使用mysql查询从php中获取数据库中的数据

using query more than 4 query for fetch the data base the four query are run properly but i use one more query for fetch the hotel_id and this hotel_id use in different query but when i run the query, the query run properly but didn't get output in while loop and what is my mistake in the code..... this query working properly but $query1 = "select hotel_id from menu_master where menu_id=".$id; but in $hid = $row['hotel_id']; can't store any value in $hid..

使用查询超过4个查询获取数据库四个查询运行正常但我使用另一个查询来获取hotel_id和这个hotel_id在不同的查询中使用但是当我运行查询时,查询运行正常但没有得到在while循环中输出,我在代码中的错误是什么.....这个查询工作正常,但是$ query1 =“从menu_master中选择hotel_id,其中menu_id =”。$ id;但在$ hid = $ row ['hotel_id'];不能在$ hid中存储任何值..

$query1 = "select hotel_id from menu_master where menu_id=".$id;
                    $res = mysql_query( $query1);
                    while($row=mysql_fetch_array($res))
                    {
                        $hid = $row['hotel_id'];
                    }

                    $query = "select set_rank from menu_master where menu_id = $row_id and hotel_id='".$_REQUEST['hotel_id']."'";
                    //echo $query."<br/>";
                    $result = mysql_query($query);

                    while($row=mysql_fetch_array($result))
                    {
                        $current_rank = $row['set_rank'];
                    }

                    $current_id = $row_id;
                    $new_rank =$_REQUEST['set_rank'];

                     $sql = "select * from menu_master where set_rank = '$new_rank ' and hotel_id='".$_REQUEST['hotel_id']."'" ;    
                     $rs = mysql_query($sql);

                    while($row = mysql_fetch_array($rs))
                         {  
                                $menu_id = $row['menu_id'];
                                $sql="update menu_master 
                                set set_rank=$current_rank where menu_id= $menu_id and hotel_id='".$_REQUEST['hotel_id']."'";

                                mysql_query($sql);

                         }

                                    $sql="update menu_master set 
                                    hotel_id           = '".mysql_real_escape_string($_REQUEST['hotel_id'])."',
                                    menu_name          = '".mysql_real_escape_string($_REQUEST['menu_name'])."',
                                    menu_name_ar       = '".mysql_real_escape_string($_REQUEST['menu_name_ar'])."',
                                    is_active          = '".$is_active."',
                                    set_rank=$new_rank where menu_id= '$current_id' and hotel_id='".$_REQUEST['hotel_id']."'";
                                    mysql_query($sql);
                }

2 个解决方案

#1

Try this code

试试这个代码

$query1 = "select hotel_id from menu_master where menu_id=".$id;
$row = mysql_fetch_array(mysql_query($query1));
$hid = $row['hotel_id'];

#2

$query1 = "select hotel_id from menu_master where menu_id=".$id;

$ query1 =“从menu_master中选择hotel_id,其中menu_id =”。$ id;

                $res = mysql_query( $query1);

                while($row1=mysql_fetch_array($res))
                {


                    $hid = $row1['hotel_id'];

                $query = "select set_rank from menu_master where menu_id = $row_id and hotel_id='".$hid."'";
                //echo $query."<br/>";
                $result = mysql_query($query);

                while($row=mysql_fetch_array($result))
                {
                    $current_rank = $row['set_rank'];
                }

                $current_id = $row_id;
                $new_rank =$_REQUEST['set_rank'];

                 $sql = "select * from menu_master where set_rank = '$new_rank ' and hotel_id='".$hid."'" ;    
                 $rs = mysql_query($sql);

                while($row = mysql_fetch_array($rs))
                     {  
                            $menu_id = $row['menu_id'];
                            $sql="update menu_master 
                            set set_rank=$current_rank where menu_id= $menu_id and hotel_id='".$hid."'";

                            mysql_query($sql);

                     }

                                $sql="update menu_master set 
                                hotel_id           = '".mysql_real_escape_string($_REQUEST['hotel_id'])."',
                                menu_name          = '".mysql_real_escape_string($_REQUEST['menu_name'])."',
                                menu_name_ar       = '".mysql_real_escape_string($_REQUEST['menu_name_ar'])."',
                                is_active          = '".$is_active."',
                                set_rank=$new_rank where menu_id= '$current_id' and hotel_id='".$hid."'";
                                mysql_query($sql);
            }

#1