Simple Tutorial
Assume that we are making a class status inquiry program and will use PHP7 environment to connect in the form of PDO MySQL.
Check your class by student number and name.
Recommended (free): PHP7
Let’s first introduce the file structure and database structure:
PHP:
config.php stores database configuration information
cx.php query program
index.html user interface
The structure is as shown in the figure
MySQL:
Table Name: data
Field: 1.Sid 2.name 3.class
The structure is as shown in the figure
Ready, let’s start, now!
First build the user interface (index.html), two simple edit boxes and a simple button:
nbsp;html> <meta> <title>分班查询系统</title>
Okay, next configure the database information (config.php)
<?php $server="localhost";//主机的IP地址$db_username="root";//数据库用户名$db_password="123456";//数据库密码$db_name = "data";
Then write our main program (cx.php)
<?phpheader ("Content-Type: text/html; charset=utf8");if(!isset($_POST["submit"])){ exit("未检测到表单提交");}//检测是否有submit操作include ("config.php");$Sid = $_POST['Sid'];//post获得学号表单值$name = $_POST['name'];//post获得姓名表单值echo "<table style='border: solid 1px black;'>";echo "<tr> <th>学号</th> <th>姓名</th> <th>班级</th> </tr>";class TableRows extends RecursiveIteratorIterator{ function __construct($it) { parent::__construct($it, self::LEAVES_ONLY); } function current() { return "<td>" . parent::current() . "</td>"; } function beginChildren() { echo "<tr>"; } function endChildren() { echo "</tr>" . "\n"; }}try { $conn = new PDO("mysql:host=$server;dbname=$db_name", $db_username, $db_password); $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $stmt = $conn->prepare("SELECT Sid, name, class FROM data where Sid=$Sid and name='$name'"); $stmt->execute(); // 设置结果集为关联数组 $result = $stmt->setFetchMode(PDO::FETCH_ASSOC); foreach (new TableRows(new RecursiveArrayIterator($stmt->fetchAll())) as $k => $v) { echo $v; }} catch (PDOException $e) { echo "Error: " . $e->getMessage();}$conn = null;echo "";
This program is finished
Let’s give it a try
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