当然可以！以下是一些PHP编程练习，可以帮助你提高你的PHP技能，这些练习涵盖了从基础到高级的各个方面。
1. Hello World
<?php echo "Hello, World!"; ?>
2. 计算两数之和
<?php
function add($a, $b) {
return $a + $b;
}
$num1 = 5;
$num2 = 3;
echo "Sum: " . add($num1, $num2);
?> 3. 表单处理
创建一个HTML表单，并在提交时使用PHP处理数据：
HTML (index.html)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Form Submission</title>
</head>
<body>
<form action="process.php" method="post">
<label for="name">Name:</label>
<input type="text" id="name" name="name"><br><br>
<input type="submit" value="Submit">
</form>
</body>
</html> PHP (process.php)
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$name = $_POST['name'];
echo "Hello, " . htmlspecialchars($name) . "!";
} else {
echo "Invalid request method.";
}
?> 4. 用户登录系统
HTML (login.html)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>User Login</title>
</head>
<body>
<form action="login.php" method="post">
<label for="username">Username:</label>
<input type="text" id="username" name="username"><br><br>
<label for="password">Password:</label>
<input type="password" id="password" name="password"><br><br>
<input type="submit" value="Login">
</form>
</body>
</html> PHP (login.php)
<?php
session_start();
$users = [
'user1' => 'password1',
'user2' => 'password2'
];
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$username = $_POST['username'];
$password = $_POST['password'];
if (isset($users[$username]) && $users[$username] === $password) {
$_SESSION['username'] = $username;
echo "Login successful!";
} else {
echo "Invalid credentials!";
}
} else {
echo "Invalid request method.";
}
?> 5. 数据库连接与查询
假设你已经安装并配置好了MySQL数据库，并且有一个名为testdb的数据库和一个名为users的表。
数据库结构（SQL）
CREATE DATABASE testdb;
USE testdb;
CREATE TABLE users (
id INT PRIMARY KEY AUTO_INCREMENT,
username VARCHAR(50) NOT NULL,
password VARCHAR(50) NOT NULL
); PHP (connect.php)
<?php
$servername = "localhost";
$username = "root"; // 修改为你的数据库用户名
$password = ""; // 修改为你的数据库密码
$dbname = "testdb"; // 修改为你的数据库名
// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// 检查连接
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
?> PHP (query.php)
<?php
include 'connect.php';
$sql = "SELECT * FROM users";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// 输出每行数据
while($row = $result->fetch_assoc()) {
echo "id: " . $row["id"]. " Name: " . $row["username"]. " Password: " . $row["password"]. "<br>";
}
} else {
echo "0 results";
}
$conn->close();
?> 小伙伴们，上文介绍php编程练习_PHP的内容，你了解清楚吗？希望对你有所帮助，任何问题可以给我留言，让我们下期再见吧。
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