飞扬轻狂’s blog

构建分页导航
-by fallseir


join_url 和 split_url 参看这里

 echo multi_page($current_page_num,$is_page_end);
 echo multi_page($current_page_num,false,$item_count);
 echo multi_page($current_page_num,false,$item_count,$page_size);
 echo multi_page($current_page_num,false,$item_count,$page_size,$req_uri);

    function multi_page($page ,$is_page_end,$item_count=false,$page_size=10,$req_uri=false){
        if(!$req_uri)
            $req_uri=$_SERVER["REQUEST_URI"];
        list($path,$args)=split_url($req_uri);
        $html = "";
        if($item_count&&$item_count>$page_size){
            $p_count=ceil(($item_count-1)/$page_size);
            $s=$page-3;
            if($s<=1){
                $s=1;
            }else{
                $i=1;
                unset($args["p"]);
                $url=join_url($path,$args);
                $html .= "<a href="{$url}">$i</a> ";
                if($s>2)
                    $html.=".. ";
            }
            $e=$page+3;
            $end_str="";
            if($e>=$p_count){
                $e=$p_count;
            }else{
                $i=$p_count;
                $args["p"]=$i;
                $url=join_url($path,$args);
                $end_str= " <a href="{$url}">$i</a>";
                if(($e+1)<$p_count)
                    $end_str="..".$end_str;
            }
            for($i=$s;$i<=$e;$i++){
                if($i==$page){
                    $html .= "<b>$i</b> ";
                }else{
                    $args["p"]=$i;
                    if($i==1)
                        unset($args["p"]);
                    $url=join_url($path,$args);
                    $html .= "<a href="{$url}">$i</a> ";
                }
            }
            $html.=$end_str;
        }else{
            if($page>1){
                $args["p"]=$page-1;
                if($page-1==1)
                    unset($args["p"]);
                $url=join_url($path,$args);
                $html .= "<a href="{$url}">上一页</a> ";
            }
            if(!$is_page_end){
                $args["p"]=$page+1;
                $url=join_url($path,$args);
                $html .= " <a href="{$url}" >下一页</a>";
            }
        }
        return $html;
    }