echo mysql_get_client_info()."<br/>";//获取mysql客户端信息
    echo mysql_get_host_info()."<br/>";//获取mysql主机信息
    echo mysql_get_server_info()."<br/>";//获取mysql服务器信息
    echo mysql_get_proto_info()."<br/>";//获取mysql协议信息
    mysql_set_charset("gz2313");//设置mysql编码
    $utp =mysql_client_encoding($mysql->lianjie("127.0.0.1", "root", ""));//返回默认字符集名称
    echo $utp;
    $arra=array("主机信息"=>array(mysql_get_client_info()),"服务器信息"=>array(mysql_get_server_info()));
    foreach ($arra as $k =>$value){
    var_dump($value) ."<br/>";
    }
    $str = "sdsss";
    echo strlen($str)."<br/>";//计算字符长度
    $str ="  sss asdqwe asd ";
    
    $str = trim($str);//去掉两边的空格
    echo strlen($str);
    $replace = "binglan";
    $search ="cc";
    $subject= "hehe";
    echo str_replace($search, $replace, $subject);//关键字屏蔽