<?php
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
* 分页类
* 使用方式:
* $page = new Page();
* $page->init(1000, 20);
* $page->setNotActiveTemplate('<span> {a} </span>');
* $page->setActiveTemplate('{a}');
* echo $page->show();
*
*
* @author 风居住的地方
*/
class Page {
/**
* 总条数
*/
private $total;
/**
* 每页大小
*/
private $pageSize;
/**
* 总页数
*/
private $pageNum;
/**
* 当前页
*/
private $page;
/**
* 地址
*/
private $uri;
/**
* 分页变量
*/
private $pageParam;
/**
* LIMIT XX,XX
*/
private $limit;
/**
* 数字分页显示
*/
private $listnum = 8;
/**
* 分页显示模板
* 可用变量参数
* {total} 总数据条数
* {pagesize} 每页显示条数
* {start} 本页开始条数
* {end} 本页结束条数
* {pagenum} 共有多少页
* {frist} 首页
* {pre} 上一页
* {next} 下一页
* {last} 尾页
* {list} 数字分页
* {goto} 跳转按钮
*/
private $template = '<div><span>共有{total}条数据</span><span>每页显示{pagesize}条数据</span>,<span>本页{start}-{end}条数据</span><span>共有{pagenum}页</span><ul>{frist}{pre}{list}{next}{last}{goto}</ul></div>';
/**
* 当前选中的分页链接模板
*/
private $activeTemplate = '<li class="active"><a href="javascript:;">{text}</a></li>';
/**
* 未选中的分页链接模板
*/
private $notActiveTemplate = '<li><a href="{url}">{text}</a></li>';
/**
* 显示文本设置
*/
private $config = array('frist' => '首页', 'pre' => '上一页', 'next' => '下一页', 'last' => '尾页');
/**
* 初始化
* @param type $total 总条数
* @param type $pageSize 每页大小
* @param type $param url附加参数
* @param type $pageParam 分页变量
*/
public function init($total, $pageSize, $param = '', $pageParam = 'page') {
$this->total = intval($total);
$this->pageSize = intval($pageSize);
$this->pageParam = $pageParam;
$this->uri = $this->geturi($param);
$this->pageNum = ceil($this->total / $this->pageSize);
$this->page = $this->setPage();
$this->limit = $this->setlimit();
}
/**
* 设置分页模板
* @param type $template 模板配置
*/
public function setTemplate($template) {
$this->template = $template;
}
/**
* 设置选中分页模板
* @param type $activeTemplate 模板配置
*/
public function setActiveTemplate($activeTemplate) {
$this->activeTemplate = $activeTemplate;
}
/**
* 设置未选中分页模板
* @param type $notActiveTemplate 模板配置
*/
public function setNotActiveTemplate($notActiveTemplate) {
$this->notActiveTemplate = $notActiveTemplate;
}
/**
* 返回分页
* @return type
*/
public function show() {
return str_ireplace(array(
'{total}',
'{pagesize}',
'{start}',
'{end}',
'{pagenum}',
'{frist}',
'{pre}',
'{next}',
'{last}',
'{list}',
'{goto}',
), array(
$this->total,
$this->setPageSize(),
$this->star(),
$this->end(),
$this->pageNum,
$this->frist(),
$this->prev(),
$this->next(),
$this->last(),
$this->pagelist(),
$this->gopage(),
), $this->template);
}
/**
* 获取limit起始数
* @return type
*/
public function getOffset() {
return ($this->page - 1) * $this->pageSize;
}
/**
* 设置LIMIT
* @return type
*/
private function setlimit() {
return "limit " . ($this->page - 1) * $this->pageSize . ",{$this->pageSize}";
}
/**
* 获取limit
* @param type $args
* @return type
*/
public function __get($args) {
if ($args == "limit") {
return $this->limit;
} else {
return null;
}
}
/**
* 初始化当前页
* @return int
*/
private function setPage() {
if (!empty($_GET[$this->pageParam])) {
if ($_GET[$this->pageParam] > 0) {
if ($_GET[$this->pageParam] > $this->pageNum)
return $this->pageNum;
else
return $_GET[$this->pageParam];
}
}
return 1;
}
/**
* 初始化url
* @param type $param
* @return string
*/
private function geturi($param) {
$url = $_SERVER['REQUEST_URI'] . (strpos($_SERVER['REQUEST_URI'], "?") ? "" : "?") . $param;
$parse = parse_url($url);
if (isset($parse["query"])) {
parse_str($parse["query"], $params);
unset($params["page"]);
$url = $parse["path"] . "?" . http_build_query($params);
return $url;
} else {
return $url;
}
}
/**
* 本页开始条数
* @return int
*/
private function star() {
if ($this->total == 0) {
return 0;
} else {
return ($this->page - 1) * $this->pageSize + 1;
}
}
/**
* 本页结束条数
* @return type
*/
private function end() {
return min($this->page * $this->pageSize, $this->total);
}
/**
* 设置当前页大小
* @return type
*/
private function setPageSize() {
return $this->end() - $this->star() + 1;
}
/**
* 首页
* @return type
*/
private function frist() {
$html = '';
if ($this->page == 1) {
$html .= $this->replace("{$this->uri}&page=1", $this->config['frist'], true);
} else {
$html .= $this->replace("{$this->uri}&page=1", $this->config['frist'], false);
}
return $html;
}
/**
* 上一页
* @return type
*/
private function prev() {
$html = '';
if ($this->page > 1) {
$html .= $this->replace($this->uri.'&page='.($this->page - 1), $this->config['pre'], false);
} else {
$html .= $this->replace($this->uri.'&page='.($this->page - 1), $this->config['pre'], true);
}
return $html;
}
/**
* 分页数字列表
* @return type
*/
private function pagelist() {
$linkpage = "";
$lastlist = floor($this->listnum / 2);
for ($i = $lastlist; $i >= 1; $i--) {
$page = $this->page - $i;
if ($page >= 1) {
$linkpage .= $this->replace("{$this->uri}&page={$page}", $page, false);
} else {
continue;
}
}
$linkpage .= $this->replace("{$this->uri}&page={$this->page}", $this->page, true);
for ($i = 1; $i <= $lastlist; $i++) {
$page = $this->page + $i;
if ($page <= $this->pageNum) {
$linkpage .= $this->replace("{$this->uri}&page={$page}", $page, false);
} else {
break;
}
}
return $linkpage;
}
/**
* 下一页
* @return type
*/
private function next() {
$html = '';
if ($this->page < $this->pageNum) {
$html .= $this->replace($this->uri.'&page='.($this->page + 1), $this->config['next'], false);
} else {
$html .= $this->replace($this->uri.'&page='.($this->page + 1), $this->config['next'], true);
}
return $html;
}
/**
* 最后一页
* @return type
*/
private function last() {
$html = '';
if ($this->page == $this->pageNum) {
$html .= $this->replace($this->uri.'&page='.($this->pageNum), $this->config['last'], true);
} else {
$html .= $this->replace($this->uri.'&page='.($this->pageNum), $this->config['last'], false);
}
return $html;
}
/**
* 跳转按钮
* @return string
*/
private function gopage() {
$html = '';
$html.=' <input type="text" value="' . $this->page . '" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>' . $this->pageNum . ')?' . $this->pageNum . ':this.value;location=\'' . $this->uri . '&page=\'+page+\'\'}" style="width:25px;"/><input type="button" onclick="javascript:var page=(this.previousSibling.value>' . $this->pageNum . ')?' . $this->pageNum . ':this.previousSibling.value;location=\'' . $this->uri . '&page=\'+page+\'\'" value="GO"/>';
return $html;
}
/**
* 模板替换
* @param type $replace 替换内容
* @param type $result 条件
* @return type
*/
private function replace($url, $text, $result = true) {
$template = ($result ? $this->activeTemplate : $this->notActiveTemplate);
$html = str_replace('{url}', $url, $template);
$html = str_replace('{text}', $text, $html);
return $html;
}
}
