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PHP development small forum tutorial database construction

Create database

We create a database named 'mybbs'

The code is as follows

<?php
header("Content-type:text/html;charset=utf-8");    //設(shè)置編碼
$servername = "localhost";
$username = "root";
$password = "root";
// 創(chuàng)建連接
$conn = mysqli_connect($servername, $username, $password);
mysqli_set_charset($conn,'utf8'); //設(shè)定字符集
// 檢測連接
if (!$conn) {
    die("連接失敗: " . mysqli_connect_error());
}
// 創(chuàng)建數(shù)據(jù)庫
$sql = "CREATE DATABASE mybbs";
if (mysqli_query($conn, $sql)) {
    echo "數(shù)據(jù)庫創(chuàng)建成功";
} else {
    echo "數(shù)據(jù)庫創(chuàng)建失敗: " . mysqli_error($conn);
}
mysqli_close($conn);
?>

Then create our forum section table 'forums'

This table stores the fields of those forums we have published

varchar6200Field descriptionidIntroduction to the forum
    <thead id="rfkca"></thead>
    • <ruby id="rfkca"><rt id="rfkca"></rt></ruby>
     Nameidforum_name
    		forum_description ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?#Field typeINT
    varchar
    varchar
    datetime 
    		Field length

    50
    50
    Name of the forum
    Forum The topicForum creation time
    The code is as follows
    <?php
header("Content-type:text/html;charset=utf-8");    //設(shè)置編碼
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "mybbs";
// 創(chuàng)建連接
$conn = mysqli_connect($servername, $username, $password, $dbname);
mysqli_set_charset($conn,'utf8'); //設(shè)定字符集
// 檢測連接
if (!$conn) {
    die("連接失敗: " . mysqli_connect_error());
}
// 使用 sql 創(chuàng)建數(shù)據(jù)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, $sql)) {
    echo "數(shù)據(jù)表 forums 創(chuàng)建成功";
} else {
    echo "創(chuàng)建數(shù)據(jù)表錯誤: " . mysqli_error($conn);
}
mysqli_close($conn);
?>
     Create our user table and store our users in the "member" table , without which forums and posts are not allowed, 
    ##Field DescriptionUser IDUsername to be filled in for registrationPassword to be filled in for registrationE-mail address to be filled in for registrationRegistration time
    Field nameidusername
    		password email log_time 
    Field typeINT
    		varchar
    		varchar
    		varchar
    		datetime 
    Field length11505050
    The creation code is as follows
    <?php
header("Content-type:text/html;charset=utf-8");    //設(shè)置編碼
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "mybbs";
// 創(chuàng)建連接
$conn = mysqli_connect($servername, $username, $password, $dbname);
mysqli_set_charset($conn,'utf8'); //設(shè)定字符集
// 檢測連接
if (!$conn) {
    die("連接失敗: " . mysqli_connect_error());
}
// 使用 sql 創(chuàng)建數(shù)據(jù)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, $sql)) {
    echo "數(shù)據(jù)表 member 創(chuàng)建成功";
} else {
    echo "創(chuàng)建數(shù)據(jù)表錯誤: " . mysqli_error($conn);
}
mysqli_close($conn);
?>
    The following creates our post table 'tiopic'
    '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");    //設(shè)置編碼
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "mybbs";
// 創(chuàng)建連接
$conn = mysqli_connect($servername, $username, $password, $dbname);
mysqli_set_charset($conn,'utf8'); //設(shè)定字符集
// 檢測連接
if (!$conn) {
    die("連接失敗: " . mysqli_connect_error());
}
// 使用 sql 創(chuàng)建數(shù)據(jù)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, $sql)) {
    echo "數(shù)據(jù)表 tiopic 創(chuàng)建成功";
} else {
    echo "創(chuàng)建數(shù)據(jù)表錯誤: " . mysqli_error($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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    <?php
header("Content-type:text/html;charset=utf-8"); //設(shè)置編碼
$servername = "localhost";
$username = "root";
$password = "root";
// 創(chuàng)建連接
$conn = mysqli_connect($servername, $username, $password);
mysqli_set_charset($conn,'utf8'); //設(shè)定字符集
// 檢測連接
if (!$conn) {
 die("連接失敗: " . mysqli_connect_error());
}
// 創(chuàng)建數(shù)據(jù)庫
$sql = "CREATE DATABASE mybbs";
if (mysqli_query($conn, $sql)) {
 echo "數(shù)據(jù)庫創(chuàng)建成功";
} else {
 echo "數(shù)據(jù)庫創(chuàng)建失敗: " . mysqli_error($conn);
}
mysqli_close($conn);
?>
    

				
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