page.php

a short sketch about linux syntex lines.

<?php
class Page {
	public $total;
	public $maxpage;
	public $nextpage;
	public $page;
	public function set($total, $maxpage=null){
		$this->total = (int)$total;
		$this->page = isset($_GET['page']) ? intval($_GET['page']) : 1;	//当前页码e
		$this->nextpage = 7;
		$this->config = $GLOBALS['config'];
		if (is_null($maxpage)){
			$this->maxpage = $this->config['maxpage'];
		}else{
			$this->maxpage = $maxpage;
		}
	}
	/*后台分页*/
	public function PrintPage(){
		$array = array_merge($_POST,$_GET);
		$array['page'] = null;
		$array['submit'] = null;
		$this->url = null;
		if ($array['keyword']){
			$array['keyword'] = urlencode(urldecode($array['keyword']));
		}else{
			$array['keyword'] = null;
		}
		//print_r($array);
		$this->url = INSTALLDIR.'?'.http_build_query($array);
		unset($array);
		$this->countpage = ceil($this->total / $this->maxpage) ;	//总页数
		if ($this->countpage == 0){
			$this->countpage = 1;
		}
		if ($this->page > $this->countpage){
			$this->page = $this->countpage;
		}
		$body = '<div class="BlockDof"><div class="pagings"><div class="paging"><a class="total">'.$this->total.'</a><a class="pages">'.$this->page.'/'.$this->countpage.'</a>';
		if ($this->page>1){
			$body.= '<a class="pages" href="'.$this->url.'&page=1">首页</a><a class="pages" href="'.$this->url.'&page='.($this->page-1).'">上一页</a>';
		}
		if ($this->countpage < $this->nextpage){
			$this->nextpage = $this->countpage;
		}
		if ($this->page >= $this->nextpage){
			$min = floor($this->nextpage /2);
			$end = $this->page+$min;
			$start = $this->page - floor($this->nextpage /2);
		}else{
			$start = 1;
			$end = $this->nextpage;
		}
		if ($end > $this->countpage){
			$end = $this->countpage;
		}
		while($start <= $end){
			if ($this->page == $start){
				$body.= '<a class="pagenow"  href="'.$this->url.'&page='.$start.'">'.$start.'</a>';
			}else{
				$body.= '<a class="page" href="'.$this->url.'&page='.$start.'">'.$start.'</a>';
			}
			$start++;
		}
		if ($this->page < $this->countpage){
			$body.= '<a class="pages" href="'.$this->url.'&page='.($this->page+1).'">下一页</a>';
			$body.= '<a class="pages" href="'.$this->url.'&page='.($this->countpage).'">尾页</a>';
		}
		$body.= '<a class="input"><input type="text" name="paging_num" value="'.$this->page.'" size="3" style="text-align:center;"> <input type="button" class="btn" value="GO" onclick="javascript:location.href=\''.$this->url.'&page=\'+this.parentNode.firstChild.value;"></a></div></div>';
		return $body;
	}
	public function __set($key, $value){
		$this->$key = $value;
	}
	public function limit(){
		$this->pagesize = ($this->page-1) * $this->maxpage;
		return ' LIMIT '.$this->pagesize.','.$this->maxpage;
	}
	/*
	前端分页
	*/
	public function PrintBody(){
		$this->url = null;
		$array = array_merge($_POST,$_GET);
		$array['page'] = null;
		$array['submit'] = null;
		$this->url = http_build_query($array);
		if ($this->config['rewrite'] == 'default' || strtolower($_GET['action']) != 'category'){
			$this->url = $this->config['basedir'].'index.php?'.$this->url.'&page={page}';
		}else{
			$this->url = $this->config['basedir'].str_replace('{id}', $_GET['id'], $this->config['crewrite']);
		}
		$this->countpage = ceil($this->total / $this->maxpage) ;	//总页数
		if ($this->countpage == 0){
			$this->countpage = 1;
		}
		if ($this->page > $this->countpage){
			$this->page = $this->countpage;
		}
		$indexpage = str_replace('{page}', 1, $this->url);
		if ($this->page>1){
			$firstpage = '<li class="home"><a href="'.$indexpage.'">首&nbsp;页</a></li>';
			$pageup= '<li class="previous"><a href="'.str_replace('{page}', ($this->page-1), $this->url).'">上一页</a></li>';
		}
		if ($this->page<$this->countpage){
			$pagedown = '<li class="next"><a href="'.str_replace('{page}', ($this->page+1), $this->url).'">下一页</a></li>';
		}
		if ($this->page <= ($this->countpage-10)){
			$pagedown.= '<li class="next10"><a href="'.str_replace('{page}', ($this->page+10), $this->url).'" title="下十页">下十页</a></li>';
		}
		if ($this->page != $this->countpage){
			$pageover = '<li class="lastly"><a href="'.str_replace('{page}', $this->countpage, $this->url).'">尾&nbsp;页</a></li>';
		}
		$body = '<div class="page"><ul><li class="home" ><a href="#" style="width:100px">共'.$this->total.'部/'.$this->countpage.'页</a></li>'.$firstpage.$pageup;
		if ($this->countpage<$this->nextpage)
		{
			$endpage = $this->countpage;
			$start = $endpage-$this->nextpage;
		}
		if ($this->page >= $this->nextpage){
			$endpage = $this->page + ceil($this->nextpage/2);
			$start = $this->page - ceil($this->nextpage/2);
		}else{
			$endpage = $this->nextpage;
			$start =1;
		}
		if ($endpage > $this->countpage)
		{
			$endpage = $this->countpage;
		}
		if ($start<1) $start = 1;
		//echo $start.'='. $endpage;
		for($i = $start; $i<=$endpage; $i++){
			if ($this->page == $i){
				$body.= '<li class="active">'.$i.'</li>';
			}else{
				$body.= '<li><a href="'.str_replace('{page}', $i, $this->url).'">'.$i.'</a></li>';
			}
		}
		unset($i,$endpage, $cutpage);
		$body.= $pagedown.$pageover.'</ul></div>';
		return $body;
	}
}?>