php 查询获得(遍历)MySQLI所有表名称，并删除所有数据表、创建多张表

$conn = new mysqli("数据库地址", "数据库用户名","用户密码", "数据库名");
if ($conn->connect_error) {// 检测连接
	die("连接失败: " . $conn->connect_error);
	 }else{//连接成功时开始写入数据库表
	$result = $conn->query("SHOW TABLES");   //执行之前先删除数据表
	while($arr = $result->fetch_assoc()){
	foreach($arr as $key=>$vle){//遍历所有遍名称
		//echo $vle; 输出所有数据表名
		$slms_sql = 'DROP TABLE '.$vle;//删除查询到的数据库代码
		 $conn->query($slms_sql);//开始删除
		}
	}
          
 }
$conn->close();//关闭数据库连接

2、php创建多个数据表解决办法

$slms_sql_list = "CREATE TABLE slms_list (
id INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY, 
name VARCHAR(30) NOT NULL COMMENT '名称'
)";

$slms_sql_users = "CREATE TABLE slms_users (
uid INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY, 
uname VARCHAR(30) NOT NULL COMMENT '用户名'
)";

$slms_sql_ping = "CREATE TABLE slms_ping (
pid INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
id INT(11) NOT NULL COMMENT '文章id'
)";

$slms_sql_huifu = "CREATE TABLE slms_huifu (
hid INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
pid INT(11) NOT NULL COMMENT '评论ID'
)";

$slms_sql = array($slms_sql_list,$slms_sql_users,$slms_sql_ping,$slms_sql_huifu);
foreach($slms_sql as $key=>$val){//遍历数据库执行代码
	if($conn->query($val) != 1){//创建失败时执行
	 echo "创建数据表错误: " . $conn->error;
	}else{
	 echo $key."创建成功！";
	}
 }