微信小程序腾讯云php使用

$servername = "your_server_name";
$username = "your_username";
$password = "your_password";
$dbname = "your_db_name";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检测连接
if ($conn->connect_error) {
  die("连接失败: " . $conn->connect_error);
}
echo "连接成功";

$stmt = $conn->prepare("SELECT * FROM users WHERE username = ?");
$stmt->bind_param("s", $username);
$username = $_POST['username'];
$stmt->execute();

<?php
header("Content-Type: application/json; charset=UTF-8");

$servername = "your_server_name";
$username = "your_username";
$password = "your_password";
$dbname = "your_db_name";

$conn = new mysqli($servername, $username, $password, $dbname);

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

$sql = "SELECT id, name FROM items";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    $items = array();
    while($row = $result->fetch_assoc()) {
        $items[] = $row;
    }
    echo json_encode($items);
} else {
    echo json_encode(array("message" => "没有找到数据"));
}
$conn->close();
?>