我搜索了关于php分页,我发现一个网站谁解释代码非常好,我的问题是关于代码,每次我点击“下一步”链接,第2页必须结果。我不明白为什么第2页没有结果。这里是代码:分页错误没有记录在第二页
所有的<?php
mysql_connect("localhost", "root", "") or die(mysql_error());
mysql_select_db("kp_and_harang") or die(mysql_error());
if (!(isset($pagenum)))
{
$pagenum = 1;
}
$data = mysql_query("SELECT * FROM students") or die(mysql_error());
$rows = mysql_num_rows($data);
$page_rows = 4;
$last = ceil($rows/$page_rows);
if ($pagenum < 1)
{
$pagenum = 1;
}
elseif ($pagenum > $last)
{
$pagenum = $last;
}
$max = 'limit ' .($pagenum - 1) * $page_rows .',' .$page_rows;
$data_p = mysql_query("SELECT * FROM students $max") or die(mysql_error());
while($info = mysql_fetch_array($data_p))
{
Print $info['surname'];
echo "<br>";
}
echo "<p>";
echo " --Page $pagenum of $last-- <p>";
if ($pagenum == 1)
{
}
else
{
echo " <a href='{$_SERVER['PHP_SELF']}?pagenum=1'> <<-First</a> ";
echo " ";
$previous = $pagenum-1;
echo " <a href='{$_SERVER['PHP_SELF']}?pagenum=$previous'> <-Previous</a> ";
}
echo " ---- ";
if ($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> ";
}
?>
为什么不在每个页面上“回显”您的SQL语句?那么当你尝试使用phpMyAdmin中的SQL语句时,你应该明智地看看计算是否是错误的。顺便说一句:你的代码(缺少)缩进使得它很难阅读。 – ConcurrentHashMap 2013-02-12 13:42:32