排序和分页相结合，PHP与SQL

我有一个简历数据库，你可以看到下面的字段，它们非常标准。检索是通过将信息发送到SQL数据库的简单表单完成的

我对我的简单系统很满意，直到我的收件箱里挤满了500多名申请者。我以前的系统只允许我一个接一个地查看申请者，这将花费很长时间

我试图实现的是一个简单的后端页面，类似于表视图的phpmyadmin。（不，我不想只使用phpmyadmin，因为我想把简历筛选任务交给其他员工）

基本上，其概念是像excel一样显示表格，通过单击标题、分页[每页20行]和删除行的复选框来进行排序

我可以请求一些帮助，因为我已经花了很多精力试图解决这个问题；）

到目前为止，我得到的是：

排序工作没有问题，单击其中一个标题会将localhost/mena/new3.php？sort=fname输出到地址栏，解析正确的Sql查询并对页面进行排序

到目前为止，分页不起作用。该页面显示所有815名候选人。它提供了编号为1-42的链接，单击该链接会导致地址栏更改为localhost/new3.php？page=2，但更改为0

而且，就我的一生而言，我看不出如何将php删除包含在这个

9 yo伪代码的思想是：

//Input the rows from SQL
While($row = mysqli_fetch_array($result))
  {
  echo "<tr>";
  echo "<td> $checkbox1
  if checkbox1=true then mysqli_query($con,"DELETE FROM cv WHERE .$row[].");
  echo "<td>" . $row['title'] . 

//从SQL输入行
While（$row=mysqli\u fetch\u数组（$result））
{
回声“；
echo“$checkbox1
如果checkbox1=true，则mysqli_查询（$con，“从cv中删除，$row[]）；
回显“.$row['title']。

到目前为止，我的代码是：

<?php
$con=mysqli_connect("localhost","root","","test_db-jil");
// Check connection
if (mysqli_connect_errno($con))
  {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  }

// Pagination  
if (isset($_GET["page"])) { $page  = $_GET["page"]; } else { $page=1; }; 
$start_from = ($page-1) * 20; 

// Sort, from headers.
if(isset($_REQUEST['sort'])){
    if($_GET['sort'] == "title"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY title");
    }
    elseif($_GET['sort'] == "fname"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY fname");
    }
    elseif($_GET['sort'] == "lname"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY lname");
    }
    elseif($_GET['sort'] == "gender"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY gender");
    }
    elseif($_GET['sort'] == "dob"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY dob");
    }
    elseif($_GET['sort'] == "nationality"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY nationality");
    }
    elseif($_GET['sort'] == "language"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY language");
    }
    elseif($_GET['sort'] == "phone"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY phone");
    }
    elseif($_GET['sort'] == "email"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY email");
    }
    elseif($_GET['sort'] == "uni"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY uni");
    }
    elseif($_GET['sort'] == "prog"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY prog");
    }
    elseif($_GET['sort'] == "graddate"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY graddate");
    }
    elseif($_GET['sort'] == "startdate"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY startdate");
    }
    elseif($_GET['sort'] == "grad"){
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY grad");
    }   
    else{
    $result = mysqli_query($con,"SELECT * FROM cv ORDER BY fname");
    }
}
else{ // Default if no parameters passed
    $result = mysqli_query($con,"SELECT * FROM cv");
    }


//Table of Content  
echo "<table border='1'>
<tr>
<th><a href=new3.php?sort=title>Title</a></th>

<th><a href=new3.php?sort=fname>First Name</a></th>

<th><a href=new3.php?sort=lname>Last Name</a></th>

<th><a href=new3.php?sort=gender>Gender</a></th>

<th><a href=new3.php?sort=dob>Date Of Birth</a></th>

<th><a href=new3.php?sort=nationality>Nationality</a></th>

<th><a href=new3.php?sort=language>Language</a></th>

<th><a href=new3.php?sort=phone>Phone No</a></th>

<th><a href=new3.php?sort=email>Email</a></th>

<th><a href=new3.php?sort=uni>University</a></th>

<th><a href=new3.php?sort=prog>Program</a></th>

<th><a href=new3.php?sort=graddate>Graduated</a></th>

<th><a href=new3.php?sort=startdate>Start Date</a></th>

<th><a href=new3.php?sort=grad>Applying for</a></th>

<th>CV File</th>

</tr>";

//Input the rows from SQL
While($row = mysqli_fetch_array($result))
  {
  echo "<tr>";
  echo "<td>" . $row['title'] . "</td>";
  echo "<td>" . $row['fname'] . "</td>";
  echo "<td>" . $row['lname'] . "</td>";
  echo "<td>" . $row['gender'] . "</td>";
  echo "<td>" . $row['dob'] . "</td>";
  echo "<td>" . $row['nationality'] . "</td>";
  echo "<td>" . $row['language'] . "</td>";
  echo "<td>" . $row['phone'] . "</td>";
  echo "<td>" . $row['email'] . "</td>";
  echo "<td>" . $row['uni'] . "</td>";
  echo "<td>" . $row['prog'] . "</td>";
  echo "<td>" . $row['graddate'] . "</td>";
  echo "<td>" . $row['startdate'] . "</td>";
  echo "<td>" . $row['grad'] . "</td>";
  echo "<td><a href=" . $row['cvfilename'] .">" . $row['cvfilename'] ."</a></td>";


  echo "</tr>";
  }
echo "</table>";

//Get total count of rows then ceil divide by 20 as pages
$sql = "SELECT COUNT(*) as 'num' FROM cv";
$total_pages = $con->query($sql) or die(mysqli_error($connection)); 
$row = $total_pages->fetch_assoc();
$total_pages  = ceil($row['num'] / 20);

for ($i=1; $i<=$total_pages; $i++) { 
            //Can I ?page= and ?sort= ??????
            echo "<a href='new3.php?page=".$i."'>".$i."</a> "; 
};

mysqli_close($con);
?>

---

您知道只需分配

$\u获取一个变量：
$type=$\u GET

然后在mysqli中使用它：
$result=mysqli_查询（$con，“按$type从简历订单中选择*）

要限制结果，请使用“限制”：
$result=mysqli_query（$con，“按$type LIMIT 20$page从简历订单中选择*）

20=返回的数量
$page=您希望结果从哪里开始
以减少zillion的混乱queries@your-然而现在我得到的常识是：（！）注意：未定义的索引：在第10行的C:\wamp\www\mena\index2.php中排序（“title”、“fname”、“lname”、“gender”、“dob”、“national”、“language”、“phone”、“email”、“uni”、“prog”、“graddate”startdate“，”grad“；//字段名$key=array_search（$\u GET['sort']，$orders）；//看看我们是否有这样一个名称$orderby=$orders[$key]；//如果没有，第一个名称将自动设置。smart enuf:）$query=“按$orderby从简历顺序选择*”//值是安全的$result=mysqli_查询（$con，$query）；

第10行：'$key=array_search（$\u GET['sort']，$orders）；//看看我们是否有这样的名字'