搜寻表（实时搜索）

Question

我在过滤数据库中的问题，我有这样的代码，但它不显示过滤数据库之后我点击提交按钮搜索。

<form method="POST" action="client.php"> 
<div id="Search" style="display:none"> 
    <h4>Search Client</h4> 
     <table> 
      <tr> 
       <td> 
        <input type="text" name="text" placeholder="Keyword" /> 
       </td> 
       <td> 
        &nbsp &nbsp 
       </td> 
       <td> 
        <select id="search_by" name="search_by"> 
        <option value="Reference">Reference</option> 
        <option value="Lastname">Lastname</option> 
        <option value="Firstname">Firstname</option> 
        <option value="Province">Province</option> 
        <option value="Request">Request</option> 
        <option value="Status">Status</option> 
        </select> 
       </td> 
       <td> 
        &nbsp &nbsp 
       </td> 
       <td> 
        <input type="submit" name="btn_search" value="Search"> 
       </td> 
      </tr> 
     </table> 
     <br> 
     <?php 
     $res=mysqli_query($con,"SELECT*FROM client_info"); 
     echo "<table style='font-size:12px;border-spacing:5px; background-color:white; width:100%;'>"; 
     echo "<tr>"; 
     echo "<th> Reference No </th>"; 
     echo "<th> Lastname </th>"; 
     echo "<th> Firstname </th>"; 
     echo "<th> Middlename </th>"; 
     echo "<th> Street </th>"; 
     echo "<th> Brgy </th>"; 
     echo "<th> Town </th>"; 
     echo "<th> Prov </th>"; 
     echo "<th> Mobile </th>"; 
     echo "<th> Email </th>"; 
     echo "<th> Event </th>"; 
     echo "<th> Venue </th>"; 
     echo "<th> No. of Attendants </th>"; 
     echo "<th> Request </th>"; 
     echo "<th> Payment Ammount </th>"; 
     echo "<th> Payment Status </th>"; 
     echo "</tr>"; 
     while ($row=mysqli_fetch_array($res)) { 
      echo "<tr>"; 
      echo "<td>". $row["ref_no"] . "</td>"; 
      echo "<td>". $row["last_name"] . "</td>"; 
      echo "<td>". $row["first_name"] . "</td>"; 
      echo "<td>". $row["middle_name"] . "</td>"; 
      echo "<td><center>". $row["street"] . "</center></td>"; 
      echo "<td><center>". $row["brgy"] . "</center></td>"; 
      echo "<td><center>". $row["town"] . "</center></td>"; 
      echo "<td><center>". $row["prov"] . "</center></td>"; 
      echo "<td><center>". $row["mobile"] . "</center></td>"; 
      echo "<td><center>". $row["email_add"] . "</center></td>"; 
      echo "<td><center>". $row["event"] . "</center></td>"; 
      echo "<td><center>". $row["venue"] . "</center></td>"; 
      echo "<td><center>". $row["number_attendants"] . "</center></td>"; 
      echo "<td><center>". $row["request_res"] . "</center></td>"; 
      echo "<td><center>". $row["payment_amount"] . "</center></td>"; 
      echo "<td><center>". $row["payment_res"] . "</center></td>"; 
      echo "</tr>"; 
     } 
     echo "</table>"; 
     ?> 
    </form> 
    <?php 
    if (isset($_POST['btn_search'])) { 
     if ($_POST['search_by'] == 'Reference') { 
      $res=mysqli_query($con,"SELECT*FROM client_info WHERE ref_no LIKE '%".$_POST['text']."%'"); 
      echo "<table style='font-size:12px;border-spacing:5px; background-color:white; width:100%;'>"; 
      echo "<tr>"; 
      echo "<th> Reference No </th>"; 
      echo "<th> Lastname </th>"; 
      echo "<th> Firstname </th>"; 
      echo "<th> Middlename </th>"; 
      echo "<th> Street </th>"; 
      echo "<th> Brgy </th>"; 
      echo "<th> Town </th>"; 
      echo "<th> Prov </th>"; 
      echo "<th> Mobile </th>"; 
      echo "<th> Email </th>"; 
      echo "<th> Event </th>"; 
      echo "<th> Venue </th>"; 
      echo "<th> No. of Attendants </th>"; 
      echo "<th> Request </th>"; 
      echo "<th> Payment Ammount </th>"; 
      echo "<th> Payment Status </th>"; 
      echo "</tr>"; 
     while ($row=mysqli_fetch_array($res)) { 
      echo "<tr>"; 
      echo "<td>". $row["ref_no"] . "</td>"; 
      echo "<td>". $row["last_name"] . "</td>"; 
      echo "<td>". $row["first_name"] . "</td>"; 
      echo "<td>". $row["middle_name"] . "</td>"; 
      echo "<td><center>". $row["street"] . "</center></td>"; 
      echo "<td><center>". $row["brgy"] . "</center></td>"; 
      echo "<td><center>". $row["town"] . "</center></td>"; 
      echo "<td><center>". $row["prov"] . "</center></td>"; 
      echo "<td><center>". $row["mobile"] . "</center></td>"; 
      echo "<td><center>". $row["email_add"] . "</center></td>"; 
      echo "<td><center>". $row["event"] . "</center></td>"; 
      echo "<td><center>". $row["venue"] . "</center></td>"; 
      echo "<td><center>". $row["number_attendants"] . "</center></td>"; 
      echo "<td><center>". $row["request_res"] . "</center></td>"; 
      echo "<td><center>". $row["payment_amount"] . "</center></td>"; 
      echo "<td><center>". $row["payment_res"] . "</center></td>"; 
      echo "</tr>"; 
     } 
     echo "</table>"; 
     } 
    } 
    ?> 
</div> 

Answer 1

我认为它确实显示筛选结果。它看起来好像不是因为您每次输出未过滤的结果，而是在提交搜索表单时输出过滤结果。您只需根据是否提交搜索表单来运行不同的查询。像这样的东西。

// search form 

if (isset($_POST['btn_search'])) { 
    if ($_POST['search_by'] == 'Reference') { 
     $res = mysqli_query($con, "SELECT * FROM client_info WHERE ref_no LIKE '%".$_POST['text']."%'"); 
    } 
} else { 
    $res = mysqli_query($con, "SELECT * FROM client_info"); 
} 

// display your query results 

此外，查询很容易受到SQL注入。这不在问题的关键点，但您应该考虑使用预准备语句，而不是将后置值连接到SQL中。