php通用分页类
<?phpinterface ILink{ public function parse($page,$param);}?>?
<?phprequire 'ILink.php';class LinkAdapter implements ILink{ /** * @param unknown_type $page * @param unknown_type $param */ public function parse($page, $param) { $temp="共{$page->getAllPage()}页,第{$page->getCurrentPage()}页 "; $links=$this->getLinkString($param); if($page->hasPrevious())$temp.="<a href="%24links=%22.(%24page->getCurrentPage()-1).%22">上一页</a> ";else{$temp.="上一页 ";} for($i=$page->getCurrentPage();$igetAllPage()&&$igetPerRecords();$i++) { $temp.="<a href="%24links=%24i">{$i}</a> "; } if($page->hasNext())$temp.="<a href="%24links=%22.(%24page->getCurrentPage()+1).%22">下一页</a> ";else{$temp.="下一页 ";} return $temp; } public function getLinkString($param) { $str=""; $attr=$_GET; unset($attr[$param]); if($attr) { foreach($attr as $key=>$val) { if($str=="") { $str.="?$key=$val"; } else { $str.="&$key=$val"; } } $str.="&$param"; } else { $str.="?$param"; } return $str; }}?>??
<?phpclass Page { private $allPage;#总页数 private $allRecords;#总记录数 private $perRecords;#单页记录数 private $currentPage=1;#当前页面 /** * @return the $allPage */ public function getAllPage() { return $this->allPage; } /** * @return the $allRecords */ public function getAllRecords() { return $this->allRecords; } /** * @return the $perRecords */ public function getPerRecords() { return $this->perRecords; } /** * @return the $currentPage */ public function getCurrentPage() { return $this->currentPage; } /** * @param $allPage the $allPage to set */ public function setAllPage($allPage) { $this->allPage = ($allPage%$this->perRecords == 0)?($allPage/$this->perRecords):($allPage/$this->perRecords+1); $this->allPage=intval($this->allPage); } /** * @param $allRecords the $allRecords to set */ public function setAllRecords($allRecords) { $this->allRecords = $allRecords; } /** * @param $perRecords the $perRecords to set */ public function setPerRecords($perRecords) { $this->perRecords = $perRecords; } /** * @param $currentPage the $currentPage to set */ public function setCurrentPage($currentPage) { if ($currentPage currentPage = 1; else if ($currentPage > $this->allPage) $this->currentPage =$this->allPage; else $this->currentPage=$currentPage; } public function hasNext() { return $this->currentPageallPage; } public function hasPrevious() { return $this->currentPage>1; } public function getEndIndex() { return ((($this->currentPage-1)*$this->perRecords)+$this->perRecords)>$this->allRecords?((($this->currentPage-1)*$this->perRecords)+$this->perRecords)-$this->allRecords:$this->perRecords; } public function getStartIndex() { return ($this->currentPage-1)*$this->perRecords; }}?>?
<?phprequire 'Page.php';require'LinkAdapter.php';class Pager { private $list=array(); private $page;#分页对象 private $param;#页面请求参数 public function __construct($list) { $this->list=$list; $this->page=new Page(); } /** * * @param unknown_type $rows 显示的数据量 * @param unknown_type $current 当前页 */ public function init($rows=5,$current) { $this->page->setAllRecords(count($this->list)); $this->page->setPerRecords($rows); $this->page->setAllPage(count($this->list)); $this->page->setCurrentPage($current); $this->list=array_slice($this->list,$this->page->getStartIndex(),$this->page->getEndIndex()); } /** * 获取分页变量 */ public function getVar() { return $this->list; } /** * @return the $param */ public function getParam() { return $this->param; } /** * @param $param the $param to set */ public function setParam($param) { $this->param = $param; } /** * 加载插件信息,获取生成的链接,装饰器模式 * @param unknown_type $link */ public function getLink($link=null) { if(!empty($link)||!(($link instanceof ILink)))$link=new LinkAdapter(); return $link->parse($this->page,$this->param); }}?>?
<?php include'lib/Pager.php'; $target=array(); for($i=0;$i<=100;$i++){$target[]=$i;} $page=new Pager($target); $page->setParam("page"); $page->init(30,$_REQUEST['page']); $list=$page->getVar(); foreach($list as $val): echo $val.'<br>'; endforeach; echo $page->getLink();?>?下载
