CI框架简单分页类

本文实例讲述了CI框架简单分页类用法。分享给大家供大家参考，具体如下：

/**  *  * 关于 页码有效性的判断需要加在 控制器中判断，即当页码数1或者>
总页数  *  */ class Custom_pagination {
       VAR $page_url = '';
     //分页目标URL   var $page_size = 10;
     //每一页行数   var $page_num = 1;
    //页码   var $rows_num= '';
    //数据总行数   var $links_num= 3;
    //选中链接前后的链接数，必须大于等于1    var $anchor_class= '';
    //链接样式类   var $current_class= '';
    //当前页样式类   var $full_tag_oPEn= '';
    //分页开始标签   var $full_tag_close= '';
    //分页结束标签   var $info_tag_open= '';
       var $info_tag_close= ' ';
       var $First_tag_open= '';
       var $first_tag_close= ' ';
       var $last_tag_open= ' ';
       var $last_tag_close= '';
       var $cur_tag_open= ' strong>
    ';
       var $cur_tag_close= '/strong>
    ';
       var $next_tag_open= ' ';
       var $next_tag_close= ' ';
       var $prev_tag_open= ' ';
       var $PRev_tag_close= '';
       var $num_tag_open= ' ';
       var $num_tag_close= '';
    public function __construct($params = array())   {
         if (count($params) >
 0)     {
           $this->
    inIT($params);
     }
   }
     function init($params = array()) //初始化数据   {
         if (count($params) >
 0)     {
           foreach ($params as $key =>
 $val)       {
             if (isset($this->
$key))         {
               $this->
    $key = $val;
         }
       }
     }
   }
     function create_links()   {
         ///////////////////////////////////////////////////////     //准备数据     ///////////////////////////////////////////////////////     $page_url = $this->
    page_url;
         $rows_num = $this->
    rows_num;
         $page_size = $this->
    page_size;
         $links_num = $this->
    links_num;
      if ($rows_num == 0 OR $page_size == 0)     {
           return '';
     }
          $pages = intval($rows_num/$page_size);
     if ($rows_num % $page_size)     {
           //有余数pages+1       $pages++;
     }
    ;
         $page_num = $this->
    page_num  1 ? '1' : $this->
    page_num;
          $anchor_class = '';
         if($this->
anchor_class !== '')     {
           $anchor_class = 'class="'.$this->
    anchor_class.'" ';
     }
          $current_class = '';
         if($this->
current_class !== '')     {
           $current_class = 'class="'.$this->
    current_class.'" ';
     }
     if($pages == 1)     {
           return '';
     }
     if($links_num  0)     {
           return '- -！links_num必须大于等于0';
     }
         ////////////////////////////////////////////////////////     //创建链接开始     ////////////////////////////////////////////////////////     $output = $this->
    full_tag_open;
         $output .= $this->
    info_tag_open.'共'.$rows_num.'条数据 第 '.$page_num.'/'.$pages.' 页'.$this->
    info_tag_close;
         //首页     if($page_num >
 1)     {
           $output .= $this->
    first_tag_open.'a '.$anchor_class.' href="'.site_url($page_url).'" rel="external nofollow" >
    首页/a>
    '.$this->
    first_tag_close;
     }
         //上一页     if($page_num >
 1)     {
           $n = $page_num - 1;
           $output .= $this->
    prev_tag_open.'a '.$anchor_class.' href="'.site_url($page_url.'/'.$n).'" rel="external nofollow" rel="external nofollow" >
    上一页/a>
    '.$this->
    prev_tag_close;
     }
         //pages     for($i=1;
    $i=$pages;
$i++)     {
           $pl = $page_num - $links_num  0 ? 0 : $page_num - $links_num;
           $pr = $page_num + $links_num >
     $pages ? $pages : $page_num + $links_num;
       //判断链接个数是否太少，举例，假设links_num = 2，则链接个数不可少于 5 个，主要是 当page_num 等于 1， 2 和 n，n-1的时候       if($pr  2 * $links_num + 1)       {
             $pr = 2 * $links_num + 1;
       }
           if($pl >
 $pages-2 * $links_num)       {
             $pl = $pages - 2 * $links_num;
       }
       if($i == $page_num)       {
      //current page         $output .= $this->
    cur_tag_open.'span '.$current_class.' >
    '.$i.'/span>
    '.$this->
    cur_tag_close;
       }
    else if($i >
    = $pl &
    &
 $i = $pr)       {
             $output .= $this->
    num_tag_open.'a '.$anchor_class.' href="'.site_url($page_url.'/'.$i).'" rel="external nofollow" >
    '.$i.'/a>
    '.$this->
    num_tag_close;
       }
     }
     //下一页     if($page_num  $pages)     {
           $n = $page_num + 1;
           $output .= $this->
    next_tag_open.'a '.$anchor_class.' href="'.site_url($page_url.'/'.$n).'" rel="external nofollow" rel="external nofollow" >
    下一页/a>
    '.$this->
    next_tag_close;
     }
     //末页     if($page_num  $pages)     {
           $output .= $this->
    last_tag_open.'a '.$anchor_class.' href="'.site_url($page_url.'/'.$pages).'" rel="external nofollow" >
    末页/a>
    '.$this->
    last_tag_close;
     }
          $output.=$this->
    full_tag_close;
         return $output;
   }
 }
    

控制器里调用

$config['page_url'] = 'about/science';
     $config['page_size'] = $pagesize;
     $config['rows_num'] = $num_rows;
     $config['page_num'] = $page;
     $this->
    load->
    library('Custom_pagination');
     $this->
    custom_pagination->
    init($config);
     echo $this->
    custom_pagination->
    create_links();
    

?php class page{
          public $page;
     //当前页   public $pagenum;
     // 页数   public $pagesize;
 // 每页显示条数   public function __construct($count, $pagesize){
         $this->
    pagenum = ceil($count/$pagesize);
         $this->
    pagesize = $pagesize;
         $this->
    page =(isset($_GET['p'])&
    &
    $_GET['p']>
    0) ? intval($_GET['p']) : 1;
   }
   /**    * 获得 url 后面GET传递的参数    */    public function getUrl(){
           $url = 'index.php?'.http_build_query($_GET);
         $url = preg_replace('/[?,&
    ]p=(\w)+/','',$url);
         $url .= (strpos($url,"?") === false) ? '?' : '&
    ';
         return $url;
   }
   /**    * 获得分页HTML    */   public function getPage(){
         $url = $this->
    getUrl();
         $start = $this->
    page-5;
         $start=$start>
    0 ? $start : 1;
          $end  = $start+9;
         $end = $end$this->
    pagenum ? $end : $this->
    pagenum;
         $pagestr = '';
         if($this->
    page>
5){
           $pagestr = "a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=1".">
    首页/a>
     ";
     }
         if($this->
page!=1){
           $pagestr.= "a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".($this->
    page-1).">
    上一页/a>
    ";
     }
              for($i=$start;
    $i=$end;
$i++){
           $pagestr.= "a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".$i.">
    ".$i."/a>
     ";
                }
         if($this->
    page!=$this->
pagenum){
           $pagestr.="a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".($this->
    page+1).">
    下一页/a>
    ";
            }
         if($this->
    page+5$this->
pagenum){
           $pagestr.="a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".$this->
    pagenum.">
    尾页/a>
     ";
     }
         return $pagestr;
     }
    }
     // 测试代码 $page = new page(100,10);
     $str=$page->
    getPage();
     echo $str;
     ?>
    

推荐教程：《PHP》

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