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CI框架简单分页类

时间：2021-07-01 10:21:17 帮助过：103人阅读

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：


  1. /** 
  2.  * 
  3.  * 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 
  4.  * 
  5.  */ 
  6. class Custom_pagination 
  7. { 
  8.   var $page_url = ''; //分页目标URL 
  9.   var $page_size = 10; //每一页行数 
  10.   var $page_num = 1;//页码 
  11.   var $rows_num= '';//数据总行数 
  12.   var $links_num= 3;//选中链接前后的链接数，必须大于等于1 
  13.  
  14.   var $anchor_class= '';//链接样式类 
  15.   var $current_class= '';//当前页样式类 
  16.   var $full_tag_open= '';//分页开始标签 
  17.   var $full_tag_close= '';//分页结束标签 
  18.   var $info_tag_open= ''; 
  19.   var $info_tag_close= ' '; 
  20.   var $first_tag_open= ''; 
  21.   var $first_tag_close= ' '; 
  22.   var $last_tag_open= ' '; 
  23.   var $last_tag_close= ''; 
  24.   var $cur_tag_open= ' <strong>'; 
  25.   var $cur_tag_close= '</strong>'; 
  26.   var $next_tag_open= ' '; 
  27.   var $next_tag_close= ' '; 
  28.   var $prev_tag_open= ' '; 
  29.   var $prev_tag_close= ''; 
  30.   var $num_tag_open= ' '; 
  31.   var $num_tag_close= ''; 
  32.  
  33.   public function __construct($params = array()) 
  34.   { 
  35.     if (count($params) > 0) 
  36.     { 
  37.       $this->init($params); 
  38.     } 
  39.   } 
  40.   
  41.   function init($params = array()) //初始化数据 
  42.   { 
  43.     if (count($params) > 0) 
  44.     { 
  45.       foreach ($params as $key => $val) 
  46.       { 
  47.         if (isset($this->$key)) 
  48.         { 
  49.           $this->$key = $val; 
  50.         } 
  51.       } 
  52.     } 
  53.   } 
  54.   
  55.   function create_links() 
  56.   { 
  57.     /////////////////////////////////////////////////////// 
  58.     //准备数据 
  59.     /////////////////////////////////////////////////////// 
  60.     $page_url = $this->page_url; 
  61.     $rows_num = $this->rows_num; 
  62.     $page_size = $this->page_size; 
  63.     $links_num = $this->links_num; 
  64.  
  65.     if ($rows_num == 0 OR $page_size == 0) 
  66.     { 
  67.       return ''; 
  68.     } 
  69.  
  70.     $pages = intval($rows_num/$page_size); 
  71.     if ($rows_num % $page_size) 
  72.     { 
  73.       //有余数pages+1 
  74.       $pages++; 
  75.     }; 
  76.     $page_num = $this->page_num < 1 ? '1' : $this->page_num; 
  77.  
  78.     $anchor_class = ''; 
  79.     if($this->anchor_class !== '') 
  80.     { 
  81.       $anchor_class = 'class="'.$this->anchor_class.'" '; 
  82.     } 
  83.  
  84.     $current_class = ''; 
  85.     if($this->current_class !== '') 
  86.     { 
  87.       $current_class = 'class="'.$this->current_class.'" '; 
  88.     } 
  89.     if($pages == 1) 
  90.     { 
  91.       return ''; 
  92.     } 
  93.     if($links_num < 0) 
  94.     { 
  95.       return '- -！links_num必须大于等于0'; 
  96.     } 
  97.     //////////////////////////////////////////////////////// 
  98.     //创建链接开始 
  99.     //////////////////////////////////////////////////////// 
  100.     $output = $this->full_tag_open; 
  101.     $output .= $this->info_tag_open.'共'.$rows_num.'条数据 第 '.$page_num.'/'.$pages.' 页'.$this->info_tag_close; 
  102.     //首页 
  103.     if($page_num > 1) 
  104.     { 
  105.       $output .= $this->first_tag_open.'<a '.$anchor_class.' href="'.site_url($page_url).'" rel="external nofollow" >首页</a>'.$this->first_tag_close; 
  106.     } 
  107.     //上一页 
  108.     if($page_num > 1) 
  109.     { 
  110.       $n = $page_num - 1; 
  111.       $output .= $this->prev_tag_open.'<a '.$anchor_class.' href="'.site_url($page_url.'/'.$n).'" rel="external nofollow" rel="external nofollow" >上一页</a>'.$this->prev_tag_close; 
  112.     } 
  113.     //pages 
  114.     for($i=1;$i<=$pages;$i++) 
  115.     { 
  116.       $pl = $page_num - $links_num < 0 ? 0 : $page_num - $links_num; 
  117.       $pr = $page_num + $links_num > $pages ? $pages : $page_num + $links_num; 
  118.       //判断链接个数是否太少，举例，假设links_num = 2，则链接个数不可少于 5 个，主要是 当page_num 等于 1， 2 和 n，n-1的时候 
  119.       if($pr < 2 * $links_num + 1) 
  120.       { 
  121.         $pr = 2 * $links_num + 1; 
  122.       } 
  123.       if($pl > $pages-2 * $links_num) 
  124.       { 
  125.         $pl = $pages - 2 * $links_num; 
  126.       } 
  127.       if($i == $page_num) 
  128.       {  //current page 
  129.         $output .= $this->cur_tag_open.'<span '.$current_class.' >'.$i.'</span>'.$this->cur_tag_close; 
  130.       }else if($i >= $pl && $i <= $pr) 
  131.       { 
  132.         $output .= $this->num_tag_open.'<a '.$anchor_class.' href="'.site_url($page_url.'/'.$i).'" rel="external nofollow" >'.$i.'</a>'.$this->num_tag_close; 
  133.       } 
  134.     } 
  135.     //下一页 
  136.     if($page_num < $pages) 
  137.     { 
  138.       $n = $page_num + 1; 
  139.       $output .= $this->next_tag_open.'<a '.$anchor_class.' href="'.site_url($page_url.'/'.$n).'" rel="external nofollow" rel="external nofollow" >下一页</a>'.$this->next_tag_close; 
  140.     } 
  141.     //末页 
  142.     if($page_num < $pages) 
  143.     { 
  144.       $output .= $this->last_tag_open.'<a '.$anchor_class.' href="'.site_url($page_url.'/'.$pages).'" rel="external nofollow" >末页</a>'.$this->last_tag_close; 
  145.     } 
  146.  
  147.     $output.=$this->full_tag_close; 
  148.     return $output; 
  149.   } 
  150. }

控制器里调用


  1. $config['page_url'] 
  2. = 'about/science'; 
  3. $config['page_size'] = $pagesize; 
  4. $config['rows_num'] = $num_rows; 
  5. $config['page_num'] = $page; 
  6. $this->load->library('Custom_pagination'); 
  7. $this->custom_pagination->init($config); 
  8. echo $this->custom_pagination->create_links();


  1. <?php 
  2. class page{ 
  3.    
  4.   public $page; //当前页 
  5.   public $pagenum; // 页数 
  6.   public $pagesize; // 每页显示条数 
  7.   public function __construct($count, $pagesize){ 
  8.     $this->pagenum = ceil($count/$pagesize); 
  9.     $this->pagesize = $pagesize; 
  10.     $this->page =(isset($_GET['p'])&&$_GET['p']>0) ? intval($_GET['p']) : 1; 
  11.   } 
  12.   /** 
  13.    * 获得 url 后面GET传递的参数 
  14.    */  
  15.   public function getUrl(){   
  16.     $url = 'index.php?'.http_build_query($_GET); 
  17.     $url = preg_replace('/[?,&]p=(\w)+/','',$url); 
  18.     $url .= (strpos($url,"?") === false) ? '?' : '&'; 
  19.     return $url; 
  20.   } 
  21.   /** 
  22.    * 获得分页HTML 
  23.    */ 
  24.   public function getPage(){ 
  25.     $url = $this->getUrl(); 
  26.     $start = $this->page-5; 
  27.     $start=$start>0 ? $start : 1;  
  28.     $end  = $start+9; 
  29.     $end = $end<$this->pagenum ? $end : $this->pagenum; 
  30.     $pagestr = ''; 
  31.     if($this->page>5){ 
  32.       $pagestr = "<a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=1".">首页</a> "; 
  33.     } 
  34.     if($this->page!=1){ 
  35.       $pagestr.= "<a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".($this->page-1).">上一页</a>"; 
  36.     } 
  37.      
  38.     for($i=$start;$i<=$end;$i++){ 
  39.       $pagestr.= "<a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".$i.">".$i."</a> ";            
  40.     } 
  41.     if($this->page!=$this->pagenum){ 
  42.       $pagestr.="<a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".($this->page+1).">下一页</a>"; 
  43.        
  44.     } 
  45.     if($this->page+5<$this->pagenum){ 
  46.       $pagestr.="<a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".$this->pagenum.">尾页</a> "; 
  47.     } 
  48.     return $pagestr;   
  49.   } 
  50.    
  51. } 
  52. // 测试代码 
  53. $page = new page(100,10); 
  54. $str=$page->getPage(); 
  55. echo $str; 
  56. ?>

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