結果過濾器不能正常工作

我已經使用php創建了一個過濾器結果，但它不能正常工作，當我過濾結果時它沒有顯示任何產品。產品尺寸和產品顏色列在不同的表格中。當我過濾並點擊提交它不顯示任何產品沒有產品爲我提出，雖然任何人都可以幫助我，請在下面是我使用的代碼，請讓我知道。結果過濾器不能正常工作

<form method="POST" action="product.php?cat=<?php echo $cat; ?>"> 
    <div class="price-box"> 
     <h5>Price</h5> 
     <input type="hidden" name='price_range' class="range-slider" min="0" max="600" value="23" /> 
    </div> 
    <div id="filters"> 
    <div class="size-box"> 
    <h5>size</h5> 
    <ul> 
     <li> <input type="checkbox" id="active" name="size[]" value="S"> <span class="check-txt">S (10)</span></li> 
     <li> <input type="checkbox" id="In Stock" name="size[]" value="XL"> <span class="check-txt">XL (10)</span></li> 
     <li> <input type="checkbox" id="large" name="size[]" value="L"> <span class="check-txt">L (10)</span></li> 
    </ul> 
    </div> 
    </div> 

    <div class="color-box"> 
     <h5>color</h5> 
     <ul> 
      <li> <input type="checkbox" name="color[]" value="White"> <span class="check-txt">White (2)</span></li> 
      <li> <input type="checkbox" name="color[]" value="Black"> <span class="check-txt">Black (3)</span></li> 
      <li> <input type="checkbox" name="color[]" value="Orange"> <span class="check-txt">Orange (3)</span></li> 
      <li> <input type="checkbox" name="color[]" value="Blue"> <span class="check-txt">Blue (4)</span></li> 
      <li> <input type="checkbox" name="color[]" value="Green"> <span class="check-txt">Green (2)</span></li> 
      <li> <input type="checkbox" name="color[]" value="Yellow"> <span class="check-txt">Yellow (1)</span></li> 
     </ul> 
     </div> 
     <input type="submit" name="filter" value="Filter Results" /> 
    </form>

這裏是我的PHP代碼

<?php 
    $num_rec_per_page=9; 
    if (isset($_GET["page"])) { $page = $_GET["page"]; } else { $page=1; }; 
     $start_from = ($page-1) * $num_rec_per_page;      
     $query = "SELECT * FROM products WHERE product_category = '$cat'"; 
      if(isset($_POST['filter'])) { 
       $query = "SELECT p.* FROM products as p 
       JOIN prod_size as ps ON (p.prod_id=ps.prod_id) 
       JOIN prod_color as pc ON (p.prod_id=pc.prod_id) 
       WHERE "; 
       $range = $_POST['price_range']; 
       $rg = explode(',', $range); 
       $range1 = $rg[0]; 
       $range2 = $rg[1]; 
       if($range1!='' && $range2!='') {  
        $query .= " p.product_price BETWEEN (".$range1." AND ".$range2.") AND "; 
       } 

       if(isset($_POST['size']) && is_array($_POST['size'])) { 
        $size = implode(',',$_POST['size']); 
        $query .= " ps.size IN ('".$size."') AND ";   
       } 

       if(isset($_POST['color']) && is_array($_POST['color'])) { 
        $color = implode(',',$_POST['color']); 
        $query .= " pc.color IN ('".$color."') AND ";  
       } 
        $query .= " p.prod_id > 0 "; 
      } 

      $query .= " LIMIT ".$start_from.",".$num_rec_per_page; 
      $get_prod = mysqli_query($connection, $query); 

      $total = mysqli_num_rows($get_prod); 
      while($prod = mysqli_fetch_assoc($get_prod)) { 
     ?> 
     <li class='resultblock' data-tag='<?php echo $prod['status']; ?>'> 
      <span class="cbp-vm-image"> 
      <img src="admin/uplaods/<?php echo $prod['product_image']; ?>" alt=""> 
       <ul> 
        <li><a href=""><i class="fa fa-heart"></i></a></li> 
        <li><a href=""><i class="fa fa-refresh"></i></a></li> 
        <li><a href=""><i class="fa fa-search"></i></a></li> 
       </ul> 
      </span> 

      <p class="cbp-vm-title"><?php echo $prod['product_name']; ?></p> 
       <ul class="cbp-vm-price"> 
        <li>$<?php echo $prod['product_price']; ?></li> 
        <li class="pro-rating"><span><i class="fa fa-star"></i></span> <span><i class="fa fa-star"></i></span> <span><i class="fa fa-star"></i></span> <span><i class="fa fa-star"></i></span> <span><i class="fa fa-star"></i></span></li> 
       </ul> 
      <a class="cbp-vm-icon cbp-vm-add" href="details.php?pid=<?php echo $prod['prod_id'];?>">View Details</a> 
      </li> 
      <?php } ?> 
     </ul>

謝謝

來源

2015-12-19 Usman Khan

開始打開error_reporting和'echo $ query;' –

SELECT p。* FROM products as p JOIN prod_size as ps ON（p.prod_id = ps.prod_id）JOIN prod_color as pc ON（p.prod_id = pc.prod_id）WHERE p.product_price BETWEEN（0 AND 426）AND ps.size IN（'XL'）AND p.prod_id> 0 LIMIT 0,9 –

確定'$ connection'已定義？ –

我覺得你的問題就在這裏：

你必須有$貓= $ _GET [ '貓']使用下面的代碼之前：

$cat = $_GET['cat']; //add this before 
$query = "SELECT * FROM products WHERE product_category = '$cat'";

來源

2015-12-19 19:47:17 GiapLee

已在頭文件中添加爲$ cat = $ _GET ['cat']; –

結果過濾器不能正常工作

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