CI框架分页类用法是什么，具体例子是怎样
发布时间：2023-04-17 14:16:21 所属栏目：PHP教程 来源：
导读：本篇内容介绍了“CI框架分页类用法是什么，具体实例是怎样”的有关知识，在实际项目的操作过程或是学习过程中，不少人都会遇到这样的问题，接下来就让小编带大家学习一下如何处理这些情况吧！希望大家仔细
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本篇内容介绍了“CI框架分页类用法是什么，具体实例是怎样”的有关知识，在实际项目的操作过程或是学习过程中，不少人都会遇到这样的问题，接下来就让小编带大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！ /** * * 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; ?> （编辑：聊城站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
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