// 在 AJAX 请求中包含 CSRF token
var csrf_token = $('input[name="csrf_test_name"]').val();
$.ajax({
    url: 'your_controller/your_method',
    type: 'POST',
    data: {
        csrf_test_name: csrf_token,
        // 其他数据...
    },
    success: function(response) {
        console.log(response);
    }
});

// application/config/config.php
$config['csrf_protection'] = FALSE;

// 确保 URL 格式正确
$.ajax({
    url: '<?php echo site_url("controller/method"); ?>',
    // 其他配置...
});

$.ajax({
    url: 'your_url',
    type: 'POST',
    contentType: 'application/x-www-form-urlencoded; charset=UTF-8',
    // 其他配置...
});

// 使用 FormData 对象
var formData = new FormData();
formData.append('key', 'value');

$.ajax({
    url: 'your_url',
    type: 'POST',
    data: formData,
    processData: false,
    contentType: false,
    // 其他配置...
});

// 控制器方法示例
public function your_method() {
    // 获取 POST 数据
    $data = $this->input->post();
    
    // 处理数据...
    
    // 返回 JSON 响应
    $this->output
        ->set_content_type('application/json')
        ->set_output(json_encode(['status' => 'success', 'data' => $processed_data]));
}

$.ajax({
    // 配置...
    error: function(xhr, status, error) {
        console.log(xhr.responseText);
        console.log(status);
        console.log(error);
    }
});

// 检查是否收到请求
public function your_method() {
    file_put_contents('debug.log', print_r($this->input->post(), true));
    // 或者
    log_message('debug', print_r($this->input->post(), true));
}

$(document).ready(function() {
    $('#submit-btn').click(function() {
        var csrf_token = $('input[name="csrf_test_name"]').val();
        
        $.ajax({
            url: '<?php echo site_url("ajax_controller/process_data"); ?>',
            type: 'POST',
            dataType: 'json',
            data: {
                csrf_test_name: csrf_token,
                name: $('#name').val(),
                email: $('#email').val()
            },
            success: function(response) {
                if(response.status == 'success') {
                    $('#result').html(response.message);
                } else {
                    alert('Error: ' + response.message);
                }
            },
            error: function(xhr, status, error) {
                console.log(xhr.responseText);
                alert('AJAX request failed: ' + error);
            }
        });
    });
});

class Ajax_controller extends CI_Controller {
    public function process_data() {
        $this->load->helper('url');
        
        $name = $this->input->post('name');
        $email = $this->input->post('email');
        
        // 验证数据
        if(empty($name) || empty($email)) {
            $response = ['status' => 'error', 'message' => 'Name and email are required'];
        } else {
            // 处理数据...
            $response = ['status' => 'success', 'message' => 'Data processed successfully'];
        }
        
        $this->output
            ->set_content_type('application/json')
            ->set_output(json_encode($response));
    }
}