php执行sql语句打印结果

　　　　　　  $dbname=DB_NAME;
            $host=DB_HOST;
            $port=DB_PORT;
            $user =DB_USER;
            $password=DB_PWD;

            $mysqli = new mysqli($host, $user, $password, $dbname,$port);
            $mysqli->set_charset("utf8");
            $sql=trim($_POST["sql_content"]);
            $result = $mysqli->query($sql);


            $data=array();
            $data["check_sql"]=$sql;
            $data["result_str"]="";
            $data["total_str"]="";

            if($mysqli->errno>0){
                $data["result_str"]="更新失败";
                $data["total_str"]="<div style='margin-top:20px;font-weight:bold;margin-bottom: 10px'>".$mysqli->error."</div>";
            }else{
                if(is_object($result)){
                    $data["result_str"].="<table width='100%' border='1px' cellpadding='5px' cellspacing='0px' >";
                    $show_title=true;
                    $colums=0;
                    while ($row = $result->fetch_array(MYSQLI_ASSOC)) {
                        $header_str="";
                        $content_str="";
                        foreach($row as $key=>$value){
                            if($show_title){
                                $colums++;
                                $header_str.="<td>$key</td>";
                            }
                            $content_str.="<td>$value</td>";
                        }

                        if(!empty($header_str)){
                            $data["result_str"].= "<tr style='font-weight: bold'>$header_str</tr>";
                        }
                        $data["result_str"].="<tr>$content_str<tr>";
                        $show_title=false;
                    }
                    $data["result_str"].="</table>";
                    $data["result_str"].="</div>";
                    $data["total_str"]="<div style='margin-top:20px;font-weight:bold;margin-bottom: 10px'>共计&nbsp;&nbsp;".$mysqli->affected_rows."行&nbsp;&nbsp;".$colums."列</div>";
                    $result->close();
                }else{
                    $data["result_str"]="更新成功";
                    $data["total_str"]="<div style='margin-top:20px;font-weight:bold;margin-bottom: 10px'>共计&nbsp;&nbsp;".$mysqli->affected_rows."行</div>";
                }
            }
            $mysqli->close();