php 登录与退出登录逻辑_php退出登录代码

 退出登录

<?php
/**
 * Created by PhpStorm.
 * User: liuan
 * Date: 2018-11-20 0020
 * Time: 11:20
 */
header('content-type:text/html;charset=utf-8');
include_once 'lib/fun.php';
session_start();
setcookie("username_auto_login",'',time()-1);
setcookie("password_auto_login",'',time()-1);
setcookie('auto_login', false, time() + 3600 * 24 * 30);
unset($_SESSION['user']);
 
msg(1, '退出登录成功！', 'index.php');

主要是会对cookie进行清除。

登录逻辑

function login($username, $password, $isMd5 = true)
{
 
    if (!$username) {
        return array(2, "用户名不能为空");
    }
    if (!$password) {
        return array(2, "密码不能为空");
    }
    $remember = isset($_POST['remember']) ? $_POST['remember'] : "";
    $auto_login = isset($_POST['auto_login']) ? $_POST['auto_login'] : "";
    // 数据库操作
    $con = mysqlinit();
    if (!$con) {
        return array(2, mysqli_error($con));
 
    }
    //根据用户名 查询用户
    $sql = "SELECT * FROM `la_user` WHERE `username`='{$username}' or `email`='{$username}'  LIMIT 1";
    $obj = mysqli_query($con, $sql);
    $reslut = mysqli_fetch_assoc($obj);
    if (is_array($reslut) && !empty($reslut)) {
        //array(4) { ["id"]=> string(1) "1" ["username"]=> string(3) "123" ["password"]=> string(32) "c6db6ad7cb84d87426f9c620de3b7b68" ["create_time"]=> string(10) "1542452928" }
        $password = $isMd5 ? createPassword($password) : $password;
        if ($password === $reslut['password']) {
            $_SESSION['user'] = $reslut;
            if ($remember == 'on') {
                setcookie("username_remember", $username, time() + 3600 * 24 * 30, null, null, null, true);
                setcookie("password_remember", $password, time() + 3600 * 24 * 30, null, null, null, true);
                setcookie('remember', true, time() + 3600 * 24 * 30, null, null, null, true);
            } else {
                setcookie("username_remember", "", time() - 1, null, null, null, true);
                setcookie("password_remember", "", time() - 1, null, null, null, true);
                setcookie('remember', false, time() + 3600 * 24 * 30, null, null, null, true);
            }
            if ($auto_login == 'on') {
                setcookie("username_auto_login", $username, time() + 3600 * 24 * 30, null, null, null, true);
                setcookie("password_auto_login", $password, time() + 3600 * 24 * 30, null, null, null, true);
                setcookie('auto_login', true, time() + 3600 * 24 * 30, null, null, null, true);
            } else {
                setcookie("username_auto_login", "", time() - 1, null, null, null, true);
                setcookie("password_auto_login", "", time() - 1, null, null, null, true);
                setcookie('auto_login', false, time() + 3600 * 24 * 30, null, null, null, true);
            }
            //每次登录成功以后 就刷新登录时间
            $sql = "update `la_user` set `login_time`='{$_SERVER['REQUEST_TIME']}' where `username`='{$username}'or `email`='{$username}' limit 1";
            if (!$obj = mysqli_query($con, $sql)) {
                return array(2, mysqli_error($con));
            } else {
                mysqli_close($con);
                return array(1, "登录成功");
            }
 
        } else {
            mysqli_close($con);
            return array(2, "密码不正确,请重新输入");
        }
    } else {
        mysqli_close($con);
        return array(2, "用户不存在,请重新输入");
    }
}

密码可以进行加密

/**
 * 密码加密
 * @param $password
 * @return bool|string
 */
function createPassword($password)
{
    if (!$password) {
        return false;
    }
    return md5(md5($password) . "wft");
}