Question

你好，所以我把我的过滤系统设置为一个简单的位置和价格范围，现在一切都是这样的：所以我的问题是最小和最大价格范围过滤器没有工作位置过滤器正在工作，因为它应该是我面临的唯一问题是最小和最大价格没有错误或警告什么都没有发生任何事情。 / p>

上面的php代码：

$cat1 = '';

if(isset($_GET["catid"])){

    $p1 = '';
    $p2 = '';
    $catid = $_GET["catid"];
    $l1 = substr($catid,0,1);
    $l2 = substr($catid,1,1);
    $p1 = "CAT".$l1;
    if(!empty($l2)){
        $p2 = "CAT".$l1."-".$l2;
        $p3 = $p2;
    }
    $cat1 = @$lang[$p1];
    $cat2 = @$lang[$p2];   
}

$postid = '';
$userid = '';
$pricemin = '';
$pricemax = '';
$location = '';

if(isset($_POST["filter"])){

$pricemin = $_POST["min"];
$pricemax = $_POST["max"];
$location = $_POST["location"];
}

主页代码：

 <div class="fp">
        <div class="filter">
            <b style="padding-left: 10px;">Filters:</b>
            <form class="filterform" action="" method="post"><br>
                Location: <br>
                <input name="location" ><br>
                Price Range:<br>
                Min:<input type="text" name="min" size="5"> Max:<input type="text" name="max" size="5"><br><br>
                <input class="submit-button" type="submit" name="filter" value="Filter">
            </form>
        </div>
        <div class="posts">
            <div id="adcat"><?php
                if(!empty($cat2)){
                    ?>
                    <a href="cat.php?catid=<?php echo $l1; ?>" ><?php echo $cat1." » "; ?></a><span><?php echo $cat2; ?></span>
                    <?php
                } else {
                echo "<font color='grey'>".$cat1."</font>";
                }
                        ?>
            </div><br><br>
            <div id="detailformscat">
                    <?php
                    if(empty($p1) && empty($p2)){
                        $sql = "SELECT * FROM posts p JOIN images i ON p.id = i.postid ";
                        if(!empty($location)){
                            $sql .= "AND location='$location'";
                        }
                        if(!empty($min)){
                            $sql.= "AND price>='$min' ";
                        }
                        if(!empty($max)){
                            $sql.= "AND price<='$max' ";
                        }
                    } else if(!empty($p2)){
                        $sql = "SELECT * FROM posts p JOIN images i ON p.id = i.postid WHERE catid='$p2' ";
                        if(!empty($location)){
                            $sql .= "AND location='$location'";
                        }
                        if(!empty($min)){
                            $sql.= "AND price>='$min' ";
                        }
                        if(!empty($max)){
                            $sql.= "AND price<='$max' ";
                        }
                    } else {
                        $sql = "SELECT * FROM posts p JOIN images i ON p.id = i.postid WHERE p.catid LIKE '$p1%' ";
                        if(!empty($location)){
                            $sql .= "AND location='$location'";
                        }
                        if(!empty($min)){
                            $sql.= "AND price>='$min' ";
                        }
                        if(!empty($max)){
                            $sql.= "AND price<='$max' ";
                        }
                    }
                    $res = mysqli_query($connect,$sql);
                     while ($row = mysqli_fetch_assoc($res)) {
                         $postid = $row["postid"];
                         ?>
                        <div id="ads">
                            <div id="adfavcat">
                                    <?php if(!isset($_SESSION["userid"])) { ?>
                                    <a href="post.php?login=false" ><img src="image/+fav.png" width="40px" height="40px"></a>
                                    <?php } else { 

                                            $userid = $_SESSION["userid"];
                                            $sql2 = "SELECT * FROM fav WHERE userid='$userid' AND postid='$postid' ";
                                            $res2 = mysqli_query($connect,$sql2);
                                            $rowcount = mysqli_num_rows($res2);

                                            if ($rowcount > 0){ ?>
                                                <a href="cat.php?catid=<?php echo $catid; ?>&delete&id=<?php echo $postid?>" ><img src="image/xfav.png" width="40px" height="40px"></a>
                                            <?php
                                            } else { ?>
                                            <a href="cat.php?catid=<?php echo $catid; ?>&add&id=<?php echo $postid; ?>" ><img src="image/+fav.png" width="40px" height="40px"></a>
                                            <?php }
                                    } ?>

                            </div>
                            <div id="titlepic">
                            <a href="review.php?id=<?php echo $postid; ?>"><?php echo $row["title"]; ?></a><br>
                            <a href="review.php?id=<?php echo $postid; ?>"><img src="<?php if(!empty($row["path1"])) { echo $row["path1"]; } else echo "image/noimage.png"; ?>" height="100px" width="150px"></a>
                            </div>
                            <div id="datescat">
                                <b>Date Added:</b> <?php echo date('m/d/Y H:i', $row["dateadded"]); ?><br>
                                <b>Renew Date:</b> <?php if($row["renewdate"] > 0){ echo date('m/d/Y H:i', $row["renewdate"]); } ?><br>
                                <b>Location:</b> <?php echo $row["location"]; ?><br>
                                <b>Price:</b> <?php echo $row["price"]."&pound"; ?><br>

                            </div>
                        </div>
                        <hr width="100%">
                        <?php
                     }

                ?>
        </div>
          </div>
    </div>

Answer 1

我认为这是因为您在您编写的SQL查询中将价格视为字符串

$sql.= "AND price>='$min' ";

尝试使用cast / sanitize / filter输入变量$ min＆amp; $ max到整数并删除引号。

---顺便说一句，我个人也会改变一些事情：

使用atom代替括号
使用ORM并从html页面（视图）中删除查询
如果2不可能，请尝试将所有php逻辑移动到php文件而不是html部分
删除所有IF并尝试编写代码而不重复

您也在加入表格而不是过滤，尝试更改

$sql = "SELECT * FROM posts p JOIN images i ON p.id = i.postid ";

与

$sql = "SELECT * FROM posts p JOIN images i ON p.id = i.postid WHERE p.id > 0 ";

变化

$pricemin = '';
$pricemax = '';

与

$min = '';
$max = '';

过滤系统无效

1 个答案: