php 分页类
<?php /* *本程序文件对分页程序进行了封装 * */ class Page_Link { var $page_max = 10; //一组页码的最大数 var $page_num = 10; //总页数 var $length = 20; //一页的数据条数 var $isNextPage = true; var $isFirstPage = false; function Calculation_Page_Num( $total ) { $this->page_num = ceil( $total / $this->length ); return $this->page_num; } function Calculation_Min_Max( $act_page = 1 ) { // 定义左右偏移量 $py_left = 0; $py_right = 0; // 定义左右边界 $bj_left = 0; $bj_right = 0; // 定义滚动区间边界 $gd_left = 0; $gd_right = 0; // 判断是否需要分组 if ( ( $this->page_num - $this->page_max ) <= 0 ) { // 不需要分组 $bj_left = 1; $bj_right = $this->page_num; } else { // 要进行分组 // 判断容量的奇偶 $tmp = $this->page_max % 2; if ( $tmp === 1 ) { // 奇数 $py_left = $py_right = ( $this->page_max - 1 ) / 2; } else { // 偶数 $py_left = $this->page_max / 2 - 1; $py_right = $this->page_max / 2; } // 计算滚动区间 $gd_left = 1 + $py_left; $gd_right = $this->page_num - $py_right; // 判断当前页是否落入了滚动区间 if ( $act_page >= $gd_left && $act_page <= $gd_right ) { // 区间内 $bj_left = $act_page - $py_left; $bj_right = $act_page + $py_right; } else { // 区间外 if ( ( $act_page - $py_left ) <= 1 ) { // 左侧固定区间 $bj_left = 1; $bj_right = $this->page_max; } else { $bj_left = $this->page_num - $this->page_max + 1; $bj_right = $this->page_num; } } } $res = array(); $res['min'] = $bj_left; $res['max'] = $bj_right; return $res; } // 主方法 function make_page( $total, $act_page, $url, $param ) { $page_num = $this->Calculation_Page_Num( $total ); $arr_min_max = $this->Calculation_Min_Max( $act_page ); if (!eregi("([?|&]$param=)", $url)) { $url = strpos($url,"?")===false?$url."?":$url."&"; $url = $url."$param=0"; } if ( $act_page > $page_num ) { $act_page = $page_num; } // 用正则把url改成正规的 $url = eregi_replace( $param . '=[0-9]+', $param . '=0', $url ); $res = array(); $d = 0; for( $i = $arr_min_max['min'];$i <= $arr_min_max['max'];$i++ ) { if ( $i == $act_page ) { $res[$d]['url'] = ''; $res[$d]['name'] = $i; $res[$d]['no'] = $i; } else { $res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url ); $res[$d]['name'] = $i; $res[$d]['no'] = $i; } $d++; } if ( $this->isNextPage ) { $res = $this->make_before_next_link( $res, $act_page, $url, $param ); } if ( $this->isFirstPage ) { $res = $this->make_first_end_link( $res, $act_page, $url, $param ); } return $res; } //// 带总页数 function make_page_with_total( $total, $act_page, $url, $param ) { $page_num = $this->Calculation_Page_Num( $total ); $arr_min_max = $this->Calculation_Min_Max( $act_page ); if (!eregi("([?|&]$param=)", $url)) { $url = strpos($url,"?")===false?$url."?":$url."&"; $url = $url."$param=0"; } if ( $act_page > $page_num ) { $act_page = $page_num; } // 用正则把url改成正规的 $url = eregi_replace( $param . '=[0-9]+', $param . '=0', $url ); $res = array(); $d = 0; for( $i = $arr_min_max['min'];$i <= $arr_min_max['max'];$i++ ) { if ( $i == $act_page ) { $res[$d]['url'] = ''; $res[$d]['name'] = $i; $res[$d]['no'] = $i; } else { $res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url ); $res[$d]['name'] = $i; $res[$d]['no'] = $i; } $d++; } if ( $this->isNextPage ) { $res = $this->make_before_next_link( $res, $act_page, $url, $param ); } if ( $this->isFirstPage ) { $res = $this->make_first_end_link( $res, $act_page, $url, $param ); } $total_num= ceil($total/$this->length); $result['total']=$total_num; $result['DATA']=$res; return $result; } // 附加上一页和下一页 function make_before_next_link( $arr, $act, $url, $param ) { $tmp = array(); $before = $act - 1; $next = $act + 1; if ( $before < 1 ) { $before = 1; $tmp[0]['url'] = ''; $tmp[0]['name'] = "上一页"; $tmp[0]['no'] = $before; } else { $tmp[0]['url'] = str_replace( $param . '=0', $param . '=' . $before, $url ); $tmp[0]['name'] = "上一页"; $tmp[0]['no'] = $before; } $counts = sizeof( $arr ); $tmp_count = sizeof( $tmp ); for( $i = 0;$i < $counts;$i++ ) { $tmp[$tmp_count]['url'] = $arr[$i]['url']; $tmp[$tmp_count]['name'] = $arr[$i]['name']; $tmp[$tmp_count]['no'] = $arr[$i]['no']; $tmp_count++; } if ( $next > $this->page_num ) { $next = $this->page_num; $tmp[$tmp_count]['url'] = ''; $tmp[$tmp_count]['name'] = "下一页"; $tmp[$tmp_count]['no'] = $next; } else { $tmp[$tmp_count]['url'] = str_replace( $param . '=0', $param . '=' . $next, $url ); $tmp[$tmp_count]['name'] = "下一页"; $tmp[$tmp_count]['no'] = $next; } return $tmp; } // 附加首页和尾页 function make_first_end_link( $arr, $act, $url, $param ) { $tmp = array(); $before = 1; $next = $this->page_num; if ( $act == 1 ) { $before = 1; $tmp[0]['url'] = ''; $tmp[0]['name'] = "首页"; $tmp[0]['no'] = $before; } else { $tmp[0]['url'] = str_replace( $param . '=0', $param . '=' . $before, $url ); $tmp[0]['name'] = "首页"; $tmp[0]['no'] = $before; } $counts = sizeof( $arr ); $tmp_count = sizeof( $tmp ); for( $i = 0;$i < $counts;$i++ ) { $tmp[$tmp_count]['url'] = $arr[$i]['url']; $tmp[$tmp_count]['name'] = $arr[$i]['name']; $tmp[$tmp_count]['no'] = $arr[$i]['no']; $tmp_count++; } if ( $act == $this->page_num ) { $tmp[$tmp_count]['url'] = ''; $tmp[$tmp_count]['name'] = "尾页"; $tmp[$tmp_count]['no'] = $next; } else { $tmp[$tmp_count]['url'] = str_replace( $param . '=0', $param . '=' . $next, $url ); $tmp[$tmp_count]['name'] = "尾页"; $tmp[$tmp_count]['no'] = $next; } return $tmp; } /** * 带上一页<，下一页>，省略号的分页 * @param int $total 记录总条数 * @param int $act_page 当前页码 * @param string $url url * @param int $maxpageicon 最大显示页码数 * @param int $style 上一页，下一页显示样式 * @param string $param url参数 */ function make_page_with_points( $total,$act_page,$url,$maxpageicon,$style,$param ) { $page_num = $this->Calculation_Page_Num( $total ); //总页数 $arr_min_max = $this->Calculation_Min_Max( $act_page ); //最大页，最小页 if($total==0) { return ""; } if( $act_page > $page_num ) { $act_page = $page_num+1; $page_num = $page_num+1; } switch ($style){ case 1: $name_before = '前一页'; $name_next = '后一页'; break; case 2: $name_before = '<'; $name_next = '>'; break; case 3: $name_before = '<<'; $name_next = '>>'; break; default: $name_before = '上一页'; $name_next = '下一页'; } if (!eregi("([?|&]$param=)", $url)) { $url = strpos($url,"?")===false?$url."?":$url."&"; $url = $url."$param=0"; } // 用正则把url改成正规的 $url = eregi_replace( $param . '=[0-9]+', $param . '=0', $url ); $res = array(); $no_before = $act_page-1; $no_next = $act_page+1; //总页数如果小于等于初始化最大呈现页数 if ($page_num<= ($maxpageicon + 1)) { //如果当前页数是首页 上一页无效 if ($act_page == 1) { $res[0]['url'] = ''; $res[0]['name'] = $name_before; $res[0]['no'] = $no_before; } else //上一页有效 { $res[0]['url'] = str_replace( $param . '=0', $param . '=' .($act_page - 1), $url ); $res[0]['name'] = $name_before; $res[0]['no'] = $no_before; } //循环添加页码 $d = 1; for ($i = 1; $i <= $page_num; $i++) { if ($i != $act_page) { $res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url ); $res[$d]['name'] = $i; $res[$d]['no'] = $i; } else //当前页，页码 { $res[$d]['url'] = ''; $res[$d]['name'] = $i; $res[$d]['no'] = $i; $res[$d]['attr'] = 'current'; } $d++; } $last_d = count($res); //判断尾页 if($act_page == $page_num) //下一页无效 { $res[$last_d]['url'] = ''; $res[$last_d]['name'] = $name_next; $res[$last_d]['no'] = $no_next; } else { $res[$last_d]['url'] = str_replace( $param . '=0', $param . '=' .($act_page + 1), $url ); $res[$last_d]['name'] = $name_next; $res[$last_d]['no'] = $no_next; } }else if ($page_num > ($maxpageicon + 1))//如果总页数满足添加省略号 { if ($act_page <= $maxpageicon) //如果当前页小于等于初始化数目 { //如果当前页数是首页 上一页无效 if ($act_page == 1) { $res[0]['url'] = ''; $res[0]['name'] = $name_before; $res[0]['no'] = $no_before; } else //上一页有效 { $res[0]['url'] = str_replace( $param . '=0', $param . '=' .($act_page - 1), $url ); $res[0]['name'] = $name_before; $res[0]['no'] = $no_before; } //循环添加页码 $d = 1; for ($i = 1; $i <= $maxpageicon; $i++) { if ($i != $act_page) { $res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url ); $res[$d]['name'] = $i; $res[$d]['no'] = $i; } else //当前页，页码 { $res[$d]['url'] = ''; $res[$d]['name'] = $i; $res[$d]['no'] = $i; $res[$d]['attr'] = 'current'; } $d++; } $last_d = count($res); //添加省略号 $res[$last_d]['url'] = ''; $res[$last_d]['name'] = '...'; $res[$last_d]['no'] = ''; //总页数 $res[$last_d+1]['url'] = str_replace( $param . '=0', $param . '=' . $page_num, $url ); $res[$last_d+1]['name'] = $page_num; $res[$last_d+1]['no'] = $page_num; //下一页 $res[$last_d+1]['url'] = str_replace( $param . '=0', $param . '=' . ($act_page + 1), $url ); $res[$last_d+1]['name'] = $name_next; $res[$last_d+1]['no'] = $no_next; }else//如果当前页大于最大显示页面 { if ($act_page > ($page_num - $maxpageicon))//满足后几页 { //上一页 $res[0]['url'] = str_replace( $param . '=0', $param . '=' .($act_page - 1), $url ); $res[0]['name'] = $name_before; $res[0]['no'] = $no_before; //第一页 $res[1]['url'] = str_replace( $param . '=0', $param . '=1', $url ); $res[1]['name'] = 1; $res[1]['no'] = 1; //省略号 $res[2]['url'] = ''; $res[2]['name'] = '...'; $res[2]['no'] = ''; $d = 3; for ($i = ($page_num - $maxpageicon + 1); $i <= $page_num; $i++) { if ($i != $act_page) { $res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url ); $res[$d]['name'] = $i; $res[$d]['no'] = $i; } else //当前页，页码 { $res[$d]['url'] = ''; $res[$d]['name'] = $i; $res[$d]['no'] = $i; $res[$d]['attr'] = 'current'; } $d++; } $last_d = count($res); //判断尾页 if($act_page == $page_num) //下一页无效 { $res[$last_d]['url'] = ''; $res[$last_d]['name'] = $name_next; $res[$last_d]['no'] = $no_next; } else { $res[$last_d]['url'] = str_replace( $param . '=0', $param . '=' .($act_page + 1), $url ); $res[$last_d]['name'] = $name_next; $res[$last_d]['no'] = $no_next; } }else//满足处在中间 { //上一页 $res[0]['url'] = str_replace( $param . '=0', $param . '=' .($act_page - 1), $url ); $res[0]['name'] = $name_before; $res[0]['no'] = $no_before; //第一页 $res[1]['url'] = str_replace( $param . '=0', $param . '=1', $url ); $res[1]['name'] = 1; $res[1]['no'] = 1; //省略号 $res[2]['url'] = ''; $res[2]['name'] = '...'; $res[2]['no'] = ''; for ($i = ($act_page - ($maxpageicon - 2) / 2); $i <= floor($act_page+($maxpageicon - 2) / 2); $i++) { $i = ceil($i); if ($i != $act_page) { $res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url ); $res[$d]['name'] = $i; $res[$d]['no'] = $i; } else //当前页，页码 { $res[$d]['url'] = ''; $res[$d]['name'] = $i; $res[$d]['no'] = $i; $res[$d]['attr'] = 'current'; } $d++; } $last_d = count($res); //加省略号 $res[$last_d]['url'] = ''; $res[$last_d]['name'] = '...'; $res[$last_d]['no'] = ''; //当前页 $res[$last_d+1]['url'] = str_replace( $param . '=0', $param . '=' . $page_num, $url ); $res[$last_d+1]['name'] = $page_num; $res[$last_d+1]['no'] = $page_num; //下一页 $res[$last_d+2]['url'] = str_replace( $param . '=0', $param . '=' . ($act_page + 1), $url ); $res[$last_d+2]['name'] = $name_next; $res[$last_d+2]['no'] = $no_next; //exit; } } } return $res; } } ?>
使用方法 ：
$page_no = $_GET['page_no'] ? $_GET['page_no'] : 1; $count = 20; $start = ($page_no-1)*$count; $end = $start + $count; $page = new Page_Link(); $page->length = $count; $page->isFirstPage = true; $url = $_SERVER['SCRIPT_NAME']."?&a=".$a; $page_arr = $page->make_page($total_num,$page_no,$url,"page_no");
支持多种样式：
