php查询mysql

<?php
//    $checkin = $argv[1];
//    echo "请求的参数为:$checkin";

$servername = "127.0.0.1";
$username = "root";
$password = "123456";
$dbname = "AutoBuild";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}
    echo "连接成功";
//
$sql = "SELECT * FROM person";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 输出数据
    while($row = $result->fetch_assoc()) {
        echo "id: " . $row["id"]. " projectName: " . $row["name"]. "<br>";
    }
} else {
    echo "0 结果";
}
$conn->close();
?>