有人可以解釋我的代碼出了什麼問題嗎？

Question

這裏是我的代碼

<div class="table-responsive"> 
         <table class="table table-striped table-hover"> 
          <thead> 
           <tr> 
            <td>Id</td> 
            <td>Articles Category</td> 
            <td>Update</td> 
            <td>Delete</td> 
           </tr> 
          </thead> 
          <tbody> 
           <tr> 
            <?php 
             $con = new mysqli("localhost", "root", "", "whatever"); 

     $sql = "SELECT id_kategori, nama_kategori FROM kategori"; 
     $stmt = $con->prepare($sql); 
     $stmt->execute(); 
     $stmt->bind_result($id, $cat); 
     while($stmt->fetch()) 
     { 
      echo "<td>$id</td>"; 
      echo "<td>$cat</td>"; 
      echo "<td>Update</td>"; 
      echo "<td>Delete</td>"; 
     } 
     $stmt->close(); 
            ?> 
           </tr> 
          </tbody> 
         </table> 
        </div> 

結果顯示我這個

「準備（$ SQL）; $ stmt->的execute（）; $ stmt-> bind_result（$ ID，$貓）; while（$ stmt-> fetch（））{echo「」; echo「」; echo「」; echo「」;} $ stmt-> close（）;？>「

我改變它以此爲目的的面向對象

<div class="table-responsive"> 
         <table class="table table-striped table-hover"> 
          <thead> 
           <tr> 
            <td>Id</td> 
            <td>Articles Category</td> 
            <td>Update</td> 
            <td>Delete</td> 
           </tr> 
          </thead> 
          <tbody> 
           <tr> 
            <?php 
             include 'connection.php'; 
             $showall = new connection(); 
             $showall->category(); 
            ?> 
           </tr> 
          </tbody> 
         </table> 
        </div> 

我的結果就是這樣

category（）; ？>

有人可以解釋我的代碼出了什麼問題嗎？

Answer 1

首先您已經使用了非常糟糕的編碼標準。您只需在HTML中間寫入db連接？好吧，你可以寫你的HTML爲

echo '<div class="table-responsive"> 
         <table class="table table-striped table-hover"> 
          <thead> 
           <tr> 
            <td>Id</td> 
            <td>Articles Category</td> 
            <td>Update</td> 
            <td>Delete</td> 
           </tr> 
          </thead> 
          <tbody> 
           <tr>'; 
            <?php 
             $con = new mysqli("localhost", "root", "", "whatever"); 

     $sql = "SELECT id_kategori, nama_kategori FROM kategori"; 
     $stmt = $con->prepare($sql); 
     $stmt->execute(); 
     $stmt->bind_result($id, $cat); 
     while($stmt->fetch()) 
     { 
      echo "<td>$id</td>"; 
      echo "<td>$cat</td>"; 
      echo "<td>Update</td>"; 
      echo "<td>Delete</td>"; 
     } 
     $stmt->close(); 
            ?> 
           echo '</tr> 
          </tbody> 
         </table> 
        </div>';