我对从 PHP 中的 MySQL 数据库获取的数据进行分页时遇到问题。
我的代码如下。基本上发生的情况是它创建了适量的页面，但是每个页面显示相同的数据，甚至每页仅显示 5 行。
我真的被困住了。这是我第一次尝试分页。任何帮助将不胜感激。
$pagenum = $_GET['pagenum'];
if (!(isset($pagenum)))
{
$pagenum = 1;
} else
{
$pagenum = $_GET['pagenum'];
}
//Count the number of results.
$data = mysql_query("SELECT * FROM `articles` WHERE `content` = '' AND `requestedby` != '$id'") or die(mysql_error());
$rows = mysql_num_rows($data);
//Set the number of results to be displayed per page.
$page_rows = 5;
//This tells us the page number of our last page
$last = ceil($rows/$page_rows);
//this makes sure the page number isn't below one, or more than our maximum pages
if ($pagenum < 1)
{
$pagenum = 1;
} elseif ($pagenum > $last)
{
$pagenum = $last;
}
//This sets the range to display in our query
$max = 'LIMIT ' . ($pagenum - 1) * $page_rows .',' .$page_rows;
//This is the query again, the same one... the only difference is we add $max into it.
$data_p = mysql_query("SELECT * FROM `articles` WHERE `content` = '' AND `requestedby` != '$id' '$max'") or die(mysql_error());
//Work out writers earnings based on prices.
//100 Words - $1.25
//300 Words - $2.50
//500 Words - $4.00
//700 Words - $5.50
//1000 Words - $8.00
$_100earnings = "0.65";
$_300earnings = "1.25";
$_500earnings = "2.50";
$_700earnings = "3.00";
$_1000earnings = "5.00";
?>
<!-- main -->
<div id="main">
<center><h2>Write Articles</h2></center>
<br />Available Projects:
<table border="1">
<tr>
<td>Title:</td>
<td>Length:</td>
<td>Writers Earnings:</td>
</tr>
<?php
//This is where you display your query results
while($info = mysql_fetch_array($data_p))
{
echo "<tr>";
echo "<td>" . $info['keywords'] . "</td>";
echo "<td>" . $info['length'] . "</td>";
switch ($info['length'])
{
case 100:
$writersearnings = $_100earnings;
break;
case 300:
$writersearnings = $_300earnings;
break;
case 500:
$writersearnings = $_500earnings;
break;
case 700:
$writersearnings = $_700earnings;
break;
case 1000:
$writersearnings = $_1000earnings;
break;
}
echo "<td>$" . $writersearnings . "</td>";
//echo $info['Name'];
echo "</tr>";
}
?>
</table>
<br /><br />
<?php
// This shows the user what page they are on, and the total number of pages
echo " --Page $pagenum of $last-- <p>";
// First we check if we are on page one. If we are then we don't need a link to the previous page or the first page so we do nothing. If we aren't then we generate links to the first page, and to the previous page.
if ($pagenum == 1)
{
} else
{
echo " <a href='{$_SERVER['PHP_SELF']}?pagenum=1'> <<-First</a> ";
echo " ";
$previous = $pagenum - 1;
echo " <a href='{$_SERVER['PHP_SELF']}?pagenum=$previous'> <-Previous</a> ";
}
//just a spacer
echo " ---- ";
//This does the same as above, only checking if we are on the last page, and then generating the Next and Last links
if ($pagenum == $last)
{
} else
{
$next = $pagenum + 1;
echo " <a href='{$_SERVER['PHP_SELF']}?pagenum=$next'>Next -></a> ";
echo " ";
echo " <a href='{$_SERVER['PHP_SELF']}?pagenum=$last'>Last ->></a> ";
}