PHP development small forum tutorial database construction

The code is as follows

<?php
header("Content-type:text/html;charset=utf-8");    //设置编码
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "mybbs";
// 创建连接
$conn = mysqli_connect($servername, $username, $password, $dbname);
mysqli_set_charset($conn,'utf8'); //设定字符集
// 检测连接
if (!$conn) {
    die("连接失败: " . mysqli_connect_error());
}
// 使用 sql 创建数据表
$sql = "CREATE TABLE forums (
 id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
 `forum_name` varchar(50) NOT NULL,
  `forum_description` varchar(200) NOT NULL,
  `subject` varchar(50) NOT NULL,
  `last_post_time` datetime NOT NULL
 );";
if (mysqli_query($conn, $sql)) {
    echo "数据表 forums 创建成功";
} else {
    echo "创建数据表错误: " . mysqli_error($conn);
}
mysqli_close($conn);
?>

Create our user table and store our users in the "member" table , without which forums and posts are not allowed,

The creation code is as follows

<?php
header("Content-type:text/html;charset=utf-8");    //设置编码
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "mybbs";
// 创建连接
$conn = mysqli_connect($servername, $username, $password, $dbname);
mysqli_set_charset($conn,'utf8'); //设定字符集
// 检测连接
if (!$conn) {
    die("连接失败: " . mysqli_connect_error());
}
// 使用 sql 创建数据表
$sql = "CREATE TABLE member (
 id INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
 `username` varchar(50) NOT NULL,
  `password` varchar(50) NOT NULL,
  `email` varchar(50) NOT NULL,
  `log_time` datetime NOT NULL
);";
if (mysqli_query($conn, $sql)) {
    echo "数据表 member 创建成功";
} else {
    echo "创建数据表错误: " . mysqli_error($conn);
}
mysqli_close($conn);
?>

'tiopic 'Stored fields

##author Author of the post
title The title of the post
content The content of the post

• ##last_post_time The time when the post was published

• reply_author The person who responded to the post

• reply The reply content of the post

• reply_time The time to reply to the post

• The code is as follows

<?php
header("Content-type:text/html;charset=utf-8");    //设置编码
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "mybbs";
// 创建连接
$conn = mysqli_connect($servername, $username, $password, $dbname);
mysqli_set_charset($conn,'utf8'); //设定字符集
// 检测连接
if (!$conn) {
    die("连接失败: " . mysqli_connect_error());
}
// 使用 sql 创建数据表
$sql = "CREATE TABLE tiopic (
 id INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
 `author` varchar(50) NOT NULL,
  `title` varchar(100) NOT NULL,
  `content` text NOT NULL,
  `last_post_time` datetime NOT NULL,
  `reply_author` varchar(50) DEFAULT NULL,
  `reply` text,
  `reply_time` datetime DEFAULT NULL
);";
if (mysqli_query($conn, $sql)) {
    echo "数据表 tiopic 创建成功";
} else {
    echo "创建数据表错误: " . mysqli_error($conn);
}
mysqli_close($conn);
?>

Tip: This tutorial only demonstrates the simple forum principle, so the content of the posted post and the content of the reply post are put together. A truly complete forum reply requires PHP recursion is used. This tutorial does not use recursion, so when replying to a post, the new content will overwrite the previous content. I hope that learners will create a more complete forum after completing this course

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