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363 lines
13 KiB
363 lines
13 KiB
<?php
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namespace libraries;
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/**
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* 分页类，提供四种显示样式，和ajax支持
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*/
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class Page {
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public $pageName = "page"; //page标签，用来控制url页。比如说xxx.php?page=2中的page
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public $pageSeparator = '='; //页面参数分隔符
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public $pageParameter = '&'; //页面参数连接符
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public $pageSuffix = '.html'; //页面后缀
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public $nextPage = '下一页'; //下一页
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public $prePage = '上一页'; //上一页
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public $firstPage = '首页'; //首页
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public $lastPage = '尾页'; //尾页
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public $preBar = '<<'; //上一分页条
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public $nextBar = '>>'; //下一分页条
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public $isAjax = false; //是否支持AJAX分页模式
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public $pageBarNum = 10; //控制记录条的个数。
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public $totalPage = 0; //总页数
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public $ajaxActionName = ''; //AJAX动作名
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public $nowIndex = 0; //当前页
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public $url = ""; //url地址头
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public $requestUri = "";
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/**
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* 构造函数
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* @param type $array
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*/
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public function __construct($array = array()) {
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if (isset($array['pageName']))
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$this->set('pageName', $array['pageName']); //设置pagename
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if (isset($array['ajax']) && !empty($array['ajax']))
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$this->openAjax($array['ajax']); //打开AJAX模式
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}
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/**
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* 处理分页参数
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* @param type $url
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* @param type $total
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* @param type $perPage
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* @param type $pageBarNum
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*/
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public function doPage($url, $total, $perPage, $pageBarNum) {
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$this->totalPage = ceil($total / $perPage); //计算总页数
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$this->pageBarNum = $pageBarNum;
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//获取到当前页,同时避免两次执行getCurPage()方法
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$this->nowIndex = $this->nowIndex == 0 ? $this->getCurPage($url) : $this->nowIndex;
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}
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/**
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* 设定类中指定变量名的值，如果改变量不属于这个类，将返回false
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* @param string $var
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* @param string $value
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*/
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public function set($var, $value) {
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if (in_array($var, get_object_vars($this))) {
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$this->$var = $value;
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return true;
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} else {
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return false;
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}
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}
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/**
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* 打开AJAX模式
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* @param string $action 默认ajax触发的动作。
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*/
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public function openAjax($action) {
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$this->isAjax = true;
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$this->ajaxActionName = $action;
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}
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/**
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* 获取显示"下一页"的代码
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* @param string $style
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* @return string
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*/
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public function nextPage($style = 'nextPage') {
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if ($this->nowIndex < $this->totalPage) {
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return $this->_getLink($this->_getUrl($this->nowIndex + 1), $this->nextPage, $style);
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}
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return '';
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}
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/**
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* 获取显示“上一页”的代码
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* @param string $style
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* @return string
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*/
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public function prePage($style = 'prePage') {
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if ($this->nowIndex > 1) {
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return $this->_getLink($this->_getUrl($this->nowIndex - 1), $this->prePage, $style);
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}
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return '';
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}
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/**
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* 获取显示“首页”的代码
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* @return string
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*/
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public function firstPage($style = 'firstPage') {
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if ($this->nowIndex == 1) {
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return '';
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}
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return $this->_getLink($this->_getUrl(1), $this->firstPage, $style);
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}
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/**
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* 获取显示“尾页”的代码
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* @return string
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*/
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public function lastPage($style = 'lastPage') {
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if ($this->nowIndex == $this->totalPage) {
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return '';
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}
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return $this->_getLink($this->_getUrl($this->totalPage), $this->lastPage, $style);
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}
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public function nowBar($style = 'pages', $nowIndex_style = 'current') {
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$plus = ceil($this->pageBarNum / 2);
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if ($this->pageBarNum - $plus + $this->nowIndex > $this->totalPage)
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$plus = ($this->pageBarNum - $this->totalPage + $this->nowIndex);
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$begin = $this->nowIndex - $plus + 1;
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$begin = ($begin >= 1) ? $begin : 1;
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$return = '';
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for ($i = $begin; $i < $begin + $this->pageBarNum; $i++) {
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if ($i <= $this->totalPage) {
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if ($i != $this->nowIndex)
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$return.=$this->_getText($this->_getLink($this->_getUrl($i), $i, $style));
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else
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$return.=$this->_getText('<span class="' . $nowIndex_style . '">' . $i . '</span>');
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}
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else {
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break;
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}
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$return.=" ";
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}
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return $return;
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}
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/**
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* 获取显示跳转按钮的代码
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* @return string
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*/
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public function select() {
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if ($this->totalPage > 1) {
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$return = '<select onChange="window.location=this.options[this.selectedIndex].value">';
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for ($i = 1; $i <= $this->totalPage; $i++) {
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if ($i == $this->nowIndex) {
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$return.='<option value="' . $this->_getUrl($i) . '" selected>' . $i . '</option>';
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} else {
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$return.='<option value="' . $this->_getUrl($i) . '">' . $i . '</option>';
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}
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}
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$return.='</select>';
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return $return;
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}
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}
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/**
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* 控制分页显示风格（你可以增加相应的风格）
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$url，基准网址，若为空，将会自动获取，不建议设置为空
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$total，信息总条数
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$perpage，每页显示行数
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$pagebarnum，分页栏每页显示的页数
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$mode，显示风格，参数可为整数1，2，3，4任意一个
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*/
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public function show($url = "", $total = 0, $perPage = 10, $pageBarNum = 10, $mode = 1) {
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$this->doPage($url, $total, $perPage, $pageBarNum);
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//翻页小于1的 不显示页码
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if ($this->totalPage < 1)
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return "";
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switch ($mode) {
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case 1:
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//$this->firstPage() . $this->prePage() . $this->nowBar() . $this->nextPage() . $this->lastPage();
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return $pager = array('page_first' => $this->firstPage(), 'page_prev' => $this->prePage(), 'page_next' => $this->nextPage(), 'page_last' => $this->lastPage(), 'page_number' => $this->showselect(), 'page' => $this->nowIndex, 'page_count' => $this->totalPage , 'count'=>$total);
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// $GLOBALS['smarty']->assign('pager', $pager);
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break;
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case 2:
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return $this->firstPage() . $this->prePage() . '[第' . $this->nowIndex . '页]' . $this->nextPage() . $this->lastPage() . '第' . $this->select() . '页';
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break;
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case 3:
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return $this->firstPage() . $this->prePage() . $this->nextPage() . $this->lastPage();
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break;
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case 4:
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return $this->prePage() . $this->nowBar() . $this->nextPage();
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break;
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case 5:
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return $this->prePage() . $this->nowBar() . $this->nextPage() . $this->select();
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break;
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default:break;
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}
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}
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/**
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* 显示的下拉页
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*/
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public function showselect() {
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$_pagenum = $this->pageBarNum; // 显示的页码
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$_offset = 2; // 当前页偏移值
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$_from = $_to = 0; // 开始页, 结束页
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if ($_pagenum > $this->totalPage) {
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$_from = 1;
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$_to = $this->totalPage;
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} else {
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$_from = $this->nowIndex - $_offset;
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$_to = $_from + $_pagenum - 1;
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if ($_from < 1) {
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$_to = $this->nowIndex + 1 - $_from;
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$_from = 1;
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if ($_to - $_from < $_pagenum) {
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$_to = $_pagenum;
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}
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} elseif ($_to > $this->totalPage) {
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$_from = $this->totalPage - $_pagenum + 1;
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$_to = $this->totalPage;
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}
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}
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$page_number = array();
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for ($i = $_from; $i <= $_to; ++$i) {
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$page_number[$i] = $this->_getUrl($i);
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}
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return $page_number;
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}
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/**
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获取当前页
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* @param: String $url
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* @return int
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*/
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public function getCurPage($url = "") {
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$this->_setUrl($url);
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$nowIndex = 1;
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if (isset($_GET[$this->pageName]) && intval($_GET[$this->pageName]) > 0)
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return intval($_GET[$this->pageName]);
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$pattern = str_replace('\{page\}', '(\d{1,})', preg_quote($this->url, '/'));
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if (preg_match('/' . $pattern . '/i', $this->requestUri, $matches)) {
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if (isset($matches[1]) && $matches[1] > 0)
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return $matches[1];
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}
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return $nowIndex;
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}
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//文章内容分页
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public function contentPage($content, $separator = "[page]", $url = "", $pageBarNum = 10, $mode = 1) {
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$content_array = explode($separator, $content);
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unset($content);
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$total = count($content_array); //计算总行数
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$this->nowIndex = $this->getCurPage($url);
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$index = $this->nowIndex - 1;
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$content = isset($content_array[$index]) ? $content_array[$index] : ""; //获取当前内容
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unset($content_array);
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if ($total > 1)
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$page = $this->show($url, $total, $perPage = 1, $pageBarNum, $mode); //获取分页栏
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else
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$page = "";
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return array('content' => $content, 'page' => $page);
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}
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// private function (私有方法)
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/**
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* 获取REQUEST_URI
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* @return type
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*/
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private function _requestUri($url) {
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if (isset($url)) {
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$uri = $url;
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} else {
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if (isset($_SERVER['argv'])) {
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$uri = $_SERVER['PHP_SELF'] . '?' . $_SERVER['argv'][0];
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} else {
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$uri = $_SERVER['PHP_SELF'] . '?' . $_SERVER['QUERY_STRING'];
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}
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}
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return 'http://' . $_SERVER['HTTP_HOST'] . $uri;
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}
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/**
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* 设置URL
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* @param type $url
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*/
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private function _setUrl($url = "") {
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$this->requestUri = $this->_requestUri($url);
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if (!empty($url) && preg_match('/\{page\}/', $url)) {
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$this->url = $url;
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} else {
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$page_str = '&' . $this->pageName . '=';
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if (($url = preg_replace('/' . preg_quote($page_str, '/') . '(\d{1,})/', $page_str . '{page}', $this->requestUri)) == $this->requestUri) {
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if (($url = str_replace($this->pageSuffix, $page_str . '{page}' . $this->pageSuffix, $this->requestUri)) == $this->requestUri) {
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$uri_arr = explode('?', $this->requestUri, 2);
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//处理网址中不带操作方法名
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$str1 = rtrim($uri_arr[0], '/');
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if (($pos = @strrpos($url, $_GET['_action'])) > 0) {
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$str1 = substr($str1, 0, $pos);
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}
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$str1 = rtrim($str1, '/') . '/' . $_GET['_action'];
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$str1 = rtrim($str1, '/');
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$str2 = "";
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if (isset($uri_arr[1])) {
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$str2 = '?' . $uri_arr[1];
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}
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$url = $str1 . $str2 . $page_str . '{page}';
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}
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}
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$this->url = $url;
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}
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}
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/**
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* 为指定的页面返回地址值
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* @param int $pageNum
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* @return string $url
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*/
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private function _getUrl($pageNum = 1) {
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$url = $this->url;
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if ($pageNum > 1) {
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$url = str_replace('{page}', $pageNum, $this->url);
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} else {
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$url = str_replace($this->pageSeparator . '{page}', '', $this->url);
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$url = str_replace($this->pageParameter . $this->pageName, '', $url);
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}
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return $url;
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}
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/**
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* 获取分页显示文字，比如说默认情况下_getText('<a href="">1</a>')将返回[<a href="">1</a>]
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* @param String $str
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* @return string $url
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*/
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function _getText($str) {
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return $str;
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}
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/**
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* 获取链接地址
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* @param type $url
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* @param type $text
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* @param type $style
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* @return type
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*/
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function _getLink($url, $text, $style = '') {
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$style = empty($style) ? '' : 'class="' . $style . '"';
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if ($this->isAjax) {
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//如果是使用AJAX模式
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return '<a ' . $style . ' href="javascript:' . $this->ajaxActionName . '(\'' . $url . '\')">' . $text . '</a>';
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} else {
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// return '<a ' . $style . ' href="' . $url . '">' . $text . '</a>';
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return $url;
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}
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}
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}
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