_BASE_URL_ + 'home/add_to_cart_another', // method type: "POST", // POST params data: {subid: subid}, // data type dataType:'json', // success callback success: function(data) { // if got the JSON with key cat_id if(data.cat_id){ // if you want to alert, first alert then redirect alert('CodeIginter retuned Cat ID: ' + data.cat_id); // redirect user now.. window.location.href = _CI_BASE_URL_ + 'home/add_to_cart_another/' + data.cat_id; }else{ alert('Category ID not return or null...'); } }, // ohh! we got error error: function(xhr, status, error) { // get ajax error var error = xhr.responseText; alert('Request made some error: ' + error); } }); }); }); </script>

现在CodeIgniter控制器:( :(

<?php // Security First Matters... (defined('BASEPATH') or exit('No direct script access allowed')); /** * Class Home CI Controller */ class Home extends CI_Controller { /** * Default run method * @return [type] [description] */ public function index() { $this->load->view('home'); } /** * [add_to_cart description] * @param [type] $cat_id [description] */ public function add_to_cart($cat_id) { /** * Codeigniter is enough smart to take parameters if passed in url * if url is 'http://localhost/CodeIgniter/home/add_to_cart/100' * '100' will be assign to $cat_id by CodeIgniter * * intval to make sure only integer */ // echo response for ajax call as JSON echo json_encode(array('cat_id' => intval($cat_id))); } /** * [add_to_cart description] * @param [type] $cat_id [description] */ public function add_to_cart_another() { /** * get cat id from post and sanitize by passing 2nd param as true for XSS Clean, * Security always matters... * * intval to make sure only integer */ $cat_id = $this->input->post('subid', true); // echo response for ajax call as JSON echo json_encode(array('cat_id' => intval($cat_id))); } } /* End of file home.php */ /* Location: ./application/controllers/home.php */

现在，我要睡觉了......：D Tada !! ....

使用ajax到控制器显示id

4 个答案: