php分页思路

<?phpclass page{ ???public $nowPage=1; ???public $perPage=10; ???public $showPage=10; ???public $totalPage; ???private $startPage=1; ???private $endPage; ???private $pageNum; ???private $url; ???private $query; ???private $html; ???private $defaultConfig=[ ???????‘prev‘=>false, ???????‘next‘=>false, ???????‘total‘=>false, ???????‘first‘=>false, ???????‘last‘=>false ???]; ???private $config; ???public function __construct($config=‘‘,$url=‘‘){ ???????$this->config=$config?$config:$this->defaultConfig; ???????$this->url=$url?$url:$_SERVER[‘PHP_SELF‘]; ???} ???public function show($nowPage,$perPage,$total){ ???????$this->perPage=$perPage; ???????$this->totalPage=intval(ceil($total/$perPage)); ???????$this->nowPage=$nowPage>$this->totalPage?$this->totalPage:$nowPage; ???????$this->initConfig(); ???????$this->createPageNum(); ???????$this->createHtml(); ???????return $this->html; ???} ???private function createPageNum(){ ???????$half=intval($this->showPage/2); ???????$this->startPage=max(1,$this->nowPage-$half); ???????$this->endPage=min($this->startPage+$this->showPage-1,$this->totalPage); ???????$this->startPage=max(1,$this->endPage-$this->showPage+1); ???????$this->pageNum=range($this->startPage, $this->endPage); ???} ???private function createUrl($page){ ???????$urlArr=$_SERVER[‘QUERY_STRING‘]; ???????parse_str($urlArr,$queryArr); ???????$queryArr[‘page‘]=$page<=1?1:$page; ???????$queryArr[‘page‘]=$queryArr[‘page‘]>=$this->totalPage?$this->totalPage:$queryArr[‘page‘]; ???????return $this->query=http_build_query($queryArr); ???} ???private function initConfig(){ ???????$configKey=array_keys($this->defaultConfig); ???????foreach ($this->config as $k => $v) ????????{ ???????????if(!in_array($k, $configKey)) unset($this->config[$k]); ???????} ???} ???private function createHtml(){ ???????$pageNum=$this->pageNum; ???????$html=‘‘; ???????foreach ($pageNum as $v){ ???????????if($v==$this->nowPage){ ???????????????$html.="<span style=‘margin:10px;display:inline-block;min-width:36px;text-align:center;line-height:36px;‘>{$this->nowPage}</span>"; ???????????}else{ ???????????????$query=$this->createUrl($v); ???????????????$url=$this->url.‘?‘.$query; ???????????????$html.="<a style=‘border:1px solid #e1e2e3;color:blue;text-decoration:none;margin:10px;display:inline-block;min-width:36px;text-align:center;line-height:36px;‘ href=‘{$url}‘>{$v}</a>"; ???????????} ???????} ???????if($this->config[‘prev‘]&&$this->nowPage>1){ ???????????$query=$this->createUrl($this->nowPage-1); ???????????$url=$this->url.‘?‘.$query; ???????????$html="<a style=‘border:1px solid #e1e2e3;color:blue;text-decoration:none;margin:10px;display:inline-block;min-width:75px;text-align:center;line-height:36px;‘ href=‘{$url}‘>上一页</a>".$html; ???????} ???????if($this->config[‘next‘]&&$this->nowPage<$this->totalPage){ ???????????$query=$this->createUrl($this->nowPage+1); ???????????$url=$this->url.‘?‘.$query; ???????????$html.="<a style=‘border:1px solid #e1e2e3;color:blue;text-decoration:none;margin:10px;display:inline-block;min-width:75px;text-align:center;line-height:36px;‘ href=‘{$url}‘>下一页</a>"; ???????} ???????if($this->config[‘first‘]&&$this->nowPage>1){ ???????????$query=$this->createUrl(1); ???????????$url=$this->url.‘?‘.$query; ???????????$html="<a style=‘border:1px solid #e1e2e3;color:blue;text-decoration:none;margin:10px;display:inline-block;min-width:75px;text-align:center;line-height:36px;‘ href=‘{$url}‘>首页</a>".$html; ???????} ???????if($this->config[‘last‘]&&$this->nowPage<$this->totalPage){ ???????????$query=$this->createUrl($this->totalPage); ???????????$url=$this->url.‘?‘.$query; ???????????$html.="<a style=‘border:1px solid #e1e2e3;color:blue;text-decoration:none;margin:10px;display:inline-block;min-width:75px;text-align:center;line-height:36px;‘ href=‘{$url}‘>尾页</a>"; ???????} ???????if($this->config[‘total‘]){ ???????????$html.="<span style=‘margin:10px;display:inline-block;min-width:100px;text-align:center;line-height:36px;‘>当前第{$this->nowPage}页，总{$this->totalPage}页</span>"; ???????} ???????$html="<div style=‘text-align:right;padding:10px 5px;‘>{$html}</div>"; ???????$this->html=$html; ???}}$page=new page([‘prev‘=>true,‘next‘=>true,‘total‘=>true,‘first‘=>true,‘last‘=>true]);$nowPage=isset($_GET[‘page‘])?$_GET[‘page‘]:1;$html=$page->show($nowPage,2,1000);echo $html;