codeigniter控制器发现但仍然是404错误

Question

我有以下控制器 -

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class News extends CI_Controller {

public function __construct()   {
    parent::__construct();
    $this->load->database();     

    $catid = $this->input->post('cat');

    if(isset($catid)){
        $this->filter($catid);
    }
}

private function filter($catid){
    $sql = "select * from news_master where instr(concat(',', `Category`, ','), ', $catid ,') <> 0 ";
    echo $sql;
}

}

提交表单时调用它。如果我提交表单，控制器会调用filter函数并打印$sql。奇怪的是，在它下面我得到默认404错误消息。 这是截图。！

我无法理解可能的原因。

Answer 1

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class News extends CI_Controller {

public function __construct()   {
    parent::__construct();
    $this->load->database();     
}
public function index()
{
    $catid = $this->input->post('cat');

    if(isset($catid)){
        $this->filter($catid);
    }

}
private function filter($catid){
    $sql = "select * from news_master where instr(concat(',', `Category`, ','), ', $catid ,') <> 0 ";
    echo $sql;
}

}

注意到你从构造函数中调用它。它应该在索引函数中。

Answer 2

私人功能不会在codeigniter中充当页面

private function filter($catid){
    $sql = "select * from news_master where instr(concat(',', `Category`, ','), ', $catid ,') <> 0 ";
    echo $sql;
}

需要更新为PUBLIC

public function filter($catid){
    $sql = "select * from news_master where instr(concat(',', `Category`, ','), ', $catid ,') <> 0 ";
    echo $sql;
}