如何在这段代码中分页？

Question

<?php 
     include("config/connection.php"); 
     $qry="SELECT * FROM `students_info`"; 
     $qry_sel=mysqli_query($con,$qry); 
      echo "<table border='2'>"; 
      echo"<tr>"; 
      echo "<td>SL_NO</td>"; 
      echo "<td>NAME</td>"; 
      echo "<td>ROLL</td>"; 
      echo "<td>COLLEGE_ID</td>"; 
      echo "<td>CLASS</td>"; 
      echo "<td>STATUS</td>"; 

      echo "</tr>"; 
      while($row=mysqli_fetch_array($qry_sel)) 
      { 
       echo "<tr>"; 
       $slno=$row['sl_no']; 
       echo "<td>".$row['sl_no']."</td>"; 
       echo "<td>".$row['name']."</td>"; 
       echo "<td>".$row['roll']."</td>"; 
       echo "<td>".$row['clgid']."</td>"; 
       echo "<td>".$row['class']."</td>"; 
       echo "<td><a href='delete.php?id=$slno'>DELETE</a><a href='edit.php?id=$slno'>!!EDIT</a></td>"; 

       //echo"<td>"."<a href='delete.php?del=".$id."'>Delete</a>"."</td>"; 
       echo "</tr>"; 
      } 
      echo"</table>"; 



?> 

Answer 1

以下步骤将指导您如何在现有代码中实施和合并分页。

• 转到https://github.com/rajdeeppaul/Pagination，下载pagination.php文件并将其包含到你的项目目录，如：

  require_once('pagination.php'); 
  

• 创建Pagination类的实例，与相应的驱动程序，这样的：

  $pg = new Pagination('mysqli', 'HOSTNAME', 'USERNAME', 'PASSWORD', 'DATABASE_NAME'); 
  

  更改HOSTNAME，USERNAME，PASSWORD和DATABASE_NAME根据您的数据库凭证。

• 使用setPaginationParameters()方法，像这样设置分页参数，

  $pg->setPaginationParameters(10, 5); 
  

• 呼叫getResult()方法Pagination类显示基于URL查询?page=X，这种行，

  $resultSet = $pg->getResult('SELECT * FROM students_info', NULL, $_GET, 'page'); 
  
  foreach($resultSet as $row){ 
      echo "<tr>"; 
       $slno=$row['sl_no']; 
       echo "<td>".$row['sl_no']."</td>"; 
       echo "<td>".$row['name']."</td>"; 
       echo "<td>".$row['roll']."</td>"; 
       echo "<td>".$row['clgid']."</td>"; 
       echo "<td>".$row['class']."</td>"; 
       echo "<td><a href='delete.php?id=" . $slno . "'>DELETE</a><a href='edit.php?id=" . $slno . "'>!!EDIT</a></td>"; 
      echo "</tr>"; 
  } 
  

• 最后，使用getPaginationLinks()方法显示分页链接，像这样，

  $pgLinks = $pg->getPaginationLinks(); 
  if(is_array($pgLinks) && count($pgLinks) && $pgLinks['prev']){ 
      /* previous pages are available */ 
      echo '« '; 
  } 
  if(is_array($pgLinks) && count($pgLinks) && count($pgLinks['links'])){ 
      /* show pagination links */ 
      foreach($pgLinks['links'] as $link){ 
       echo '<a href="yourPage.php?page='.$link.'">'.$link.'</a> '; 
      } 
  } 
  if(is_array($pgLinks) && count($pgLinks) && $pgLinks['next']){ 
      /* next pages are available */ 
      echo '&raquo;'; 
  } 
  

  注意：不要忘了更改yourPage.php与您的网页。

这里的完整代码：

<?php 
    require_once('pagination.php'); 

    $pg = new Pagination('mysqli', 'HOSTNAME', 'USERNAME', 'PASSWORD', 'DATABASE_NAME'); 
    $pg->setPaginationParameters(10, 5); 

    $resultSet = $pg->getResult('SELECT * FROM students_info', NULL, $_GET, 'page'); 

    echo "<table border='2'>"; 
     echo"<tr>"; 
     echo "<td>SL_NO</td>"; 
     echo "<td>NAME</td>"; 
     echo "<td>ROLL</td>"; 
     echo "<td>COLLEGE_ID</td>"; 
     echo "<td>CLASS</td>"; 
     echo "<td>STATUS</td>"; 

     echo "</tr>"; 
     foreach($resultSet as $row){ 
      echo "<tr>"; 
       $slno=$row['sl_no']; 
       echo "<td>".$row['sl_no']."</td>"; 
       echo "<td>".$row['name']."</td>"; 
       echo "<td>".$row['roll']."</td>"; 
       echo "<td>".$row['clgid']."</td>"; 
       echo "<td>".$row['class']."</td>"; 
       echo "<td><a href='delete.php?id=" . $slno . "'>DELETE</a><a href='edit.php?id=" . $slno . "'>!!EDIT</a></td>"; 
      echo "</tr>"; 
     } 

     $pgLinks = $pg->getPaginationLinks(); 
     echo "<tr style='text-align:center;'><td colspan='6'>"; 
     if(is_array($pgLinks) && count($pgLinks) && $pgLinks['prev']){ 
      /* previous pages are available */ 
      echo '&laquo; '; 
     } 
     if(is_array($pgLinks) && count($pgLinks) && count($pgLinks['links'])){ 
      /* show pagination links */ 
      foreach($pgLinks['links'] as $link){ 
       echo '<a href="yourPage.php?page='.$link.'">'.$link.'</a> '; 
      } 
     } 
     if(is_array($pgLinks) && count($pgLinks) && $pgLinks['next']){ 
      /* next pages are available */ 
      echo '&raquo;'; 
     } 
     echo "</td></tr>"; 
    echo"</table>"; 
?> 

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脚注：通过使用文档去，如果你需要对这个脚本的使用任何进一步的澄清。