将多查询MySQL应用于PHP语言

<?php
// 创建数据库连接
$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);
}

// 执行多个查询语句
$sql1 = "SELECT * FROM table1";
$sql2 = "SELECT * FROM table2";

$result1 = $conn->query($sql1);
$result2 = $conn->query($sql2);

// 处理查询结果
if ($result1->num_rows > 0) {
    while($row = $result1->fetch_assoc()) {
        // 处理查询结果
    }
} else {
    echo "没有结果";
}

if ($result2->num_rows > 0) {
    while($row = $result2->fetch_assoc()) {
        // 处理查询结果
    }
} else {
    echo "没有结果";
}

// 关闭数据库连接
$conn->close();
?>