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我正在创建一个搜索肉类包装数据库的多形式搜索框。搜索仅在用户特定时才有效,我希望他们能够搜索数据库而无需选择特定选项。其中三个表单框是供用户搜索宽度、高度和深度所有数值的,但它们仅在用户准确了解尺寸的情况下才会返回结果。如果无法找到与用户输入的值完全匹配的值,我希望搜索能够返回最接近的值。

如:

如果用户在宽度框中输入“252”,则当前将返回“未找到搜索”但数据库中有“251”。因此,如果用户输入“252”,SQL 查询会自动查找最接近的尺寸,然后理论上显示“251”。

这是HTML和PHP:

<body>

    <form action="form3.php" method="post"> 
      <label for ="description">Description:</label>
      <input type="text" name="descrip" /><br />

      <label for ="trayheight">Trayheight:</label>
      <input type="text" name="height" /> <br /> 

      <label for ="traywidth">Traywidth:</label>
      <input type="text" name="width" /> <br />

      <label for ="traydepth">Traydepth:</label>
      <input type="text" name="depth" /> <br />

      <label for="trayrange">Trayrange: </label>
                <select name="trayrange">
                    <option value=""></option>

                    <option value="BBQ">BBQ</option>

                    <option value="Dessert">Dessert</option>

                    <option value="Display">Display</option>

                    <option value="Meat">Meat</option>   

                    <option value="Microwave">Microwave</option>

                    <option value="Party">Party</option>

                    <option value="Salad/Wet Pasta">Salad/Wet Pasta</option>

                    <option value="Snacks">Snacks</option>

                    <option value="Standard">Standard</option>

                </select>

        <label for ="traytype">Traytype: </label> 
            <select name="traytype">
                    <option value=""></option>

                <option value="Open">Open</option>

            <option value="Cavitised">Cavitised</option>

                    <option value="Lid">Lid</option>

                    <option value="Tray">Tray</option>

                    <option value="Coallition">Coallition</option>

                    <option value="Bowl">Bowl</option>

                    <option value="Hinge pack">Open</option>

                    <option value="Pot">Pot</option>

                    <option value="Base & Lid">Base and Lid</option>

                    <option value="Rectangular">Rectangular</option>

                    <option value="Specalist">Specialist</option>
            </select><br />

        <label for="trayshape">Trayshape: </label>
            <select name="trayshape">
                    <option value=""></option>

            <option value="Rectangular">Rectangular</option>

                <option value="Oval">Oval</option>

                <option value="Square">Square</option>

                    <option value="Insert">Insert</option>

                    <option value="Round">Round</option>

                    <option value="Open">Open</option>
            </select><br />

        <input type="submit" value="Submit" /> 
    </form> 

    </body>

和 PHP:

   <body>

 <?php
    $con = mysql_connect ("localhost", "root", "");
           mysql_select_db ("delyn_db", $con);

    if (!$con)
        { 
         die ("Could not connect: " . mysql_error());
        }

            $descrip = mysql_real_escape_string($_POST['descrip']); 
            $height  = mysql_real_escape_string($_POST['height']);
            $width   = mysql_real_escape_string($_POST['width']);
            $depth   = mysql_real_escape_string($_POST['depth']);

            $varRange = mysql_real_escape_string($_POST['trayrange']);
            $varType  = mysql_real_escape_string($_POST['traytype']);
            $varShape = mysql_real_escape_string($_POST['trayshape']);
            $varImage = mysql_real_escape_string($_POST['imagename']);

            $sql = "SELECT * FROM delyn WHERE 
                        description LIKE '%".$descrip."%' 
                    AND trayheight LIKE '%".$height."%' 
                    AND traywidth LIKE '%".$width."%' 
                    AND traydepth LIKE '%".$depth."%' 
                    AND trayrange LIKE '%".$varRange."%' 
                    AND traytype LIKE '%".$varType."%' 
                    AND trayshape LIKE '%".$varShape."%' ";


            $r_query = mysql_query($sql);

                    while ($row = mysql_fetch_array($r_query))
                { 
                echo '<br /> Tool Code:   '. $row['toolcode'];
                echo '<br /> Description: '. $row['description']; 
                echo '<br /> Tray range:  '. $row['trayrange']; 
                echo '<br /> Tray type:   '. $row['traytype'];
                echo '<br /> Tray size:   '. $row['traysize']; 
                echo '<br /> Tray shape:  '. $row['trayshape'];  
                    echo '<br /> <img src="   '. $row['imagename'] . '"
                                    width="200" length="100">' . '<br />' . '<br />';  
                    }

                if (mysql_num_rows($r_query) <= 0){
                    echo 'No results match your search, please try
                                                  again';
                                  }
        ?>
                </body>

如果有人可以提供帮助,那就太好了,在此先感谢:)

编辑:

   <body>
        $scope = 20;
                $width_min = $width - $scope;
                $width_max = $width + $scope;
                $depth_min = $depth - $scope;
                $depth_max = $depth + $scope;
                $height_min = $height - $scope;
                $height_max = $height + $scope;

            $sql = "SELECT * FROM delyn WHERE 
                        description LIKE '%".$descrip."%' 
                    AND traywidth LIKE '%".$width."%'   
                    AND traydepth LIKE '%".$depth."%' 
                    AND trayheight LIKE '%".$height."%'
                    AND trayrange LIKE '%".$varRange."%' 
                    AND traytype LIKE '%".$varType."%' 
                    AND trayshape LIKE '%".$varShape."%'";

                if ($row = 0) {
            $sql = "SELECT * FROM delyn WHERE 
                        description LIKE '%".$descrip."%' 
                    AND (traywidth BETWEEN ".$width_min." AND ".$width_max.")  
                    AND (traydepth BETWEEN ".$depth_min." AND ".$depth_max.")  
                    AND (trayheight BETWEEN ".$height_min." AND ".$height_max.")  
                    AND trayrange LIKE '%".$varRange."%' 
                    AND traytype LIKE '%".$varType."%' 
                    AND trayshape LIKE '%".$varShape."%'";
                }
    <body>
4

2 回答 2

1

您可以根据表格中的托盘宽度与用户输入的宽度之间的绝对计算对条目列表进行排序,而不是使用固定的“上”和“下”边距。像这样的东西:

select d.*, abs(d.traywidth - USER_SEARCH_INPUTTED_WIDTH) as WIDTH_ABS from delyn d order by WIDTH_ABS limit 20;

这将为您提供基于“USER_SEARCH_INPUTTED_WIDTH”的附近托盘宽度列表,例如 252 作为与用户所追求的相对“距离”以及数据库实际具有的条目。

注意:您允许搜索/搜索的所有列都需要签名,否则您最终会得到时髦的结果(由于 abs)。

于 2012-10-09T14:44:31.870 回答
0

您可以使用 SQL BETWEEN 运算符。

于 2012-10-09T14:24:37.513 回答