0

这是我的分页代码,在页面底部,显示页码,但 ahref 链接不起作用。谁能告诉我哪里出错了。我希望你不需要css文件。

另请注意,分页链接(ahref 链接)是第一次创建的,但是当我从一个页面移动到另一个页面时,链接会消失。(我没有包含连接字符串。)

   <html>
<head> 

<link href="pagin.css" rel="stylesheet" type="text/css" />
</head>

    <?php
/*
    Place code to connect to your DB here.
*/
include('config.php');  // include your code to connect to DB.


$tbl_name="data";       //your table name
// How many adjacent pages should be shown on each side?
$adjacents = 3;

/* 
   First get total number of rows in data table. 
   If you have a WHERE clause in your query, make sure you mirror it here.
*/
$query = "SELECT COUNT(*) as num FROM $tbl_name";
echo $query;
$total_pages = mysql_fetch_array(mysql_query($query));
$total_pages = $total_pages['num'];

/* Setup vars for query. */
$targetpage = "page3.php";  //your file name  (the name of this file)
$limit = 4;                                    
  //how many    items to show per page
$page = isset($_GET['page']);
if($page) 
    $start = ($page - 1) * $limit;          
 //first item to display on this page
else
    $start = 0;                             
    //if no page var is given, set start to 0

/* Get data. */
$sql = "SELECT * FROM $tbl_name LIMIT $start, $limit";

$result = mysql_query($sql) or die($sql. "<br>". mysql_error());

/* Setup page vars for display. */
if ($page == 0) $page = 1;                  //if no page var is given, default to 1.
$prev = $page - 1;                          //previous page is page - 1
$next = $page + 1;                          //next page is page + 1
$lastpage = ceil($total_pages/$limit);      //lastpage is = total pages / items per page, rounded up.
$lpm1 = $lastpage - 1;                      //last page minus 1

/* 
    Now we apply our rules and draw the pagination object. 
    We're actually saving the code to a variable in case we want to draw it more than once.
*/
$pagination = "";
if($lastpage > 1)
{   
    $pagination .= "<div class=\"pagination\">";
    //previous button
    if ($page > 1) 
        $pagination.= "<a href=\"$targetpage?page=$prev\">previous</a>";
    else
        $pagination.= "<span class=\"disabled\">previous</span>";   

    //pages 
    if ($lastpage < 7 + ($adjacents * 2))   //not enough pages to bother breaking it up
    {   
        for ($counter = 1; $counter <= $lastpage; $counter++)
        {
            if ($counter == $page)
                $pagination.= "<span class=\"current\">$counter</span>";
            else
                $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
        }
    }
    elseif($lastpage > 5 + ($adjacents * 2))    //enough pages to hide some
    {
        //close to beginning; only hide later pages
        if($page < 1 + ($adjacents * 2))        
        {
            for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
            {
                if ($counter == $page)
                    $pagination.= "<span class=\"current\">$counter</span>";
                else
                    $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
            }
            $pagination.= "...";
            $pagination.= "<a href=\"$targetpage?page=$lpm1\">$lpm1</a>";
            $pagination.= "<a href=\"$targetpage?page=$lastpage\">$lastpage</a>";       
        }
        //in middle; hide some front and some back
        elseif($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2))
        {
            $pagination.= "<a href=\"$targetpage?page=1\">1</a>";
            $pagination.= "<a href=\"$targetpage?page=2\">2</a>";
            $pagination.= "...";
            for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++)
            {
                if ($counter == $page)
                    $pagination.= "<span class=\"current\">$counter</span>";
                else
                    $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
            }
            $pagination.= "...";
            $pagination.= "<a href=\"$targetpage?page=$lpm1\">$lpm1</a>";
            $pagination.= "<a href=\"$targetpage?page=$lastpage\">$lastpage</a>";       
        }
        //close to end; only hide early pages
        else
        {
            $pagination.= "<a href=\"$targetpage?page=1\">1</a>";
            $pagination.= "<a href=\"$targetpage?page=2\">2</a>";
            $pagination.= "...";
            for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++)
            {
                if ($counter == $page)
                    $pagination.= "<span class=\"current\">$counter</span>";
                else
                    $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
            }
        }
    }

    //next button
    if ($page < $counter - 1) 
        $pagination.= "<a href=\"$targetpage?page=$next\">next</a>";
    else
        $pagination.= "<span class=\"disabled\">next</span>";
    $pagination.= "</div>\n";       
}
?>

<?php
    while($row = mysql_fetch_assoc($result))
    {

    // Your while loop here

    $title = $row['title'];
        $link = $row['link'];
        $region = $row['region'];
        $sector = $row['sector'];
        $theme = $row['theme']; 
        echo "<tr>";
        echo "<td>";
        echo "<div class='admonition'>";    
        echo "<div class='admonition-title'>";
        echo "<a href=$link><h3>$title<h3></a>";echo "</div>"; echo "</div>";
        echo "<h4>Sector: $sector&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Theme: $theme &nbsp; 
        &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br> Region: $region <hr> </td>";
        echo "</tr>";

    }
?>

<?php echo $pagination; ?>

4

2 回答 2

0

这可能是一个问题:

$pagination.= "<a href=\"$targetpage?page=$prev\">previous</a>";

一种解决方案

$pagination.= '<a href="' . $targetpage?page=$prev . '">previous</a>';
于 2013-10-26T03:08:58.307 回答
0

照此办理:

echo "<h4>Sector: $sector&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Theme: $theme &nbsp; 
        &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br> Region: $region <hr> </td>";
        echo "</tr>";

您的标签似乎没有结束标签。

改用这个

echo "<h4>Sector: $sector&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Theme: $theme &nbsp; 
    &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br> Region: $region </h4><hr> </td>";
    echo "</tr>";

它会破坏您的代码。此行后回显的分页无法显示分页链接。它可能在多余的不间断空格中丢失了 nbsp; 为什么不使用 css float 来减少该行的标记?

[更新 3.0]

这样做,让我知道你发现了什么(注意整数转换)。出于某种原因,这仅在我将 $page 转换为整数时才有效。

我已经包含了额外的代码来适应您指定的 3 个查询字符串 (k, x, y) 如果您更改它们,您也需要在代码中更改它们。另请参阅链接中的其他代码。

<?php
    $total_rows = 20;
    $selected_row = mt_rand(0, $total_rows);
    /*
      Place code to connect to your DB here.
     */
//include('config.php');  // include your code to connect to DB.


    $tbl_name = "data";
   
// How many adjacent pages should be shown on each side?
    $adjacents = 3;

    /*
      First get total number of rows in data table.
      If you have a WHERE clause in your query, make sure you mirror it here.
     */
    $query = "SELECT COUNT(*) as num FROM $tbl_name";
//echo $query;
    $total_pages = mysql_fetch_array(mysql_query($query));
    $total_pages = $total_pages['num'];

    /* Setup vars for query. */
    $targetpage = "page3.php";  //your file name  (the name of this file)
    
     //UPDATE 2.0 
     //Create the lines below to get k=world&x=9&y=2 and include links. Please see changes in link below:
    /*
    $k = ((isset($_GET['k']))? "&k=".$_GET['k'] : "" );
    $x = ((isset($_GET['x']))? "&x=".$_GET['x']: "" );
    $y = ((isset($_GET['y']))? "&y=".$_GET['y'] : "" );
    $query_string = $k.$x.$y;
    */
    
    //UPDATE 3.0
    //MORE DYNAMIC should you decide to change the url parameters used.
    $q = $_SERVER['QUERY_STRING'];
    if($q != ""){
       $q_a = explode('&', $q);
       $q_b = array();
       $q_c = array();
       $link = "";
       foreach($q_a as $param){
           $q_b[] = explode('=', $param);
           foreach($q_b as $key => $value){
               $q_c[$value[0]] = $value[1];
           }
       }
        unset($q_c['page']);
    }
    foreach($q_c as $key => $value){
        $link .= "&";
        $link .= $key.'='.$value;    
    }
    
    $query_string = $link;
    
    $limit = 4;
    //how many    items to show per page
    $page = isset($_GET['page']);
        
    
    $page = $this->uri->segment(3);
    if ($page)
        $start = ($page - 1) * $limit;
    //first item to display on this page
    else
        $start = 0;
    //if no page var is given, set start to 0

    /* Get data. */
    $sql = "SELECT * FROM $tbl_name LIMIT $start, $limit";

    $result = mysql_query($sql) or die($sql . "<br>" . mysql_error());

    /* Setup page vars for display. */
    if ($page == 0)
        $page = 1;                  //if no page var is given, default to 1.
    $prev = $page - 1;                          //previous page is page - 1
    $next = $page + 1;                          //next page is page + 1
    $lastpage = ceil($total_pages / $limit);      //lastpage is = total pages / items per page, rounded up.
    $lpm1 = $lastpage - 1;                      //last page minus 1

    /*
      Now we apply our rules and draw the pagination object.
      We're actually saving the code to a variable in case we want to draw it more than once.
     */
    $pagination = "";
    if ($lastpage > 1) {
        $pagination .= "<div class=\"pagination\">";
        //previous button
        if ($page > 1)
            $pagination.= "<a href=\"$targetpage?page=$prev{$query_string}\">previous</a>";
        else
            $pagination.= "<span class=\"disabled\">previous</span>";

        //pages 
        if ($lastpage < 7 + ($adjacents * 2)) {   //not enough pages to bother breaking it up
            for ($counter = 1; $counter <= $lastpage; $counter++) {

                if ($counter == (int) $page) {
                    $pagination.= "<span class=\"current\">$counter</span>";
                } else {
                    $pagination.= "<a href=\"$targetpage?page=$counter{$query_string}\">$counter</a>";
                }
            }
        } elseif ($lastpage > 5 + ($adjacents * 2)) {    //enough pages to hide some
            //close to beginning; only hide later pages
            if ($page < 1 + ($adjacents * 2)) {
                for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++) {
                    if ($counter == (int) $page) {
                        $pagination.= "<span class=\"current\">$counter</span>";
                    } else {
                        $pagination.= "<a href=\"$targetpage?page=$counter{$query_string}\">$counter</a>";
                    }
                }
                $pagination.= "...";
                $pagination.= "<a href=\"$targetpage?page=$lpm1.$query_string\">$lpm1</a>";
                $pagination.= "<a href=\"$targetpage?page=$lastpage{$query_string}\">$lastpage</a>";
            }
            //in middle; hide some front and some back
            elseif ($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2)) {
                $pagination.= "<a href=\"$targetpage?page=1{$query_string}\">1</a>";
                $pagination.= "<a href=\"$targetpage?page=2{$query_string}\">2</a>";
                $pagination.= "...";
                for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++) {
                    if ($counter == $page)
                        $pagination.= "<span class=\"current\">$counter</span>";
                    else
                        $pagination.= "<a href=\"$targetpage?page=$counter{$query_string}\">$counter</a>";
                }
                $pagination.= "...";
                $pagination.= "<a href=\"$targetpage?page=$lpm1{$query_string}\">$lpm1</a>";
                $pagination.= "<a href=\"$targetpage?page=$lastpage{$query_string}\">$lastpage</a>";
            }
            //close to end; only hide early pages
            else {
                $pagination.= "<a href=\"$targetpage?page=1{$query_string}\">1</a>";
                $pagination.= "<a href=\"$targetpage?page=2{$query_string}\">2</a>";
                $pagination.= "...";
                for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++) {
                    if ($counter == $page)
                        $pagination.= "<span class=\"current\">$counter</span>";
                    else
                        $pagination.= "<a href=\"$targetpage?page=$counter{$query_string}\">$counter</a>";
                }
            }
        }

        //next button
        if ($page < $counter - 1)
            $pagination.= "<a href=\"$targetpage?page=$next{$query_string}\">next</a>";
        else
            $pagination.= "<span class=\"disabled\">next</span>";
        $pagination.= "</div>\n";
    }
    ?>

    <?php
    while ($row = mysql_fetch_assoc($result)) {

        // Your while loop here

        $title = $row['course_title'];
        $link = $row['course_description'];
        $region = $row['course_fee'];
        $sector = $row['diploma_fee'];
        $theme = $row['course_duration'];
        /*
          $title = $row['title'];
          $link = $row['link'];
          $region = $row['region'];
          $sector = $row['sector'];
          $theme = $row['theme'];
         */
        echo "<tr>";
        echo "<td>";
        echo "<div class='admonition'>";
        echo "<div class='admonition-title'>";
        echo "<a href=$link><h3>$title<h3></a>";
        echo "</div>";
        echo "</div>";
        echo "<h4>Sector: $sector&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Theme: $theme &nbsp; 
        &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br> Region: $region <hr> </td>";
        echo "</tr>";
    }
    ?>

<?php echo $pagination; ?>

除此之外,从我的角度来看,一切似乎都很好。

于 2013-03-03T23:01:40.047 回答