huahuibao/common/components/page.php

<?php
namespace common\components;

/**
 * @author 高洛峰
 * @modify sofashi
 */
class page {
	public $total;    //数据表中总记录数
	public $listRows; //每页显示行数
	public $limit;    //SQL语句使用limit从名
	public $uri;      //url地址
	public $pageNum;  //页数
	public $config		=array("prev"=>'上页', "next"=>'下页', "first"=>'<i class="fa-angle-double-left"></i>', "last"=>'<i class="fa-angle-double-right"></i>');//在分页信息中显示内容，可以自己设置
	public $listNum	=10; //默认分页列表显示的个数
	
	/**
	 * 构造方法，可以设置分页类的属性
	 * @param	int	$total		计算分页的总记录数
	 * * @param	int	$page		第几页
	 * @param	int	$listRows	可选的，默认每页需要显示的记录数
	 * @param	string	$pa		可选的，为向目标页面传递参数
	 */
	public function __construct($total,$page, $listRows=25, $pa=""){
		$this->total		= $total;
		$this->listRows		= $listRows;
		$this->uri			= $this->getUri($pa);
		$page				= !empty($page) ? $page : 1;
		if($total > 0) {
			if(preg_match('/\D/', $page) ){
				$this->page	= 1;
			}else{
				$this->page	= $page;
			}
		}else{
			$this->page		= 0;
		}
		$this->pageNum		= ceil($this->total/$this->listRows);
		$this->limit		= $this->setLimit();
	}

	/**
	 * 用于设置显示分页的信息，可以连贯操作
	 * @param	string	$param	是数组config的下标
	 * @param	string	$value	用于设置config下标对应的元素值
	 * @return	object		返回本对象自己$this
	 */
	function set($param, $value){
		if(array_key_exists($param, $this->config)){
			$this->config[$param]=$value;
		}
		return $this;
	}

	public function setLimit(){
		if($this->page > 0)
			return ($this->page-1)*$this->listRows.", {$this->listRows}";
		else
			return 0;
	}

	public function getUri($param){
		$url = $_SERVER['REQUEST_URI'] . (strpos($_SERVER['REQUEST_URI'], "?") ? "" : "?") . $param;
		$parse = parse_url($url);
		if (isset($parse["query"])) {
			parse_str($parse["query"], $params);
			unset($params["page"]);
			$url = $parse["path"] . "?" . http_build_query($params);
			return $url;
		} else {
			return $url;
		}
	}

	public function __get($args){
		if($args=="limit")
			return $this->limit;
		else
			return null;
	}

	public function start(){
		if($this->total==0)
			return 0;
		else
			return ($this->page-1)*$this->listRows+1;
	}

	public function end(){
		return min($this->page*$this->listRows,$this->total);
	}

	public function firstprev(){
		if($this->page > 1) {
			$str	="<li><a href='{$this->uri}page=1'>{$this->config["first"]}</a></li>";
			$str	.="<li><a href='{$this->uri}page=".($this->page-1)."'>{$this->config["prev"]}</a></li>";
			return $str;
		}else{
			$str	="<li class='disabled'><a href='javascript:void(0)'>{$this->config["first"]}</a></li>";
			$str	.="<li class='disabled'><a href='javascript:void(0)'>{$this->config["prev"]}</a></li>";
			return $str;
		}
	}
	public function pageList(){
		$linkPage			= "";
		$inum				= 2;
		for($i=$inum; $i>=1; $i--){
			$page			= $this->page-$i;
			if($page>=1)
				$linkPage	.="<li><a href='{$this->uri}&page={$page}'>{$page}</a></li>";
		}
		if($this->pageNum > 1)
			$linkPage		.='<li class="active"><a href="javascript:void(0)">'.$this->page.'</a></li>';
		for($i=1; $i<=$inum; $i++){
			$page			= $this->page+$i;
			if($page<=$this->pageNum)
				$linkPage	.= "<li><a href='{$this->uri}&page={$page}'>{$page}</a></li>";
			else
				break;
		}
		return $linkPage;
	}

	public function nextlast(){
		if($this->page != $this->pageNum) {
			$str	="<li><a href='{$this->uri}page=".($this->page+1)."'>{$this->config["next"]}</a></li>";
			$str	.="<li><a href='{$this->uri}page=".($this->pageNum)."'>{$this->config["last"]}</a></li>";
			return $str;
		}else{
			$str	="<li class='disabled'><a href='javascript:void(0)'>{$this->config["next"]}</a></li>";
			$str	.="<li class='disabled'><a href='javascript:void(0)'>{$this->config["last"]}</a></li>";
			return $str;
		}
	}

	/**
	 * 按指定的格式输出分页
	 */
	function fpage(){
		if($this->total <= $this->listRows){
			return;
		}
		$fpage		= '<ul class="pagination">';
		$fpage		.= $this->firstprev();
		$fpage		.= $this->pageList();
		$fpage		.= $this->nextlast();
		$fpage		.= '</ul>';
		return $fpage;
	}

}