非常好用的Zend Framework分页类
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在这里和大家分享一个非常好用的 Zend Framework 分页类
具体效果可见本站的分页效果， CSS样式可根据个人设计感进行更变。
这里我会举例演示如何使用该类， 如下:
IndexController.php， 在 Action 中写入如下代码:
代码如下:
protected $_curPage = 1; //默认第一页
const PERPAGENUM = 4; //每页显示条目数
public function indexAction()
{
// $this->_blogModel 已实例化 blog Model
// $rows -> 获得到所展示数据的总条目数
$rows = $this->_blogModel->getTotalRows();
if($pageNum = $this->getRequest()->getParam('page')) {
//如果有值传入，覆盖初始的第一页
$this->_curPage = $pageNum;
}
//把数据表中的数据传到前端
$this->view->blogInfo = $this->_blogModel->getBlogInfo(
self::PERPAGENUM, ($this->_curPage-1)*self::PERPAGENUM
);
//实例化分页类，并传到前端
$this->view->pagebar = $this->displayPageBar($rows);
}
private function displayPageBar($totalRows)
{
$Pager = new Zend_Pagination($totalRows,self::PERPAGENUM);
return $Pager->getNavigation();
}
models/Blog.php，写入如下代码:
代码如下:
public function getBlogInfo($perPageNum = NULL, $limit = NULL)
{
return $this->fetchAll('1 = 1', 'blog_id desc', $perPageNum, $limit)
->toArray();
}
public function getTotalRows($where = '1=1')
{
return $this->fetchAll($where)->count();
}
index.phtml, 写入如下代码:
代码如下:
<div class="page">
<!--?php echo $this--->pagebar; ?>
</div>
到这里，就可以看见效果了， 如想追求更好的页面效果， 请根据个人喜好修改分页类，这里就不作详细示例
代码如下:
class Zend_Pagination
{
private $_navigationItemCount = 6; //导航栏显示导航总页数
private $_pageSize = null; //每页项目数
private $_align = "right"; //导航栏显示位置
private $_itemCount = null; //总项目数
private $_pageCount = null; //总页数
private $_currentPage = null; //当前页
private $_front = null; //前端控制器
private $_PageParaName = "page"; //页面参数名称
private $_firstPageString = "|<<"; //导航栏中第一页显示的字符
private $_nextPageString = ">>"; //导航栏中前一页显示的字符
private $_previousPageString = "<<"; //导航栏中后一页显示的字符
private $_lastPageString = ">>|"; //导航栏中最后一页显示的字符
private $_splitString = " | "; //页数字间的间隔符
public function __construct($itemCount, $pageSize)
{
if (!is_numeric($itemCount) || (!is_numeric($pageSize))) {
throw new Exception("Pagination Error:not Number");
}
$this->_itemCount = $itemCount;
$this->_pageSize = $pageSize;
$this->_front = Zend_Controller_Front::getInstance();
$this->_pageCount = ceil($itemCount/$pageSize); //总页数
$page = $this->_front->getRequest()->getParam($this->_PageParaName);
if (empty($page) || (!is_numeric($page))) {
//为空或不是数字，设置当前页为1
$this->_currentPage = 1;
} else {
if ($page < 1) {
$page = 1;
}
if ($page > $this->_pageCount) {
$page = $this->_pageCount;
}
$this->_currentPage = $page;
}
}
public function getCurrentPage()
{
return $this->_currentPage;
}
public function getNavigation()
{
$navigation = '<div style="text-align:'.$this->_align.';" class="pagecss">';
//当前页处于第几栏分页
$pageCote = ceil($this->_currentPage / ($this->_navigationItemCount - 1)) - 1;
//总分页栏
$pageCoteCount = ceil($this->_pageCount / ($this->_navigationItemCount - 1));
//分页栏中起始页
$pageStart = $pageCote * ($this->_navigationItemCount -1) + 1;
//分页栏中终止页
$pageEnd = $pageStart + $this->_navigationItemCount - 1;
if($this->_pageCount < $pageEnd) {
$pageEnd = $this->_pageCount;
}
$navigation .= "总共： {$this->_itemCount} 条 共 {$this->_pageCount} 页\n ";
if($pageCote > 0) { //首页导航
$navigation .= '<a href="'.$this->createHref(1)
." \"="">$this->_firstPageString</a> ";
}
if($this->_currentPage != 1) { //上一页导航
$navigation .= '<a href="'.$this->createHref($this->_currentPage-1);
$navigation .= " \"="">$this->_previousPageString</a> ";
}else{
$navigation .= $this->_previousPageString . ' ';
}
while ($pageStart <= $pageEnd) //构造数字导航区
{
if ($pageStart == $this->_currentPage) {
$navigation .= "<b>$pageStart</b>" . $this->_splitString;
} else {
$navigation .= '<a href="'.$this->createHref($pageStart)
." \"="">$pageStart</a>"
. $this->_splitString;
}
$pageStart++;
}
if($this->_currentPage != $this->_pageCount) { //下一页导航
$navigation .= ' <a href="'
. $this->createHref($this->_currentPage+1)
. " \"="">$this->_nextPageString</a> ";
}else{
$navigation .= $this->_nextPageString;
}
if ($pageCote < $pageCoteCount-1) { //未页导航
$navigation .= '<a href="'
. $this->createHref($this->_pageCount)
. " \"="">$this->_lastPageString</a> ";
}
$navigation .= ' 到 <select onchange="window.location=\' '
. $this->createHref()
. '\'+this.options[this.selectedIndex].value;">';
for ($i=1;$i<=$this->_pageCount;$i++){
if ($this->getCurrentPage()==$i){
$selected = "selected";
} else {
$selected = "";
}
$navigation .= '<option value=" . $i . " '="" .="" $selected="">'
. $i
. '</option>';
}
$navigation .= '</select>';
$navigation .= " 页</div>";
return $navigation;
}
public function getNavigationItemCount()
{
return $this->_navigationItemCount;
}
public function setNavigationItemCoun($navigationCount)
{
if(is_numeric($navigationCount)) {
$this->_navigationItemCount = $navigationCount;
}
}
public function setFirstPageString($firstPageString)
{
$this->_firstPageString = $firstPageString;
}
public function setPreviousPageString($previousPageString)
{
$this->_previousPageString = $previousPageString;
}
public function setNextPageString($nextPageString)
{
$this->_nextPageString = $nextPageString;
}
public function setLastPageString($lastPageString)
{
$this->_lastPageString = $lastPageString;
}
public function setAlign($align)
{
$align = strtolower($align);
if ($align == "center") {
$this->_align = "center";
} elseif ($align == "right") {
$this->_align = "right";
} else {
$this->_align = "left";
}
}
public function setPageParamName($pageParamName)
{
$this->_PageParaName = $pageParamName;
}
public function getPageParamName()
{
return $this->_PageParaName;
}
private function createHref($targetPage = null)
{
$params = $this->_front->getRequest()->getParams();
$module = $params["module"];
$controller = $params["controller"];
$action = $params["action"];
$targetUrl = $this->_front->getBaseUrl()
. "/$module/$controller/$action";
foreach ($params as $key => $value)
{
if($key != "controller" && $key != "module"
&& $key != "action" && $key != $this->_PageParaName) {
$targetUrl .= "/$key/$value";
}
}
if (isset($targetPage)) { //指定目标页
$targetUrl .= "/$this->_PageParaName/$targetPage";
} else {
$targetUrl .= "/$this->_PageParaName/";
}
return $targetUrl;
}
}
这里再简单回顾下 Mysql 中的 limit offset
假设数据库表 blog 存在 13 条数据。
语句1：select * from blog limit 9, 4
语句2：select * from blog limit 4 offset 9
//语句1和2均返回表 blog 的第 10、11、12、13 行
//语句1中的 9 表示从表的第十行开始， 返回 4 行
//语句2中的 4 表示返回 4 行，offset 9 表示从表的第十行开始
如下语句显示分页效果:
语句3：select * from blog limit ($this->_curPage - 1)* self::PERPAGENUM, self::PERPAGENUM;
语句4：select * from blog limit self::PERPAGENUM offset ($this->_curPage - 1) * self::PERPAGENUM;
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