Codeigniter无法加载库类

Question

我有一个名为的库文件 myMenu.php

<?php
class myMenu{
    function show_menu()
    {
        $obj = & get_instance();
        $obj->load->helper('url');

        $menu = "<ul>";

        $menu .= "<li>";
        $menu .= anchor('books/index','List of books');
        $menu .= "</li>";

        $menu .= "<li>";
        $menu .= anchor('books/input','Books entry');
        $menu .= "</li>";

        $menu .= "</ul>";

        return $menu;
    }
}

现在我在控制器中加载了这个库 books.php

function index()
    {
        $this->load->library('myMenu');
        $menu = new myMenu;
        $data['menu'] = $menu->show_menu();
        $this->load->view('main_view',$data);
    }

但页面显示错误An error occurred : Unable to load the requested class: mymenu.为什么这个错误显示类名 mymenu(全部为小写),其中我myMenu在控制器中写道

Answer 1

两个问题:

1)您的命名约定是错误的.

在CodeIgniter中,库必须以大写字母开头.类名和文件名都必须以大写字母开头,并且必须匹配.请参阅以下文档. https://www.codeigniter.com/user_guide/general/creating_libraries.html

2)你不应该用myinsten实例化myMenu new.访问您加载的库时,这通常是常用的方法:

    $this->load->library('mymenu'); // when calling the loader, the case doesn't matter
    $data['menu'] = $this->mymenu->show_menu(); //'mymenu' is the lowercase of the class name