配置好后，就不需要每个控制器都需要加一个是否检查登录的函数
1、在\application\admin\controller下创建Common.php
namespace app\admin\controller;
use think\Controller;
use think\Request;
use think\Db;
class Common extends Controller
{
//检查是否登录
public function _initialize()
{
if(!session('username')){
$this->error('请先登录！',url('/admin/login/index'));
}
}
}
注意：
在这里已经继承了控制器(class Common extends Controller)，其它控制继承的就不是控制器了，而且是Common
2、其它控制文件，比如：在\application\admin\controller下的文件 admin.php
namespace app\admin\controller;
//use think\Controller;
use think\Validate;
//use think\Request;
use think\Db;
class Admin extends Common{
完整的登录案例：
Login.php控制器代码
<?php
namespace app\admin\controller;
use think\Controller;
use think\Validate;
use think\Request;
use think\Db;
use think\Session;
class Login extends Controller
{
public function index()
{
return $this -> fetch();
}
public function login()
{
$username=input('username');
$password1=input('password');
if(!$username || !$password1){
$this->error('错误：用户名、密码不能为空');
}
$cms_password = cms_password;
if(request()->isPost()){
$this->check(input('code'));
$password=md5($password1.$cms_password);
if($username){//验证用户名
$rsu= Db::name('admin')->where('name',$username)->find();
$countu = count($rsu);
if(!$countu){
$s1=1;//=1失败
}else{
$s1=9;//=9成功
}
}
if($s1==1){
$this->error('用户不存在！');
}
if($username && $password1){//验证密码
$rsp= Db::name('admin')->where('name',$username)->where('password',$password)->find();
$countp = count($rsp);
if(!$countp){
$s2=1;
}else{
$s2=9;
$id=$rsp['id'];
$group_id=$rsp['group_id'];//权限分组ID
$img=$rsp['img'];//头像
}
}
if($s2==1){
$this->error('密码错误！');
}
if($s1==9 && $s2==9){
session('id', $id);
session('username', $username);
session('group_id', $group_id);
session('img', $img);
$this->success('登录成功！',url('/admin/index'));
}
return;
}
return $this -> fetch();
}
// 验证码检测
public function check($code='')
{
if (!captcha_check($code)) {
$this->error('验证码错误');
} else {
return true;
}
}
//退出登录
public function logout()
{
session(null);
$this->success('登出成功！',url('/admin/login/index'));
}
}
模板
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>后台管理登录页面</title>
<meta name="keywords" content="后台管理模版" />
<meta name="description" content="FnCMS后台管理模版" />
<meta name="Author" content="CMS" />
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="format-detection" content="telephone=no">
<link rel="Shortcut Icon" href="/favicon.ico" />
<link rel="stylesheet" href="__STATIC__/layui/css/layui.css">
<link rel="stylesheet" type="text/css" href="__ADMIN__/login/login.css" media="all">
</head>
<body>
<div class="larry-main layui-layout animated shake larry-delay2" id="larry_login">
<div class="title">管理系统</div>
<p class="info">后台登录中心</p>
<div class="user-info">
<div class="avatar"><img src="__ADMIN__/login/admin.png" alt=""></div>
<form action="{:url('login')}" method="post" class="layui-form" id="larry_form">
<div class="layui-form-item">
<label class="layui-form-label">用户名:</label>
<input type="text" name="username" required lay-verify="required" aautocomplete="off" class="layui-input larry-input" placeholder="请输入您的用户名">
</div>
<div class="layui-form-item" id="password">
<label class="layui-form-label">密码:</label>
<input type="password" name="password" required lay-verify="required|password" aautocomplete="off" class="layui-input larry-input" placeholder="请输入您的登录密码">
</div>
<div class="layui-form-item larry-verfiy-code" id="larry_code">
<input type="text" name="code" required lay-verify="required" aautocomplete="off" class="layui-input larry-input" placeholder="输入验证码">
<div class="code">
<div style="width: 270px; height: 55px;"><img src="{:captcha_src()}" onClick="this.src='{:captcha_src()}?'+Math.random();" alt="captcha" style="width: 178px; height: 36px; padding: 1px 0px 0px 2px;"/></div>
</div>
</div>
<div class="layui-form-item">
<button class="layui-btn larry-btn" lay-filter="submit" lay-submit>立即登录</button>
</div>
</form>
</div>
<div class="copy-right">© 2016-2017 xxxx 版权所有 <a href="http://www.xxxxx.com" target="_blank">xxxx.com</a></div>
</div>
<script type="text/javascript" src="__STATIC__/layui/layui.js"></script>
<script type="text/javascript">
layui.use(["jquery", "layer", "form"], function() {
var layer = layui.layer
,form = layui.form
,$= layui.$;
var n = ($(document).height()-$("#larry_login").height())/2.5;
$("#larry_login").css({
"margin-top": n
});
});
</script>
</body>
</html>