您好我正在尝试在动态页面上进行分页。 我在我的脚本中使用PDO。我想要包含的分页脚本是mysql而不是PDO所以我将mysql函数更改为PDO函数。但我的问题是使用mysql的脚本和pdo没有的脚本。如果我在PDO脚本中单击下一页或第2页，我也会得到所有前10条记录，但我无法转到上一页。在我的mysql脚本中它可以正常工作！
我在Stackoverflow和互联网上搜索了一个解决方案，但我找不到一个，所以有人知道我做错了什么吗？或者我如何解决这个问题？
我启用了错误处理。我从PDO脚本中得到的唯一错误信息是：
Notice: Undefined index: page on line 22
但是当我点击下一步时，我不再收到此错误消息。
我的PDO脚本：
<?php
include('php/loginHandlerconnect.php');
$db = loginHandlerconnect();
ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(-1);
$tableName="vacature";
$targetpage = "testpaging3.php";
$limit = 10;
$query = "SELECT COUNT(vacatureID) AS num FROM $tableName";
$stmt = $db->prepare($query);
$stmt->execute();
$total_pages = $stmt->fetch(PDO::FETCH_ASSOC);
$total_pages = $total_pages['num'];
var_dump($total_pages); // output: string(2) "11" > after clicking on next: string(2) "11" string(1) "2"
$stages = 3;
var_dump($_GET['page']); // output: NULL
$page = (isset($_GET['page']));
if($page){
$start = ($page - 1) * $limit;
}else{
$start = 0;
}
// Get page data
$query1 = "SELECT vacature.*, werkgever.image, werkgever.plaats, werkgever.provincie, werkgever.naamBedrijf FROM vacature LEFT JOIN werkgever ON (vacature.werkgeverID = werkgever.werkgeverID) ORDER BY vacature.datum DESC LIMIT $start, $limit";
$result = $db->prepare($query1);
$result->execute();
$results = $result->fetchAll();
// Initial page num setup
if ($page == 0){$page = 1;}
$prev = $page - 1;
$next = $page + 1;
$lastpage = ceil($total_pages/$limit);
$LastPagem1 = $lastpage - 1;
$paginate = '';
if($lastpage > 1)
{
$paginate .= "<div class='paginate'>";
// Previous
if ($page > 1){
$paginate.= "<a href='$targetpage?page=$prev'>previous</a>";
}else{
$paginate.= "<span class='disabled'>previous</span>"; }
// Pages
if ($lastpage < 7 + ($stages * 2)) // Not enough pages to breaking it up
{
for ($counter = 1; $counter <= $lastpage; $counter++)
{
if ($counter == $page){
$paginate.= "<span class='current'>$counter</span>";
}else{
$paginate.= "<a href='$targetpage?page=$counter'>$counter</a>";}
}
}
elseif($lastpage > 5 + ($stages * 2)) // Enough pages to hide a few?
{
// Beginning only hide later pages
if($page < 1 + ($stages * 2))
{
for ($counter = 1; $counter < 4 + ($stages * 2); $counter++)
{
if ($counter == $page){
$paginate.= "<span class='current'>$counter</span>";
}else{
$paginate.= "<a href='$targetpage?page=$counter'>$counter</a>";}
}
$paginate.= "...";
$paginate.= "<a href='$targetpage?page=$LastPagem1'>$LastPagem1</a>";
$paginate.= "<a href='$targetpage?page=$lastpage'>$lastpage</a>";
}
// Middle hide some front and some back
elseif($lastpage - ($stages * 2) > $page && $page > ($stages * 2))
{
$paginate.= "<a href='$targetpage?page=1'>1</a>";
$paginate.= "<a href='$targetpage?page=2'>2</a>";
$paginate.= "...";
for ($counter = $page - $stages; $counter <= $page + $stages; $counter++)
{
if ($counter == $page){
$paginate.= "<span class='current'>$counter</span>";
}else{
$paginate.= "<a href='$targetpage?page=$counter'>$counter</a>";}
}
$paginate.= "...";
$paginate.= "<a href='$targetpage?page=$LastPagem1'>$LastPagem1</a>";
$paginate.= "<a href='$targetpage?page=$lastpage'>$lastpage</a>";
}
// End only hide early pages
else
{
$paginate.= "<a href='$targetpage?page=1'>1</a>";
$paginate.= "<a href='$targetpage?page=2'>2</a>";
$paginate.= "...";
for ($counter = $lastpage - (2 + ($stages * 2)); $counter <= $lastpage; $counter++)
{
if ($counter == $page){
$paginate.= "<span class='current'>$counter</span>";
}else{
$paginate.= "<a href='$targetpage?page=$counter'>$counter</a>";}
}
}
}
// Next
if ($page < $counter - 1){
$paginate.= "<a href='$targetpage?page=$next'>next</a>";
}else{
$paginate.= "<span class='disabled'>next</span>";
}
$paginate.= "</div>";
}
echo $total_pages.' Results'; // output: 11 Results
foreach($results as $row)
{
$date = date("d-m-Y", strtotime($row['datum']));
echo "
<div class='vacatureinfo2'>
<img class='userimg2' src='../../uploads/userimage/". $row['image'] ."' id='imge'/>
<p class='func-br-pl pull-left'>". $row['functie'] ." - ". $row['naamBedrijf'] ." - ". $row['plaats'] ."</p><p class='dtm pull-right'>". $date ."</p>
<div class='omschrijvingkort2'>
". $row['omschrijvingKort'] ."
</div>
<p class='pull-right'><a href='reactie?id=" . $row['vacatureID'] . "'>Reageer</a> | <a href='informatie-vacature?id=" . $row['vacatureID'] . "'>Meer informatie</a></p>
</div>
<hr>";
}
// pagination
echo $paginate; // output: previous12next (previous and 1 are not working after clicking on next or 2)
?>
我的mysql脚本：
<?php
include('connect.php');
ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(-1);
$tableName="vacature";
$targetpage = "testpaging2.php";
$limit = 10;
$query = "SELECT COUNT(vacatureID) as num FROM $tableName";
$total_pages = mysql_fetch_array(mysql_query($query));
$total_pages = $total_pages['num'];
var_dump($total_pages); // output: string(2) "11" > after clicking on next: string(2) "11" string(1) "2"
$stages = 3;
var_dump($_GET['page']); // output: NULL
$page = mysql_escape_string($_GET['page']);
if($page){
$start = ($page - 1) * $limit;
}else{
$start = 0;
}
// Get page data
$query1 = "SELECT vacature.*, werkgever.image, werkgever.plaats, werkgever.provincie, werkgever.naamBedrijf FROM vacature LEFT JOIN werkgever ON (vacature.werkgeverID = werkgever.werkgeverID) ORDER BY vacature.datum DESC LIMIT $start, $limit";
$result = mysql_query($query1);
// Initial page num setup
if ($page == 0){$page = 1;}
$prev = $page - 1;
$next = $page + 1;
$lastpage = ceil($total_pages/$limit);
$LastPagem1 = $lastpage - 1;
$paginate = '';
if($lastpage > 1)
{
$paginate .= "<div class='paginate'>";
// Previous
if ($page > 1){
$paginate.= "<a href='$targetpage?page=$prev'>previous</a>";
}else{
$paginate.= "<span class='disabled'>previous</span>"; }
// Pages
if ($lastpage < 7 + ($stages * 2)) // Not enough pages to breaking it up
{
for ($counter = 1; $counter <= $lastpage; $counter++)
{
if ($counter == $page){
$paginate.= "<span class='current'>$counter</span>";
}else{
$paginate.= "<a href='$targetpage?page=$counter'>$counter</a>";}
}
}
elseif($lastpage > 5 + ($stages * 2)) // Enough pages to hide a few?
{
// Beginning only hide later pages
if($page < 1 + ($stages * 2))
{
for ($counter = 1; $counter < 4 + ($stages * 2); $counter++)
{
if ($counter == $page){
$paginate.= "<span class='current'>$counter</span>";
}else{
$paginate.= "<a href='$targetpage?page=$counter'>$counter</a>";}
}
$paginate.= "...";
$paginate.= "<a href='$targetpage?page=$LastPagem1'>$LastPagem1</a>";
$paginate.= "<a href='$targetpage?page=$lastpage'>$lastpage</a>";
}
// Middle hide some front and some back
elseif($lastpage - ($stages * 2) > $page && $page > ($stages * 2))
{
$paginate.= "<a href='$targetpage?page=1'>1</a>";
$paginate.= "<a href='$targetpage?page=2'>2</a>";
$paginate.= "...";
for ($counter = $page - $stages; $counter <= $page + $stages; $counter++)
{
if ($counter == $page){
$paginate.= "<span class='current'>$counter</span>";
}else{
$paginate.= "<a href='$targetpage?page=$counter'>$counter</a>";}
}
$paginate.= "...";
$paginate.= "<a href='$targetpage?page=$LastPagem1'>$LastPagem1</a>";
$paginate.= "<a href='$targetpage?page=$lastpage'>$lastpage</a>";
}
// End only hide early pages
else
{
$paginate.= "<a href='$targetpage?page=1'>1</a>";
$paginate.= "<a href='$targetpage?page=2'>2</a>";
$paginate.= "...";
for ($counter = $lastpage - (2 + ($stages * 2)); $counter <= $lastpage; $counter++)
{
if ($counter == $page){
$paginate.= "<span class='current'>$counter</span>";
}else{
$paginate.= "<a href='$targetpage?page=$counter'>$counter</a>";}
}
}
}
// Next
if ($page < $counter - 1){
$paginate.= "<a href='$targetpage?page=$next'>next</a>";
}else{
$paginate.= "<span class='disabled'>next</span>";
}
$paginate.= "</div>";
}
echo $total_pages.' Results'; // output: 11 Results
while($row = mysql_fetch_array($result))
{
$date = date("d-m-Y", strtotime($row['datum']));
echo "
<div class='vacatureinfo2'>
<img class='userimg2' src='../../uploads/userimage/". $row['image'] ."' id='imge'/>
<p class='func-br-pl pull-left'>". $row['functie'] ." - ". $row['naamBedrijf'] ." - ". $row['plaats'] ."</p><p class='dtm pull-right'>". $date ."</p>
<div class='omschrijvingkort2'>
". $row['omschrijvingKort'] ."
</div>
<p class='pull-right'><a href='reactie?id=" . $row['vacatureID'] . "'>Reageer</a> | <a href='informatie-vacature?id=" . $row['vacatureID'] . "'>Meer informatie</a></p>
</div>
<hr>";
}
// pagination
echo $paginate; // output: previous12next (previous and 1 are working after clicking on next or 2)
?>
答案 0 :(得分：2)
如果这些问题在SO中几十次都没有得到解答，我会非常惊讶。
首先，这不是错误，这只是一个通知。这意味着$ _GET数组中没有'page'元素，但是你想在var_dump（$ _ GET ['page']）函数调用中访问它。
由于此行仅用于调试目的，因此您可以安全地将其注释掉。如果您是第一次加载页面，那么页面参数将不会被设置，因此它不存在就不足为奇了。
在尝试在以下行中使用它之前，您应该使用isset（）检查它的存在。
答案 1 :(得分：0)
更改行：
$page = (isset($_GET['page']));
以下内容：
$page = $_GET['page'];
比脚本有效！