分页类一
代码如下: GetIndexBar () . $page->GetPageInfo ();
print_r ( $result );
echo "
";
echo " ".$index."";
*/
class Page {
private $mTotalRowsNum = 0; // 总信息行数
private $mCurPageNumber = 1; // 当前所在页
private $mTotalPagesNum = 1; // 总页数
private $mQueryString; // 页面传递的数据(url?后的字符串)
private $mPageRowsNum = 20; // 每页显示行数
private $mIndexBarLength = 11; // 索引条的页数
private $mIndexBar = ''; // 页码索引条
private $mPageInfo = ''; // 分页信息
// 页码索引条样式
private $mNextButton = "";
private $mPreButton = "";
private $mFirstButton = "";
private $mLastButton = "";
private $mCssIndexBarCurPage = "font-weight:bold;color:#FF0000";
private $mCssIndexBarPage = '';
// 分页信息样式
private $mCssPageInfoNumFont = 'color:#FF0000';
private $mCssPageInfoFont = '';
// 构造方法
public function __construct(&$rSqlQuery,$userPageRowsNum = '') {
if (! is_array ( $rSqlQuery )) {
$this->SetDbPageBreak ( $rSqlQuery,$userPageRowsNum );
} else {
$this->SetArrayPageBreak ( $rSqlQuery,$userPageRowsNum );
}
}
// 设置数据库型分页
private function SetDbPageBreak(&$rSqlQuery,$userPageRowsNum = '') {
$this->SetDbTotalRowsNum ( $rSqlQuery );
$this->SetTotalPagesNum ( $userPageRowsNum );
if ($this->mTotalPagesNum > 1) {
$this->SetCurPageNumber ();
$this->SetSqlQuery ( $rSqlQuery );
$this->SetQueryString ();
$this->SetIndexBar ();
$this->SetPageInfo ();
}
}
// 设置数组型分页
private function SetArrayPageBreak(&$rArray,$userPageRowsNum = '',$userTotalRowsNum = '') {
$this->SetArrayTotalRowsNum ( $rArray,$userTotalRowsNum );
$this->SetTotalPagesNum ( $userPageRowsNum );
if ($this->mTotalPagesNum > 1) {
$this->SetCurPageNumber ();
$this->SetArray ( $rArray );
$this->SetQueryString ();
$this->SetIndexBar ();
$this->SetPageInfo ();
}
}
// 数据库型计算总行数
private function SetDbTotalRowsNum($rSqlQuery) {
$this->mTotalRowsNum = mysql_num_rows ( mysql_query ( $rSqlQuery ) );
}
// 数组型计算总行数
private function SetArrayTotalRowsNum($array) {
$this->mTotalRowsNum = count ( $array );
}
// 计算总页数
private function SetTotalPagesNum($userPageRowsNum = '') {
if ($userPageRowsNum) {
$this->mPageRowsNum = $userPageRowsNum;
}
$this->mTotalPagesNum = ( int ) (floor ( ($this->mTotalRowsNum - 1) / $this->mPageRowsNum ) + 1);
}
// 计算当前页数
private function SetCurPageNumber() {
if ($_GET ['page']) {
$this->mCurPageNumber = $_GET ['page'];
}
}
// 修正Sql截取语句
private function SetSqlQuery(&$rSqlQuery) {
$start_number = ($this->mCurPageNumber - 1) * $this->mPageRowsNum;
$rSqlQuery .= " LIMIT " . $start_number . "," . $this->mPageRowsNum;
}
// 修正截取后的Array
private function SetArray(&$rArray) {
$start_number = ($this->mCurPageNumber - 1) * $this->mPageRowsNum;
$rArray = array_slice ( $rArray,$start_number,$this->mPageRowsNum );
}
// 修正 $_GET 传递数据
private function SetQueryString() {
$query_string = $_SERVER ['QUERY_STRING'];
if ($query_string == '') {
$this->mQueryString = "?page=";
} else {
$this->mQueryString = preg_replace ( "/&?page=d+/",'',$query_string );
$this->mQueryString = "?" . $this->mQueryString . "&page=";
}
}
// 设置页码索引条
private function GetPageIndex() {
if ($this->mTotalPagesNum <= $this->mIndexBarLength) {
$first_number = 1;
$last_number = $this->mTotalPagesNum;
} else {
$offset = ( int ) floor ( $this->mIndexBarLength / 2 );
if (($this->mCurPageNumber - $offset) <= 1) {
$first_number = 1;
} elseif (($this->mCurPageNumber + $offset) > $this->mTotalPagesNum) {
$first_number = $this->mTotalPagesNum - $this->mIndexBarLength + 1;
} else {
$first_number = $this->mCurPageNumber - $offset;
}
$last_number = $first_number + $this->mIndexBarLength - 1;
}
$last_number;
for($i = $first_number; $i <= $last_number; $i ++) {
if ($this->mCurPageNumber == $i) {
$page_index .= "" . $i . " ";
} else {
$page_index .= " mQueryString . $i . "' style='" . $this->mCssIndexBarPage . "'>" . $i . " ";
}
}
return $page_index;
}
// 设置页码索引条
private function SetIndexBar() {
$this->mIndexBar = $this->GetNavFirstButton ();
$this->mIndexBar .= $this->GetNavPreButton ();
$this->mIndexBar .= $this->GetPageIndex ();
$this->mIndexBar .= $this->GetNavNextButton ();
$this->mIndexBar .= $this->GetNavLastButton ();
}
// 得到页码索引条 首页按钮
private function GetNavFirstButton() {
return "mQueryString . "1'>" . $this->mFirstButton . " ";
}
// 得到页码索引条 上一页按钮
private function GetNavPreButton() {
if ($this->mCurPageNumber > 1) {
$pre_number = $this->mCurPageNumber - 1;
} else {
$pre_number = 1;
}
return "mQueryString . $pre_number . "'>" . $this->mPreButton . " ";
}
// 得到页码索引条 下一页按钮
private function GetNavNextButton() {
if ($this->mCurPageNumber < $this->mTotalPagesNum) {
$next_number = $this->mCurPageNumber + 1;
} else {
$next_number = $this->mTotalPagesNum;
}
return "mQueryString . $next_number . "'>" . $this->mNextButton . " ";
}
// 得到页码索引条 末页按钮
private function GetNavLastButton() {
return "mQueryString . $this->mTotalPagesNum . "'>" . $this->mLastButton . " ";
}
// 设置分页信息
private function SetPageInfo() {
$this->mPageInfo = "";
$this->mPageInfo .= "共 " . $this->mTotalRowsNum . " 条信息 | ";
$this->mPageInfo .= "" . $this->mPageRowsNum . " 条/页 | ";
$this->mPageInfo .= "共 " . $this->mTotalPagesNum . " 页 | ";
$this->mPageInfo .= "第 " . $this->mCurPageNumber . " 页";
$this->mPageInfo .= "";
}
// 取出页码索引条
public function GetIndexBar() {
return $this->mIndexBar;
}
// 取出分页信息
public function GetPageInfo() {
return $this->mPageInfo;
}
//释放类
function __destruct() {
}
}
?>
分页类二
代码如下: - ".min($firstcount+$displaypg,$totle)." 条记录，共 $totle 条记录";
//如果只有一页则跳出函数：
if($lastpg<=1) return false;
$pagenav.=" 首页 ";
if($prepg) $pagenav.=" 前页 "; else $pagenav.=" 前页 ";
if($nextpg) $pagenav.=" 后页 "; else $pagenav.=" 后页 ";
$pagenav.=" 尾页 ";
//下拉跳转列表，循环列出所有页码：
$pagenav.=" 到第 页，共 $lastpg 页";
}
}
//-------------------------具体演示举例-------------------------------
/*
//（前面程序略）
include("pageft.php"); //包含“pageft.php”文件
//取得总信息数
$result=mysql_query("select * from mytable");
$total=mysql_num_rows($result);
//调用pageft()，每页显示10条信息（使用默认的20时，可以省略此参数），使用本页URL（默认，所以省略掉）。
pageft($total,10);
//现在产生的全局变量就派上用场了：
$result=mysql_query("select * from mytable limit $firstcount,$displaypg ");
while($row=mysql_fetch_array($result)){
//（列表内容略）
}
//输出分页导航条代码：
echo $pagenav;
//（后面程序略）
*/
?>
分页类系列之三
代码如下: total=$total;
$this->page=$page;
$this->num=$num;
$this->pageNum=$this->getPageNum();
$this->offset=$this->getOffset();
}
private function getPageNum(){
return ceil($this->total/$this->num);
}
private function getNextPage() {
if($this->page==$this->pageNum)
return false;
else
return $this->page+1;
}
private function getPrevPage() {
if($this->page==1)
return false;
else
return $this->page-1;
}
//数据库查询的偏移量
private function getOffset() {
return ($this->page-1)*$this->num;
}
//当前页开始的记录数
private function getStartNum() {
if($this->total==0)
return 0;
else
return $this->offset+1;
}
//当前页结束的记录数
private function getEndNum() {
return min($this->offset+$this->num,$this->total);
}
public function getPageInfo(){
$pageInfo=array(
"row_total" => $this->total,
"row_num" => $this->num,
"page_num" => $this->getPageNum(),
"current_page" => $this->page,
"row_offset" => $this->getOffset(),
"next_page" => $this->getNextPage(),
"prev_page" => $this->getPrevPage(),
"page_start" => $this->getStartNum(),
"page_end" => $this->getEndNum()
);
return $pageInfo;
}
}
?>
3种分页类使用起来效率都不错，也都很简单，这里推荐给大家。 （编辑：李大同）
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