<?php
/**
分頁(yè)類(lèi)
修改:Silence
Creatdate:2006-5-30
LastModify:2009-5-31
使用方法
$page = new page ( $result, 20 ); //$result為返回記錄集數(shù)組 ,20為返回每頁(yè)條數(shù)
$index = $page->GetIndexBar () . $page->GetPageInfo ();
print_r ( $result );
echo \"<br><br>\";
echo \"<center>\".$index.\"</center>\";
*/
class Page {
private $mTotalRowsNum = 0; // 總信息行數(shù)
private $mCurPageNumber = 1; // 當(dāng)前所在頁(yè)
private $mTotalPagesNum = 1; // 總頁(yè)數(shù)
private $mQueryString; // 頁(yè)面?zhèn)鬟f的數(shù)據(jù)(url?后的字符串)
private $mPageRowsNum = 20; // 每頁(yè)顯示行數(shù)
private $mIndexBarLength = 11; // 索引條的頁(yè)數(shù)
private $mIndexBar = ''; // 頁(yè)碼索引條
private $mPageInfo = ''; // 分頁(yè)信息
// 頁(yè)碼索引條樣式
private $mNextButton = \"<font style=\\"font-family:webdings\\">8</font>\";
private $mPreButton = \"<font style=\\"font-family:webdings\\">7</font>\";
private $mFirstButton = \"<font style=\\"font-family:webdings\\">9</font>\";
private $mLastButton = \"<font style=\\"font-family:webdings\\">:</font>\";
private $mCssIndexBarCurPage = \"font-weight:bold;color:#FF0000\";
private $mCssIndexBarPage = '';
// 分頁(yè)信息樣式
private $mCssPageInfoNumFont = 'color:#FF0000';
private $mCssPageInfoFont = '';
// 構(gòu)造方法
public function __construct(&$rSqlQuery, $userPageRowsNum = '') {
if (! is_array ( $rSqlQuery )) {
$this->SetDbPageBreak ( $rSqlQuery, $userPageRowsNum );
} else {
$this->SetArrayPageBreak ( $rSqlQuery, $userPageRowsNum );
}
}
// 設(shè)置數(shù)據(jù)庫(kù)型分頁(yè)
private function SetDbPageBreak(&$rSqlQuery, $userPageRowsNum = '') {
$this->SetDbTotalRowsNum ( $rSqlQuery );
$this->SetTotalPagesNum ( $userPageRowsNum );
if ($this->mTotalPagesNum > 1) {
$this->SetCurPageNumber ();
$this->SetSqlQuery ( $rSqlQuery );
$this->SetQueryString ();
$this->SetIndexBar ();
$this->SetPageInfo ();
}
}
// 設(shè)置數(shù)組型分頁(yè)
private function SetArrayPageBreak(&$rArray, $userPageRowsNum = '', $userTotalRowsNum = '') {
$this->SetArrayTotalRowsNum ( $rArray, $userTotalRowsNum );
$this->SetTotalPagesNum ( $userPageRowsNum );
if ($this->mTotalPagesNum > 1) {
$this->SetCurPageNumber ();
$this->SetArray ( $rArray );
$this->SetQueryString ();
$this->SetIndexBar ();
$this->SetPageInfo ();
}
}
// 數(shù)據(jù)庫(kù)型計(jì)算總行數(shù)
private function SetDbTotalRowsNum($rSqlQuery) {
$this->mTotalRowsNum = mysql_num_rows ( mysql_query ( $rSqlQuery ) );
}
// 數(shù)組型計(jì)算總行數(shù)
private function SetArrayTotalRowsNum($array) {
$this->mTotalRowsNum = count ( $array );
}
// 計(jì)算總頁(yè)數(shù)
private function SetTotalPagesNum($userPageRowsNum = '') {
if ($userPageRowsNum) {
$this->mPageRowsNum = $userPageRowsNum;
}
$this->mTotalPagesNum = ( int ) (floor ( ($this->mTotalRowsNum - 1) / $this->mPageRowsNum ) + 1);
}
// 計(jì)算當(dāng)前頁(yè)數(shù)
private function SetCurPageNumber() {
if ($_GET ['page']) {
$this->mCurPageNumber = $_GET ['page'];
}
}
// 修正Sql截取語(yǔ)句
private function SetSqlQuery(&$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 傳遞數(shù)據(jù)
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 = \"?\" . $this->mQueryString . \"&page=\";
}
}
// 設(shè)置頁(yè)碼索引條
private function GetPageIndex() {
if ($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 .= \"<font style='\" . $this->mCssIndexBarCurPage . \"'>\" . $i . \"</font> \";
} else {
$page_index .= \" <a href='\" . $this->mQueryString . $i . \"' style='\" . $this->mCssIndexBarPage . \"'>\" . $i . \"</a> \";
}
}
return $page_index;
}
// 設(shè)置頁(yè)碼索引條
private function SetIndexBar() {
$this->mIndexBar = $this->GetNavFirstButton ();
$this->mIndexBar .= $this->GetNavPreButton ();
$this->mIndexBar .= $this->GetPageIndex ();
$this->mIndexBar .= $this->GetNavNextButton ();
$this->mIndexBar .= $this->GetNavLastButton ();
}
// 得到頁(yè)碼索引條 首頁(yè)按鈕
private function GetNavFirstButton() {
return \"<a href='\" . $this->mQueryString . \"1'>\" . $this->mFirstButton . \"</a> \";
}
// 得到頁(yè)碼索引條 上一頁(yè)按鈕
private function GetNavPreButton() {
if ($this->mCurPageNumber > 1) {
$pre_number = $this->mCurPageNumber - 1;
} else {
$pre_number = 1;
}
return \"<a href='\" . $this->mQueryString . $pre_number . \"'>\" . $this->mPreButton . \"</a> \";
}
// 得到頁(yè)碼索引條 下一頁(yè)按鈕
private function GetNavNextButton() {
if ($this->mCurPageNumber < $this->mTotalPagesNum) {
$next_number = $this->mCurPageNumber + 1;
} else {
$next_number = $this->mTotalPagesNum;
}
return \"<a href='\" . $this->mQueryString . $next_number . \"'>\" . $this->mNextButton . \"</a> \";
}
// 得到頁(yè)碼索引條 末頁(yè)按鈕
private function GetNavLastButton() {
return \"<a href='\" . $this->mQueryString . $this->mTotalPagesNum . \"'>\" . $this->mLastButton . \"</a> \";
}
// 設(shè)置分頁(yè)信息
private function SetPageInfo() {
$this->mPageInfo = \"<font style='\" . $this->mCssPageInfoFont . \"'>\";
$this->mPageInfo .= \"共 <font style='\" . $this->mCssPageInfoNumFont . \"'>\" . $this->mTotalRowsNum . \"</font> 條信息 | \";
$this->mPageInfo .= \"<font style='\" . $this->mCssPageInfoNumFont . \"'>\" . $this->mPageRowsNum . \"</font> 條/頁(yè) | \";
$this->mPageInfo .= \"共 <font style='\" . $this->mCssPageInfoNumFont . \"'>\" . $this->mTotalPagesNum . \"</font> 頁(yè) | \";
$this->mPageInfo .= \"第 <font style='\" . $this->mCssPageInfoNumFont . \"'>\" . $this->mCurPageNumber . \"</font> 頁(yè)\";
$this->mPageInfo .= \"</font>\";
}
// 取出頁(yè)碼索引條
public function GetIndexBar() {
return $this->mIndexBar;
}
// 取出分頁(yè)信息
public function GetPageInfo() {
return $this->mPageInfo;
}
//釋放類(lèi)
function __destruct() {
}
}
?>

<?php
/*
* Created on 2007-6-8
* Programmer : Alan , Msn - haowubai@hotmail.com
* KeBeKe.com Develop a project PHP - MySQL - Apache
* Window - Preferences - PHPeclipse - PHP - Code Templates
*/
//為了避免重復(fù)包含文件而造成錯(cuò)誤，加了判斷函數(shù)是否存在的條件：
if(!function_exists(pageft)){
//定義函數(shù)pageft(),三個(gè)參數(shù)的含義為：
//$totle：信息總數(shù)；
//$displaypg：每頁(yè)顯示信息數(shù)，這里設(shè)置為默認(rèn)是20；
//$url：分頁(yè)導(dǎo)航中的鏈接，除了加入不同的查詢信息“page”外的部分都與這個(gè)URL相同。
//　　　默認(rèn)值本該設(shè)為本頁(yè)URL（即$_SERVER["REQUEST_URI"]），但設(shè)置默認(rèn)值的右邊只能為常量，所以該默認(rèn)值設(shè)為空字符串，在函數(shù)內(nèi)部再設(shè)置為本頁(yè)URL。
function pageft($totle,$displaypg=20,$url=''){
//定義幾個(gè)全局變量：
//$page：當(dāng)前頁(yè)碼；
//$firstcount：（數(shù)據(jù)庫(kù)）查詢的起始項(xiàng)；
//$pagenav：頁(yè)面導(dǎo)航條代碼，函數(shù)內(nèi)部并沒(méi)有將它輸出；
//$_SERVER：讀取本頁(yè)URL“$_SERVER["REQUEST_URI"]”所必須。
global $page,$firstcount,$pagenav,$_SERVER;
//為使函數(shù)外部可以訪問(wèn)這里的“$displaypg”，將它也設(shè)為全局變量。注意一個(gè)變量重新定義為全局變量后，原值被覆蓋，所以這里給它重新賦值。
$GLOBALS["displaypg"]=$displaypg;
if(!$page) $page=1;
//如果$url使用默認(rèn)，即空值，則賦值為本頁(yè)URL：
if(!$url){ $url=$_SERVER["REQUEST_URI"];}
//URL分析：
$parse_url=parse_url($url);
$url_query=$parse_url["query"]; //單獨(dú)取出URL的查詢字串
if($url_query){
//因?yàn)閁RL中可能包含了頁(yè)碼信息，我們要把它去掉，以便加入新的頁(yè)碼信息。
//這里用到了正則表達(dá)式，請(qǐng)參考“PHP中的正規(guī)表達(dá)式”
$url_query=ereg_replace("(^|&)page=$page","",$url_query);
//將處理后的URL的查詢字串替換原來(lái)的URL的查詢字串：
$url=str_replace($parse_url["query"],$url_query,$url);
//在URL后加page查詢信息，但待賦值：
if($url_query) $url.="&page"; else $url.="page";
}else {
$url.="?page";
}
//頁(yè)碼計(jì)算：
$lastpg=ceil($totle/$displaypg); //最后頁(yè)，也是總頁(yè)數(shù)
$page=min($lastpg,$page);
$prepg=$page-1; //上一頁(yè)
$nextpg=($page==$lastpg ? 0 : $page+1); //下一頁(yè)
$firstcount=($page-1)*$displaypg;
//開(kāi)始分頁(yè)導(dǎo)航條代碼：
$pagenav="顯示第 <B>".($totle?($firstcount+1):0)."</B>-<B>".min($firstcount+$displaypg,$totle)."</B> 條記錄，共 $totle 條記錄";
//如果只有一頁(yè)則跳出函數(shù)：
if($lastpg<=1) return false;
$pagenav.=" <a href='$url=1'>首頁(yè)</a> ";
if($prepg) $pagenav.=" <a href='$url=$prepg'>前頁(yè)</a> "; else $pagenav.=" 前頁(yè) ";
if($nextpg) $pagenav.=" <a href='$url=$nextpg'>后頁(yè)</a> "; else $pagenav.=" 后頁(yè) ";
$pagenav.=" <a href='$url=$lastpg'>尾頁(yè)</a> ";
//下拉跳轉(zhuǎn)列表，循環(huán)列出所有頁(yè)碼：
$pagenav.="　到第 <select name='topage' size='1' onchange='window.location=\"$url=\"+this.value'>\n";
for($i=1;$i<=$lastpg;$i++){
if($i==$page) $pagenav.="<option value='$i' selected>$i</option>\n";
else $pagenav.="<option value='$i'>$i</option>\n";
}
$pagenav.="</select> 頁(yè)，共 $lastpg 頁(yè)";
}
}

//-------------------------具體演示舉例-------------------------------
/*
//（前面程序略）
include("pageft.php"); //包含“pageft.php”文件
//取得總信息數(shù)
$result=mysql_query("select * from mytable");
$total=mysql_num_rows($result);
//調(diào)用pageft()，每頁(yè)顯示10條信息（使用默認(rèn)的20時(shí)，可以省略此參數(shù)），使用本頁(yè)URL（默認(rèn)，所以省略掉）。
pageft($total,10);
//現(xiàn)在產(chǎn)生的全局變量就派上用場(chǎng)了：
$result=mysql_query("select * from mytable limit $firstcount,$displaypg ");
while($row=mysql_fetch_array($result)){
//（列表內(nèi)容略）
}
//輸出分頁(yè)導(dǎo)航條代碼：
echo $pagenav;
//（后面程序略）
*/
?>

<?php
class Page {
    private $total; //查詢所有的數(shù)據(jù)總記錄數(shù)
    private $page; //當(dāng)前第幾頁(yè)
    private $num; //每頁(yè)顯示記錄的條數(shù)
    private $pageNum; //一共多少頁(yè)
    private $offset; //從數(shù)據(jù)庫(kù)中取記錄的開(kāi)始偏移數(shù)
    function __construct($total, $page=1, $num=5) {
        $this->total=$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 $this->page-1;
    }
    //數(shù)據(jù)庫(kù)查詢的偏移量
    private function getOffset() {
        return ($this->page-1)*$this->num;
    }
    //當(dāng)前頁(yè)開(kāi)始的記錄數(shù)
    private function getStartNum() {
        if($this->total==0)
        return 0;
        else
        return $this->offset+1;
    }
    //當(dāng)前頁(yè)結(jié)束的記錄數(shù)
    private function getEndNum() {
        return min($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;
    }
}
?>