根据我数据库中的许多记录，所以当我从数据库中获取并显示它时，显示的内容很长。现在，我使用了分页。所以用户很容易看到内容。我从数据库中获取数据并使用表显示它。如果用户单击表头 (tr)，它将按降序/升序排序（奇数点击 ==> 降序，事件点击 ==> 升序）。我面临的问题是：当我单击表格标题时，它将按降序/升序显示该顺序的内容。但是当我单击分页链接（第 2 页或下一页）时，它将转到第二页，但它不再按降序/升序排列。我想如果我单击表头并单击第二页或其他页面的分页链接，它将转到我单击的页面并按降序/升序排序。
这是我的分页代码
<?php
class PS_Pagination {
var $php_self;
var $rows_per_page = 10; //Number of records to display per page
var $total_rows = 0; //Total number of rows returned by the query
var $links_per_page = 5; //Number of links to display per page
var $append = ""; //Paremeters to append to pagination links
var $sql = "";
var $debug = false;
var $conn = false;
var $page = 1;
var $max_pages = 0;
var $offset = 0;
/**
* Constructor
*
* @param resource $connection Mysql connection link
* @param string $sql SQL query to paginate. Example : SELECT * FROM users
* @param integer $rows_per_page Number of records to display per page. Defaults to 10
* @param integer $links_per_page Number of links to display per page. Defaults to 5
* @param string $append Parameters to be appended to pagination links
*/
function PS_Pagination($connection, $sql, $rows_per_page = 10, $links_per_page = 5, $append = "") {
$this->conn = $connection;
$this->sql = $sql;
$this->rows_per_page = (int)$rows_per_page;
if (intval($links_per_page ) > 0) {
$this->links_per_page = (int)$links_per_page;
} else {
$this->links_per_page = 5;
}
$this->append = $append;
$this->php_self = htmlspecialchars($_SERVER['PHP_SELF'] );
if (isset($_GET['page'] )) {
$this->page = intval($_GET['page'] );
}
}
/**
* Executes the SQL query and initializes internal variables
*
* @access public
* @return resource
*/
function paginate() {
//Check for valid mysql connection
if (! $this->conn || ! is_resource($this->conn )) {
if ($this->debug)
echo "MySQL connection missing<br />";
return false;
}
//Find total number of rows
$all_rs = @mysql_query($this->sql );
if (! $all_rs) {
if ($this->debug)
echo "SQL query failed. Check your query.<br /><br />Error Returned: " . mysql_error();
return false;
}
$this->total_rows = mysql_num_rows($all_rs );
@mysql_close($all_rs );
//Return FALSE if no rows found
if ($this->total_rows == 0) {
if ($this->debug)
echo "Query returned zero rows.";
return FALSE;
}
//Max number of pages
$this->max_pages = ceil($this->total_rows / $this->rows_per_page );
if ($this->links_per_page > $this->max_pages) {
$this->links_per_page = $this->max_pages;
}
//Check the page value just in case someone is trying to input an aribitrary value
if ($this->page > $this->max_pages || $this->page <= 0) {
$this->page = 1;
}
//Calculate Offset
$this->offset = $this->rows_per_page * ($this->page - 1);
//Fetch the required result set
$rs = @mysql_query($this->sql . " LIMIT {$this->offset}, {$this->rows_per_page}" );
if (! $rs) {
if ($this->debug)
echo "Pagination query failed. Check your query.<br /><br />Error Returned: " . mysql_error();
return false;
}
return $rs;
}
/**
* Display the link to the first page
*
* @access public
* @param string $tag Text string to be displayed as the link. Defaults to 'First'
* @return string
*/
function renderFirst($tag = 'First') {
if ($this->total_rows == 0)
return FALSE;
if ($this->page == 1) {
return "$tag ";
} else {
return '<a style="color:#3366FF;" href="' . $this->php_self . '?page=1&' . $this->append . '">' . $tag . '</a> ';
}
}
/**
* Display the link to the last page
*
* @access public
* @param string $tag Text string to be displayed as the link. Defaults to 'Last'
* @return string
*/
function renderLast($tag = 'Last') {
if ($this->total_rows == 0)
return FALSE;
if ($this->page == $this->max_pages) {
return $tag;
} else {
return ' <a style="color:#3366FF;" href="' . $this->php_self . '?page=' . $this->max_pages . '&' . $this->append . '">' . $tag . '</a>';
}
}
/**
* Display the next link
*
* @access public
* @param string $tag Text string to be displayed as the link. Defaults to '>>'
* @return string
*/
function renderNext($tag = '>>') {
if ($this->total_rows == 0)
return FALSE;
if ($this->page < $this->max_pages) {
return '<a style="color:#3366FF;" href="' . $this->php_self . '?page=' . ($this->page + 1) . '&' . $this->append . '">' . $tag . '</a>';
} else {
return $tag;
}
}
/**
* Display the previous link
*
* @access public
* @param string $tag Text string to be displayed as the link. Defaults to '<<'
* @return string
*/
function renderPrev($tag = '<<') {
if ($this->total_rows == 0)
return FALSE;
if ($this->page > 1) {
return ' <a style="color:#3366FF;" href="' . $this->php_self . '?page=' . ($this->page - 1) . '&' . $this->append . '">' . $tag . '</a>';
} else {
return " $tag";
}
}
/**
* Display the page links
*
* @access public
* @return string
*/
function renderNav($prefix = '<span class="page_link">', $suffix = '</span>') {
if ($this->total_rows == 0)
return FALSE;
$batch = ceil($this->page / $this->links_per_page );
$end = $batch * $this->links_per_page;
if ($end == $this->page) {
//$end = $end + $this->links_per_page - 1;
//$end = $end + ceil($this->links_per_page/2);
}
if ($end > $this->max_pages) {
$end = $this->max_pages;
}
$start = $end - $this->links_per_page + 1;
$links = '';
for($i = $start; $i <= $end; $i ++) {
if ($i == $this->page) {
$links .= $prefix . " $i " . $suffix;
} else {
$links .= ' ' . $prefix . '<a style="color:#3366FF;" href="' . $this->php_self . '?page=' . $i . '&' . $this->append . '">' . $i . '</a>' . $suffix . ' ';
}
}
return $links;
}
/**
* Display full pagination navigation
*
* @access public
* @return string
*/
function renderFullNav() {
return $this->renderFirst() . ' ' . $this->renderPrev() . ' ' . $this->renderNav() . ' ' . $this->renderNext() . ' ' . $this->renderLast();
}
/**
* Set debug mode
*
* @access public
* @param bool $debug Set to TRUE to enable debug messages
* @return void
*/
function setDebug($debug) {
$this->debug = $debug;
}
}
?>
我的页面
<?php
session_start();
include('pagination/ps_pagination.php');
$sql = "SELECT * FROM contact_us";
$result = mysql_query($sql);
echo "<table border='1' width='90%' align='center' style='border-collapse:collapse; table-layout: fixed;'>";
echo "<tr>";
echo "<th width='40%'><a style='text-decoration:none; href='index.php?no'>No</a></th>";
echo "<th width='60%'><a style='text-decoration:none; href='index.php?name'>Name</a></th>";
echo "</tr>";
if(mysql_num_rows($result) <= 0){
echo "<tr>";
echo "<td colspan='2'>No user!</td>";
echo "</tr>";
}
else{
if(isset($_GET['no'])){
$count = 1;
$_SESSION['t_no'] = $_SESSION['t_no'] + $count;
if($_SESSION['t_no'] % 2 == 0){
$sql.=" ORDER BY No DESC";
}
else{
$sql.=" ORDER BY No ASC";
}
}
elseif(isset($_GET['name'])){
$count = 1;
$_SESSION['t_name'] = $_SESSION['t_name'] + $count;
if($_SESSION['t_name'] % 2 == 0){
$sql.=" ORDER BY User_Name DESC";
}
else{
$sql.=" ORDER BY User_Name ASC";
}
}
$final = $sql;
//Create a PS_Pagination object
$pager = new PS_Pagination($conn, $final, 40, 10); //only 10 records
//The paginate() function returns a mysql result set for the current page
$rs = $pager->paginate();
while($row = mysql_fetch_array($rs)){
echo "<tr style='cursor:pointer;'>";
echo "<td style='word-wrap:break-word;'>".$row['No']."</td>";
echo "<td style='word-wrap:break-word;'>".$row['User_Name']."</td>";
echo "</tr>";
}
}
echo "</table>";
echo "<br/>";
echo '<div style="text-align:center">'.$pager->renderFullNav().'</div>';
?>
你能帮我解决这个问题吗？我被它困住了好几天:(
预先感谢！