一個很好用的PHP分頁類

class Page {

    // 分頁欄每頁顯示的頁數

    public $rollPage = 6;

    // 頁數跳轉時要帶的參數

    public $parameter  ;

    // 默認列表每頁顯示行數

    public $listRows = 20;

    // 起始行數

    public $firstRow    ;

    // 分頁總頁面數

    protected $totalPages  ;

    // 總行數

    protected $totalRows  ;

    // 當前頁數

    protected $nowPage    ;

    // 分頁的欄的總頁數

    protected $coolPages   ;

    // 分頁顯示定制

    protected $config  = array(

        'redirect'=>false,

        'header'=>'條記錄',

        'prev'=>'上一頁',

        'next'=>'下一頁',

        'first'=>'1',

        'last'=>'最后一頁',

        'theme'=>' <div class="part1">%upPage% %first%  %prePage%  %linkPage%  %nextPage% %downPage%</div> <div class="part2">共  %totalPage% 頁');

    // 默認分頁變量名

    protected $varPage;


/** 
 +---------------------------------------------------------- 
 * 架構函數 
 +---------------------------------------------------------- 
 * @access public 
 +---------------------------------------------------------- 
 * @param array $totalRows  總的記錄數 
 * @param array $listRows  每頁顯示記錄數 
 * @param array $parameter  分頁跳轉的參數 
 +---------------------------------------------------------- 
 */  
public function __construct($totalRows,$listRows='',$parameter='') {  
    $this->totalRows = $totalRows;  
    $this->parameter = $parameter;  
    $this->varPage = C('VAR_PAGE') ? C('VAR_PAGE') : 'p' ;  
    if(!empty($listRows)) {  
        $this->listRows = intval($listRows);  
    }  
    $this->totalPages = ceil($this->totalRows/$this->listRows);     //總頁數  
    $this->coolPages  = ceil($this->totalPages/$this->rollPage);  
    //$_GET驗證  
    $this->nowPage = intval($_GET[$this->varPage]);  
    $this->nowPage = $this->nowPage > 0 ? $this->nowPage : 1;  

    if(!empty($this->totalPages) && $this->nowPage>$this->totalPages) {  
        $this->nowPage = $this->totalPages;  
    }  
    $this->firstRow = $this->listRows*($this->nowPage-1);  
}  

public function setConfig($name,$value) {  
    if(isset($this->config[$name])) {  
        $this->config[$name]    =   $value;  
    }  
}  

/** 
 +---------------------------------------------------------- 
 * 分頁顯示輸出 
 +---------------------------------------------------------- 
 * @access public 
 +---------------------------------------------------------- 
 */  
public function show() {  

    if(0 == $this->totalRows) return '';  

    //處理參數  
    $p = $this->varPage;  
    $url  =  $_SERVER['REQUEST_URI'].(strpos($_SERVER['REQUEST_URI'],'?')?'':"?").$this->parameter;  
    $parse = parse_url($url);  
    if(isset($parse['query'])) {  
        parse_str($parse['query'],$params);  
        unset($params[$p]);  
        $url   =  $parse['path'].'?'.http_build_query($params);  
    }  

    /* 分頁邏輯  */         

    //當總數小于顯示的頁碼數  
    if ($this->totalPages <= $this->rollPage) {  
        $start = 1;  
        $end   = $this->totalPages;  
    }  
    else{  
        //  
        if  ($this->nowPage <= $this->rollPage - 1) {  
            $start = 1;  
            $end   = $this->rollPage;  

            $islast = true;  
        }    
        else if ($this->nowPage > $this->totalPages - $this->rollPage + 1) {  
            $start = $this->totalPages - ($this->rollPage - 1);  
            $end   = $this->totalPages;  

            $isfirst = true;  
        }  
        else{  
            //浮動數  
            $size = floor($this->rollPage / 2);  

            $start = $this->nowPage - $size;  
            $end   = $this->nowPage + $size;  

            $isfirst = true;  
            $islast = true;  
        }  
    }  

    //上下翻頁字符串  
    $upRow   = $this->nowPage - 1;  
    $downRow = $this->nowPage + 1;  


    /* 拼裝HTML */  

    //< 1...     ...last >  
    if ($isfirst){  
        $theFirst = "<a class='firstPage' href='".$url."&".$p."=1' >".$this->config['first']."</a>";  
    }  
    if ($islast){  
        $theEnd = "<a class='lastPage' href='".$url."&".$p."=$this->totalPages' >".$this->config['last']."</a>";  
    }  

    if ($upRow > 0){  
        $upPage = "<a class='upPage' href='".$url."&".$p."=$upRow'>".$this->config['prev']."</a>";  
    }  

    if ($downRow <= $this->totalPages){  
        $downPage = "<a class='downPage' href='".$url."&".$p."=$downRow'>".$this->config['next']."</a>";  
    }  

   if($start==3){  
        $linkPage .= "<a href='".$url."&".$p."=2'>2</a>";  
    }  
    if($start>=4){  
        $linkPage .= "<a href='".$url."&".$p."=2'>2</a> <span class='noEndClass'>...</span>";  
    }  
    //1 2 3 4 5  
    for($i=$start;$i<=$end;$i++){  
        if($i!=$this->nowPage){  
            $linkPage .= " <a href='".$url."&".$p."=$i'> ".$i." </a>";  
        }else{  
            $linkPage .= " <span class='current'>".$i."</span>";  
        }  
        if($i==$end){  
            if($i<$this->totalRows){  
                $linkPage .= " <span class='noEndClass'>...</span>";  
            }  
        }  
    }  

    $pageStr = str_replace(  
        array('%header%','%nowPage%','%totalRow%','%totalPage%','%upPage%','%first%','%prePage%','%linkPage%','%nextPage%','%downPage%','%end%'),  
        array($this->config['header'],$this->nowPage,$this->totalRows,$this->totalPages,$upPage,$theFirst,$prePage,$linkPage,$nextPage,$downPage,$theEnd),$this->config['theme']);  

    //顯示模式  普通false 帶跳轉ture  
    if (!empty($this->config['redirect'])){  
        $html = $pageStr;  

    }else{  
        //傳遞參數  
        if($this->totalPages > 1){  
            $redirect = " 到第 <form method='get' action=''><input name=".$p." type='text' class='page_text' size='3' maxlength='3' value='" . $this->nowPage ."'/> 頁 <input type='submit' class='page_btn' value='確定' />";  
            if ($params){  
                foreach($params as $k => $v){  
                    $string .= "<input type='hidden' name='" . $k . "' value='" . $v . "'/>";  
                }  
                $redirect = $redirect . $string . '</form></div>';  
            }else{  
                $redirect = $redirect . '</form></div>';  
            }  
        }  
        //生成Html字符串  
        $html = $pageStr . $redirect;         
    }    
    return $html;  
}  


} </pre>