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php实现发帖

2026-02-27 15:20:28PHP

PHP 实现发帖功能

数据库准备

创建数据库表存储帖子信息，例如：

CREATE TABLE posts (
    id INT AUTO_INCREMENT PRIMARY KEY,
    title VARCHAR(255) NOT NULL,
    content TEXT NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

表单设计

创建发帖表单页面（post_form.php）：

<form action="submit_post.php" method="post">
    <input type="text" name="title" placeholder="标题" required>
    <textarea name="content" placeholder="内容" required></textarea>
    <button type="submit">发布</button>
</form>

处理提交

创建处理提交的PHP文件（submit_post.php）：

php实现发帖

<?php
// 连接数据库
$conn = new mysqli('localhost', 'username', 'password', 'database_name');

// 检查连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 获取表单数据
$title = $_POST['title'];
$content = $_POST['content'];

// 防止SQL注入
$title = $conn->real_escape_string($title);
$content = $conn->real_escape_string($content);

// 插入数据
$sql = "INSERT INTO posts (title, content) VALUES ('$title', '$content')";

if ($conn->query($sql) === TRUE) {
    echo "发帖成功";
} else {
    echo "错误: " . $sql . "<br>" . $conn->error;
}

$conn->close();
?>

显示帖子

创建显示帖子的页面（view_posts.php）：

<?php
$conn = new mysqli('localhost', 'username', 'password', 'database_name');

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

$sql = "SELECT * FROM posts ORDER BY created_at DESC";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "<h3>" . htmlspecialchars($row['title']) . "</h3>";
        echo "<p>" . nl2br(htmlspecialchars($row['content'])) . "</p>";
        echo "<small>" . $row['created_at'] . "</small><hr>";
    }
} else {
    echo "暂无帖子";
}

$conn->close();
?>

安全增强

php实现发帖

使用预处理语句防止SQL注入：

$stmt = $conn->prepare("INSERT INTO posts (title, content) VALUES (?, ?)");
$stmt->bind_param("ss", $title, $content);
$stmt->execute();

文件上传

如需支持图片上传：

<form enctype="multipart/form-data">
    <input type="file" name="image">
</form>

PHP处理上传：

$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["image"]["name"]);
move_uploaded_file($_FILES["image"]["tmp_name"], $target_file);