PHP连接redis

$redis = new redis();
$redis -> connect('127.0.0.1',6379); //指定端口
// $redis->auth(''); //Redis密码
$redis->select('4'); //指定数据库
//查询示例
$keys = $redis->keys('click:*');

PHP连接MySQL数据库
$servername = "localhost";
$username = "root";
$dbname = "test";
$password = "HAC8KJzB7wFKkLk3";
// 创建连接
$mysql = new mysqli($servername, $username, $password, $dbname);
// 检测连接
if ($mysql->connect_error) {

 die("mysql连接失败: " . $mysql->connect_error);

}
mysqli_query($mysql , "set names utf8");
mysqli_select_db( $mysql, 'test' );

//查询示例
$sql = "UPDATE urls SET clicks = '$click' WHERE keyword = '$keyword'";
$res = mysqli_query( $mysql, $sql );