/*********************************************************************************
* InitPHP 2.0 国产PHP开发框架 扩展类库-分页类
*-------------------------------------------------------------------------------
* 版权所有: CopyRight By initphp.com
* 您可以自由使用该源码，但是在使用过程中，请保留作者信息。尊重他人劳动成果就是尊重自己
*-------------------------------------------------------------------------------
* $Author:zhuli
* $Dtime:2011-10-09
***********************************************************************************/
class pagerInit {
private $show_num = 9; //分页中显示多少个
private $conf = array(
'first_last'=> 1, //首页-尾页 0-关闭 1-开启
'back_next' => 1, //上一页-下一页 0-关闭 1-开启
'total_num' => 1, //是否显示总页数 0-关闭 1-开启
'page_num' => 1, //翻页数 0-关闭 1-开启
'select' => 1 //下拉列表选择 0-关闭 1-开启
);
private $style_config = '<style type="text/css">
.InitPHP_pages {font:12px/1.6em Helvetica, Arial, sans-serif;overflow:hidden; text-align:center; font-family:Verdana;margin-bottom:5px; }
.InitPHP_pages a, .pages{ margin:0 1px; padding:1px 6px; border:1px solid #E4E4E4; text-decoration:none!important; }
.InitPHP_pages a:hover { border-color:#369; }
.InitPHP_pages strong { margin:0 1px; padding:2px 6px; border-color:#369; background:#369; color:#FFF; text-decoration:none!important; }
.InitPHP_pages .back { padding:4px 6px 1px 20px!important; padding:4px 6px 2 20px; font-family:simsun; }
.InitPHP_pages .next { padding:4px 20px 1px 6px!important; padding:4px 20px 2 6px; font-family:simsun; }
.InitPHP_pages .first { padding:4px 6px 1px 4px!important; padding:4px 6px 2 4px; font-family:simsun; }
.InitPHP_pages .last { padding:4px 4px 1px 6px!important; padding:4px 4px 2 6px; font-family:simsun; }
</style>';
/**
* 分页-分页入口
* @param int $count 总共多少数据
* @param int $prepage 每页显示多少条
* @param int $url URL
* @return string
*/
public function pager($count, $prepage, $url) {
$count = (int) $count;
$prepage = (int) $prepage;
$page_num = ceil($count / $prepage); //总共多少页
$page = (int) $_GET['page'];
$page = ($page > $page_num) ? $page_num : ($page = ($page < 1) ? 1 : $page);
$url = (strpos($url, '?') === false) ? $url . '?' : $url;
return $this->pager_html($page_num, $url, $page);
}
/**
* 分页-获取分页HTML显示
* @param int $page_num 页数
* @param string $url URL
* @param int $page 当前页
* @return string
*/
private function pager_html($page_num, $url, $page) {
list($start, $end) = $this->get_satrt_and_end($page, $page_num);
list($back, $next) = $this->get_pager_next_back_html($url, $page, $page_num);
list($first, $last) = $this->get_first_last_html($page_num, $url);
$html = $this->style_config . "<div class='InitPHP_pages'>";
$html .= $back;
$html .= $first;
$html .= $this->get_pager_num_html($start, $end, $url, $page);
$html .= $last;
$html .= $next;
$html .= $this->get_total_num_html($page_num);
$html .= $this->get_select_html($page_num, $url, $page);
$html .= '</div>';
return $html;
}
/**
* 分页-获取分页数字的列表
* @param int $start 开始数
* @param int $end 结束数
* @param string $url URL地址
* @param int $page 当前页
* @return string
*/
private function get_pager_num_html($start, $end, $url, $page) {
if ($this->conf['page_num'] == 0) return ''; //是否开启
$html = '';
for ($i=$start; $i<=$end; $i++) {
if ($i == $page) {
$html .= "<strong>{$i}</strong>";
} else {
$html .= "<a href='{$url}&page={$i}'>{$i}</a>";
}
}
return $html;
}
/**
* 分页-分页总页数显示
* @param int $page_num 页数
* @return string
*/
private function get_total_num_html($page_num) {
if ($this->conf['total_num'] == 0) return ''; //是否开启
return " 共{$page_num}页";
}
/**
* 分页-分页首页和尾页显示
* @param int $page_num 页数
* @param string $url URL地址
* @return string
*/
private function get_first_last_html($page_num, $url) {
if ($this->conf['first_last'] == 0) return array('', ''); //是否开启
$first = "<a href='{$url}&page=1' class='first'>首页</a>";
$last = "<a href='{$url}&page={$page_num}' class='last'>尾页</a>";
return array($first, $last);
}
/**
* 分页-获取分页上一页-下一页HTML
* @param string $url URL地址
* @param int $page 当前页
* @param int $page_num 页数
* @return string
*/
private function get_pager_next_back_html($url, $page, $page_num) {
if ($this->conf['back_next'] == 0) return array('', ''); //是否开启
$next_page = $page + 1;
$next = "<a href='{$url}&page={$next_page}' class='next'>下一条</a>";
if ($page == $page_num) $next = '';
$back_page = $page - 1;
$back = "<a href='{$url}&page={$back_page}' class='back'>上一条</a>";
if ($page == 1) $back = '';
return array($back, $next);
}
/**
* 分页-Select选择器
* @param int $page_num 页数
* @param string $url URL地址
* @param int $page 当前页
* @return string
*/
private function get_select_html($page_num, $url, $page) {
if ($this->conf['select'] == 0) return '';
$html = ' <select name="select" onchange="javascript:window.location.href=this.options[this.selectedIndex].value">';
for ($i=1; $i<=$page_num; $i++){
if ($page == $i) {
$selected = ' selected';
} else {
$selected = '';
}
$html.="<option value='{$url}&page={$i}' {$selected}>{$i}</option>";
}
$html .= '</select>';
return $html;
}
/**
* 分页-获取分页显示数字
* @param int $page 当前页
* @param int $page_num 页数
* @return array(start, end)
*/
private function get_satrt_and_end($page, $page_num) {
$temp = floor($this->show_num / 2);
if ($page_num < $this->show_num) return array(1, $page_num);
if ($page <= $temp) {
$start = 1;
$end = $this->show_num;
} elseif (($page_num - $temp) < $page) {
$start = $page_num - $this->show_num + 1;
$end = $page_num;
} else {
$start = $page - $temp;
$end = $page - $temp + $this->show_num - 1;
}
return array($start, $end);
}
}