<?php
// 数据库连接
include 'db_config.php';

// 获取请求参数
$id = $_GET['id'];
$name = $_GET['name'];
$address = $_GET['address'];
$event_time = intval($_GET['event_time']);
$code = $_GET['code'];

// 检查是否已有相同记录
$sql_check = "SELECT * FROM nucleic_acid_test_2 WHERE id = '$id' AND address = '$address' AND event_time = $event_time";
$result_check = $link->query($sql_check);

if ($result_check->num_rows > 0) {
    // 如果已有记录，直接返回码值
    echo $code;
} else {
    // 插入新记录
    $sql_insert = "INSERT INTO nucleic_acid_test_2 (id, name, address, event_time, code) VALUES ('$id', '$name', '$address', $event_time, '$code')";
    if ($link->query($sql_insert) === TRUE) {
        echo $code;
    } else {
        echo "插入失败: " . $link->error;
    }
}