PHP MySQL查询CSV的特定字段

<?php
// 连接到MySQL数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";
$conn = new mysqli($servername, $username, $password, $dbname);

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

// 读取CSV文件
$csvFile = "data.csv";
$file = fopen($csvFile, "r");

// 逐行读取CSV文件
while (($data = fgetcsv($file, 1000, ",")) !== FALSE) {
    // 获取特定字段的值
    $field1 = $data[0]; // 第一个字段
    $field2 = $data[1]; // 第二个字段

    // 执行MySQL查询
    $sql = "SELECT * FROM table WHERE field1 = '$field1' AND field2 = '$field2'";
    $result = $conn->query($sql);

    // 处理查询结果
    if ($result->num_rows > 0) {
        while ($row = $result->fetch_assoc()) {
            // 输出查询结果
            echo "字段1: " . $row["field1"] . ", 字段2: " . $row["field2"] . "<br>";
        }
    } else {
        echo "没有匹配的结果";
    }
}

// 关闭文件和数据库连接
fclose($file);
$conn->close();
?>