php清空mysql数据库

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

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

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

// 获取数据库中所有表的名称
$result = $conn->query("SHOW TABLES");

while ($row = $result->fetch_array()) {
    $table = $row[0];
    // 删除表中的所有数据
    $conn->query("DELETE FROM `$table`");
    // 或者使用TRUNCATE TABLE来清空表（速度更快，但不记录单行删除操作）
    // $conn->query("TRUNCATE TABLE `$table`");
}

echo "数据库已清空";

$conn->close();
?>

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

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    // 设置PDO错误模式为异常
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    // 获取数据库中所有表的名称
    $stmt = $conn->query("SHOW TABLES");
    while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
        $table = $row['Tables_in_' . $dbname];
        // 删除表中的所有数据
        $conn->exec("DELETE FROM `$table`");
        // 或者使用TRUNCATE TABLE来清空表
        // $conn->exec("TRUNCATE TABLE `$table`");
    }

    echo "数据库已清空";
} catch(PDOException $e) {
    echo "连接失败: " . $e->getMessage();
}

$conn = null;
?>