Question

我想知道从最近几周开始我是php的初学者。如何从mysql数据库中检索特定的数据行并显示到html表中。首页将s_no作为URL parameter id传递到第二页。所以第二页需要选择它(i.e. id = $_GET['id'])，然后我在SQL查询中使用它来添加WHERE s_no = id。但它不起作用。下面是我的第二页编码。

 <?php

  $mysql_hostname = "localhost";
  $mysql_user = "root";
  $mysql_password ="";
  $mysql_database = "iaoform_db";

 // Create connection
 $conn = new mysqli($mysql_hostname, $mysql_user, $mysql_password, $mysql_database);
 // Check connection
 if ($conn->connect_error) {
     die("Connection failed: " . $conn->connect_error);
 } 
 $id = $_GET['id']; //read id from get inputs
 $sqli = "SELECT s_no, title_pro, type, cycle, type_pro, thesis, year, 
 proposer, institute, 
 email,present,contact,abstract,status_ongoing,status_file,

 sch_request,no_night,no_night_impossible,just_request,instru1,mode_ob,
 brief_descrip,plan,hfosc_b,hfosc_n,hfosc_g,hfosc_s,hesp_r,hesp_o,
 tirspec_b,tirspec_n,tirspec_s,tirspec_c,tirspec_slits,obj_name,obj_ra,
 obj_dec,obj_epoch,obj_mag,obj_size,scient_just,date 

    FROM forms WHERE s_no = ? "; //add a where clause with place holder
    $stmt = $conn->prepare($sqli); 
    $stmt->bind_param('i', $id); //bind input parameters

    $stmt->execute(); 
    $stmt->store_result();
    /* Get the number of rows */
   $num_of_rows = $stmt->num_rows;

   /* Bind the result to $row variable */
   $stmt->bind_result($row);

    if($num_of_rows < 1){  //exit or send the result if number of rows is less than one 
        echo "Can't find any record!"; 
        mysqli_close($conn);    
        exit();}
      ?>


 <!---------------------------------------------------->
 <?php
    while ($stmt->fetch()){
      ?>

 <table class="tg" id="myModal">
   <tr>
     <th class="tg-9hbo">S.No</th>
     <th class="tg-yw4l" colspan="5"><?php echo $row["s_no"]; ?>   </th>
   </tr>
   <tr>
     <td class="tg-9hbo">Title of the proposal:</td>
     <td class="tg-yw4l" colspan="5"><?php echo $row["title_pro"]; ?>   
 </td>
   </tr>
       |
       |
       |
       |
       |
  <tr>
      <td class="tg-9hbo">Scientific Justification:</td>
     <td class="tg-yw4l" colspan="5"><?php echo $row["scient_just"]; ?>   
 </td>
   </tr>
   <tr>
     <td class="tg-9hbo">Submission date:</td>
     <td class="tg-yw4l" colspan="5"><?php echo $row["date"]; ?>   </td>
   </tr>


 </table>
 <?php

       $stmt->free_result();

    }
    mysqli_close($conn);
 ?>

非常感谢你。：）

如何从数据库

0 个答案: