Implementation of ThinkPHP login function

This article describes how to implement the ThinkPHP login function. it is an essential feature for using ThinkPHP for member system development. For more information, see ThinkPHP.

Login is a common function in PHP programming. The ThinkPHP instance in this article mainly enters the home page after successful registration and tells you that it is a login user function. The specific implementation steps are as follows:

Step 1: Add the following to the config. php file:

'USER_AUTH_KEY'=>'authId'

Example:

<? Phpif (! Defined ('think _ path') exit (); return array (// defines the database connection information 'DB _ type' => 'mysql ', // The specified database is mysql 'DB _ host' => 'localhost', 'DB _ name' => 'myuser ', // database name 'DB _ user' => 'root', 'DB _ pwd' => '', // your database connection password 'DB _ port' => '123', 'DB _ prefix' => 'think _', // data table prefix 'user _ AUTH_KEY '=> 'authid');?>

Step 2: Use the insert () code in AdminAction. class. php:

Session::set(C('USER_AUTH_KEY'),$user);

Save the logon username to the session.

The complete implementation code is as follows:

Public function insert () {header ('content-Type: text/html; charset = utf-8 '); // prevents garbled characters $ user = $ _ POST ['user']; $ this-> verifyCheck (); $ Pagemodel = D ("user"); $ vo = $ Pagemodel-> create (); if (false ===$ vo) die ($ Pagemodel-> getError (); $ topicid = $ Pagemodel-> add (); // The add method returns the primary key value of the newly added record if ($ topicid) {// $ _ SESSION [C ('User _ AUTH_KEY ')] = $ USER; // The Session: set (C ('User _ AUTH_KEY') cannot be used '), $ user); // dump (Session: get ('authid'); echo "script" alert ('database added successfully'); location. href = 'http: // 127.0.0.1/zhuce/index. php/index'; script ";} else throw_exception (" script "alert ('database addition failed'); history. back (); script ");}

Step 3: Use if (! Session: is_set (C ('User _ AUTH_KEY ') determines if the USER has logged on.
Session: get (C ('User _ AUTH_KEY ') is the name of the login USER.

The code is as follows:

Public function index () {if (! Session: is_set (C ('User _ AUTH_KEY ') // if (! Isset ($ _ SESSION ['User _ AUTH_KEY ']) | ($ _ SESSION ['User _ AUTH_KEY'] = 0 )) // you cannot use this {$ msg = "the USER has not logged on";} else {$ msg = Session: get (C ('User _ AUTH_KEY ')). 'Welcome Back ';} $ this-> assign ('MSG', $ msg); $ this-> display ();}

Step 4: display the template on the homepage. the code is as follows:

{$ Msg}
This is my homepage

Summary:

The logon code is centered on writing sessions, judging sessions, and reading sessions.
Write session: Session: set (C ('User _ AUTH_KEY '), $ USER );
Used to determine the session: if (! Session: is_set (C ('User _ AUTH_KEY ')));
Read session: Session: get (C ('User _ AUTH_KEY '))

We hope that the implementation of the ThinkPHP login function described in this article can help you in ThinkPHP programming.