<?php

// 检查session中的user_id是否存在，并且请求方法是POST
if (isset($_SESSION['user_id']) && $_SERVER['REQUEST_METHOD'] == 'POST') {
    // 获取表单数据并清理
    $content = htmlspecialchars($_POST['content'], ENT_QUOTES, 'UTF-8');
    $user_id = $_SESSION['user_id'];

    // 准备SQL语句
    $stmt = $pdo->prepare("INSERT INTO love_wall (user_id, content) VALUES (?, ?)");

    // 执行SQL语句
    if ($stmt->execute([$user_id, $content])) {
        echo "发表成功！";
    } else {
        echo "发表失败！";
    }
}
?>