PHP development red and blue voting function tutorial database construction

We need to create two tables, one to store the results of our voting, and one to store the user's voting IP records.

---

We first create a database, the code is as follows

<?php
header("Content-type:text/html;charset=utf-8");    //设置编码
$servername = "localhost";
$username = "root";
$password = "root";
// 创建连接
$conn = mysqli_connect($servername, $username, $password);
mysqli_set_charset($conn,'utf8'); //设定字符集
// 检测连接
if (!$conn) {
    die("连接失败: " . mysqli_connect_error());
}
// 创建数据库
$sql = "CREATE DATABASE vote";
if (mysqli_query($conn, $sql)) {
    echo "数据库创建成功";
} else {
    echo "数据库创建失败: " . mysqli_error($conn);
}
mysqli_close($conn);
?>

We created a database named "vote"

---

Now create the first table 'votes' table to record the total number of votes from both red and blue parties

##Field typeintintintField length101010Field descriptionidNumber of red square votesNumber of blue square votes

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 = "vote";
// 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
$sql = "CREATE TABLE IF NOT EXISTS `votes` (
  `id` int(10) NOT NULL AUTO_INCREMENT,
  `likes` int(10) NOT NULL DEFAULT '0',
  `unlikes` int(10) NOT NULL DEFAULT '0',
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8;" ;
if (mysqli_query($conn, $sql)) {
    echo "数据表 votes 创建成功";
} else {
    echo "创建数据表错误: " . mysqli_error($conn);
}
mysqli_close($conn);
?>

---

Create a second table 'votes_ip' to save the user's voting IP record

Field name	id	likes	unlikes

Field name	id	vid	ip
Field type	int	int	varchar
Field length	10	10	40
Field description	id address	Record the id of the votes table	The ip address of the voting party

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 = "vote";
// 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
$sql = "CREATE TABLE IF NOT EXISTS `votes_ip` (
  `id` int(10) NOT NULL,
  `vid` int(10) NOT NULL,
  `ip` varchar(40) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8;";
if (mysqli_query($conn, $sql)) {
    echo "数据表 votes_ip 创建成功";
} else {
    echo "创建数据表错误: " . mysqli_error($conn);
}
mysqli_close($conn);
?>

Now that our database has been created, let’s start making the HTML page

Next Section