PHP imitation blog park, personal blog (1)_PHP tutorial-PHP Tutorial-php.cn

I have a bachelor's degree and have been self-taught PHP for more than half a year, intermittently, but finally firmed up my mind and continued PHP, so I wrote this PHP blog to find a stable PHP job, without asking for a high salary, but Seeking a place of refuge. I can understand most English documents. I am not stupid and I love learning. If you are interested, please contact me! Come if you are sincere! qq:240382473
I will release all key codes and documentation instructions in 3-5 times, and all styles in the blog backend will be applied to Blog Park!
Description:
1. It does not completely adopt the MVC architecture, but the concept is like this. Because it is not possible to write a very stable MVC architecture.
2. JQUERY AJAX is almost never used because I am not very familiar with it and can’t use it freely. You can use AJAX for guestbooks, no problem.
3. There are several public classes, and other codes are all handwritten. Please point out any shortcomings. Thank you very much.
4. Criticism and guidance are welcome, but please give your reasons.

Closer to home: Let’s look at the database architecture first

The engines of these tables are MYISAM, which is convenient for access. (The yellow key represents the primary key; the blue diamond represents a non-empty field; the white diamond represents a null field) The links in the picture only represent a potential relationship between them and cannot be associated during operation. Because the search engine is MyISAM . Therefore, joint queries and multi-table operations are required.
I will select the most important special fields in the post and category tables to explain in detail, and the others will be mentioned as important.
post:
post_id
category_id varchar(10) This is the category used to index blog posts. The category_id here is also a string type, so multiple categories can be set for each blog post.
type varchar(20) This field is used to distinguish between post, article, and diary; it can also be set to postDraft, articleDraft;
visiable Whether the blog post is visible
Other commonly used fields include title, content, creation time, last modification time, number of views, number of comments, tags, allowed comments, and some reserved fields.
category：
parent, count_child_number, count_parent_number for future expansion
type can set the categories of photo albums, blog posts, and diaries respectively
Other common fields such as name, description, creation time, visibility
comment:
address user IP
user_agent User browser type

Other fields are omitted...
Server Architecture
PHP5.4.2 + MYSQL 5.523 + APACHE 2.2.22 + Windows NT ARIST-PC 6.1 build 7600 (Windows 7 Home Basic Edition) i586 (local)
Blog architecture
Backend directory:

Backend directory description:
assert stores various resources js, css, image
class stores our classes, commonly used classes such as database operation classes, paging classes, and most of our models. . .
extention stores extensions such as mce’s rich editor
config stores our configuration information
templates stores all templates (smarty is not used)
upload stores photos and other files
There will be some similar controllers in the admin root directory, such as index.php, post.php, article.php, photo.php

Let’s take a look at admin/config/config.php

ini_set( "display_errors", true );
date_default_timezone_set( "Asia/Shanghai" );
// root and direcotry separate
define('DS', DIRECTORY_SEPARATOR);
define('ROOT', dirname(dirname(__FILE__)));

// database information
// need hash
define( "DB_USERNAME", "****" );
define( "DB_PASSWORD", '*****' );
define( "DB_NAME", "blog" );

// important directory
define( "CLASS_PATH", "classes" );
define( "TEMPLATE_PATH", "templates" );

// user imformation
define( "ADMIN_USERNAME", "admin" );
define( "ADMIN_PASSWORD", '$2a$08$wim8kpwHhAKa6MBSsGUMGOYfjkU1xvRKd4Fxwal.wj8dqFboCVSFawim8kpwHhAKa6MBSsGUMGO');
// hash and verified the password
function hasher($info, $encdata = false){
$strength = "08";
//if encrypted data is passed, check it against input ($info)
if ($encdata) {
    if (substr($encdata, 0, 60) == crypt($info, "$2a$".$strength."$".substr($encdata, 60))) {
      return true;
    }else {
      return false;
    }
} else {
//make a salt and hash it with input, and add salt to end
$salt = "";
for ($i = 0; $i < 22; $i++) {
    $salt .= substr("./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", mt_rand(0, 63), 1);
}
//return 82 char string (60 char hash & 22 char salt)
    return crypt($info, "$2a$".$strength."$".$salt).$salt;
    }
}

function __autoload($className) {
    if (file_exists(ROOT . DS . 'classes' . DS . strtolower($className) . '.class.php')) {
        require_once(ROOT . DS . 'classes' . DS . strtolower($className) . '.class.php');
    } else {
        /* Error Generation Code Here */
    }
}

这里我们定义了一些基本常量，和几个函数。
__autoload() 函数加载 admin/class/ 中的所有类
用 hasher() 函数加密了一个 88位的不可逆密码，登录过程就是用config.php 中的常量和 hasher( ) 函数来进行验证。
来看我们的 admin/index.php 后台控制器这个控制器主页显示一些博客的相关数据

require_once( "config/config.php" );
session_start( );
$action = isset( $_GET['action'] ) ? $_GET['action'] : "";
$username = isset( $_SESSION['username'] ) ? $_SESSION['username'] : "";

if ( $action != "login" && $action != "logout" && !$username ) {
login();
exit;
}

switch( $action ){
    case "login" :
        login( ) ;
    break;

    case "logout";
        logout( );
    break;

    default :
        admin( );
    break;
}

function admin( ){
$results['pageTitle'] = "Administrator Page";
require( TEMPLATE_PATH . "/admin.php" );
}

function logout( ){
    $results['pageTitle'] = "Login Page";
    unset( $_SESSION['username'] );
    header( "Location: index.php ");
}

这个设计模式是从一个老外那里学的!
原理就是：
首先我们加载我们的config.php，初始化session变量，获得 $action 这个重要变量的值；
然后我们判断 $action 和 $username 的值，如果用户没有登录以及用户名为空，返回登录页面;
如果用户正确输入了用户名和密码，则注册一个session 变量 $username,然后跳转到主页面 index.php, 这时我们会调用默认的 $action admin( ), 这个函数会加载一个模版admin.php；里面有个数组变量 $results['pageTitle']，以及我们的后台博客样式框架。
如果用户输入错了，则给出提示信息。

这个设计理念的核心就是， give ｛action｝ then ｛do something｝
我们会在后面的代码中反复看到。

这个就是博客后台的框架样式，从博客园copy 来的，采用表格布局的，兼容的，可自定义其他样式的，简单的，实用的，可扩展的，完美后台框架。