php分頁類

<?php  

class Pages {

	//分頁
	//Tcount 總數
	//Tpage	 每頁顯示數量
	//p	當$p=3時，打開http://trunk.com/houtai/life/shop則跳轉到第3頁
	static function multi($Tcount, $Tpage, $p, $url='', $url1='') {
		
		$mu = "";
		//總頁數
		$z = ceil($Tcount / $Tpage);
		$l = 10;	//長度
		$v = $l/2;
		
		$diy = ($p>1 && $p<$z)?($p-1):0;
	    $mu.="<a href='".$url."1".$url1."' class='curved'>首頁</a>";
		$mu .= "\r\n";
		if($p-1>=1){
		  //$mu .= "<a href=\"".$url.$url1."\" title=\"上一頁\" class=\"pre\">上一頁</a>\r\n";
		 }
		if($p>$v) $mu .= "\r\n";
		//開始
		$ca = (($p - $v)<0) ? 0 : ($p - $v);
		//結束
		$cb = (($p + $v)>$z) ? $z : ($p + $v);
		
		if($cb-$ca<($l+1)){
			$x = ($l+1)-($cb-$ca);
			if($ca==0 && $cb<$z){
				if(($z-$cb)<$x){
					$cb = $cb + ($z-$cb);
				}else{
					$cb = $cb + $x;
				}
			}elseif($cb==$z && $ca>0){
				if(($ca-$x)<0){
					$ca = 0;
				}else{
					$ca = $ca - $x;
				}
			}
		}
		for($i=$ca;$i<$cb;$i++){
			//$pi = ($p==($i+1))?"class=\"current\"": "";
			if($p==($i+1)){
				$mu .= "<a class=\"active curved\">".intval($i+1)."</a>\r\n";
			}else{
				if($i==0){
					$mu .= "<a href=\"".$url.$url1."\" title=\"第".intval($i+1)."頁\" class=\"curved\">[".intval($i+1)."]</a>\r\n";
				}else{
					$mu .= "<a href=\"".$url.($i+1).$url1."\" title=\"第".intval($i+1)."頁\" class=\"curved\">[".intval($i+1)."]</a>\r\n";	
				}
			}
		}
		
		if(($p+$v)<$z) $mu .= "\r\n";
		$end = ($p<$z)?$p+1:$z;
		if($p+1<=$z){
		    //$mu .= "<a href=\"".$url.($p+1).$url1."\" title=\"下一頁\" class=\"pre\">下一頁</a>\r\n";
		    $mu .= "\r\n";
		}
		$mu.="<a href='".$url.$z.$url1."' class=\"curved\">末頁</a>";
		//$mu .= "\r\n";
		$mu.="   共{$Tcount}條記錄/{$z}頁";
		//$mu .= "\r\n";
		//$mu.="每頁顯示{$Tpage}條";
		return $mu;
	}	

}

//example: 
$sql = "select * from life_shop where id = {$id} order by order_id desc ";
$query = $this->db->query($sql);
$total = $query->num_rows();
$page_no = $page_no<1 ? 1 : $page_no;
$query = $this->db->query($sql." limit ".($page_no-1)*$this->pagesize.",".$this->pagesize);
$data['lists'] = $query->result_array();
		
$this->load->library('pages'); //加載上面的pages類
$data['pagestr'] = $this->pages->multi($total,$this->pagesize,$page_no,'/houtai/life/shop/','');  //頁面上輸出的pagestr字符串即爲分頁代碼      
$this->load->view('houtai/life/shop',$data);