CI框架简单分页类用法示例
这篇文章主要介绍了CI框架简单分页类用法,结合实例形式分析了CI框架简单分页类基本定义与使用方法,需要的朋友可以参考下
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 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | /** * * 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
1 2 3 4 5 6 7 8 | $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(); |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | <?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 ; ?> |