MySQLi根据列数量值重复行

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

// 创建数据库连接
$conn = new mysqli($servername, $username, $password, $dbname);

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

// 定义要插入的列数量和值
$columnCount = 3;
$columnValues = array("value1", "value2", "value3");

// 构建插入语句
$sql = "INSERT INTO table_name (column1, column2, column3) VALUES ";

// 根据列数量和值重复构建插入语句的值部分
for ($i = 0; $i < $columnCount; $i++) {
    $sql .= "(";
    for ($j = 0; $j < $columnCount; $j++) {
        $sql .= "'" . $columnValues[$j] . "'";
        if ($j < $columnCount - 1) {
            $sql .= ",";
        }
    }
    $sql .= ")";
    if ($i < $columnCount - 1) {
        $sql .= ",";
    }
}

// 执行插入操作
if ($conn->query($sql) === TRUE) {
    echo "插入成功";
} else {
    echo "插入失败: " . $conn->error;
}

// 关闭数据库连接
$conn->close();
?>