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【PHP】分页类

作者:Goarulinsman / 发布于2015/7/9/ 538


	<?php
	/**
	* Created by PhpStorm.
	* User: zerodeng
	* Date: 15-5-12
	* Time: 下午4:09
	*/
	
	class pagination {
	
	 private $total;
	 private $per_page;
	 private $link;
	 private $page;
	 private $page_offset;
	 private static $instance;
	
	 public function __construct(){
	 $this->per_page = 40;
	 }
	
	 public static function get_instance(){
	 if(!isset(self::$instance)){
	 self::$instance = new self;
	 }
	 return self::$instance;
	 }
	
	 public function set_total($num){
	 $this->total = $num;
	 }
	
	 public function set_link($link=''){
	 if($link){
	 $this->link = $link.'?page=';
	 }else{
	 $this->link = $_SERVER['SERVER_NAME'].$_SERVER['PHP_SELF'].'?page=';
	 }
	 }
	
	 public function set_page(){
	 if(!empty($_GET['page'])){
	 $this->page = $_GET['page'];
	 }else{
	 $this->page = 1;
	 }
	 }
	
	 public function set_page_offset(){
	 if(isset($this->page)){
	 $this->page_offset = ($this->page-1)*$this->per_page;
	 }
	 }
	
	 public function page_limit($mode=''){
	 $this->set_page();
	 $this->set_page_offset();
	 if($mode == 'str'){
	 $limit = $this->page_offset.','.$this->per_page;
	 return $limit;
	 }
	 $limit = array($this->page_offset,$this->per_page);
	 return $limit;
	 }
	
	 public function show_page($page_num=5){
	 if(!isset($this->page)){
	 $this->set_page();
	 }
	 $first_page = 1;
	 $last_page = ceil($this->total/$this->per_page);
	 if(!isset($this->link)){
	 $this->set_link();
	 }
	 $html = '';
	 $html .= '<div id="show_page">总共'.$this->total.'条记录 '.$this->page.'/'.$last_page;
	 if($this->page != $first_page){
	 $html .= '<a href="http://'.$this->link.$first_page.'">首页</a>&nbsp';
	 }
	 if($page_num>=$last_page){
	 for($i = 1;$i<=$last_page;$i++){
	 $html .= '|&nbsp<a href="http://'.$this->link.$i.'">'.$i.'</a>&nbsp';
	 }
	 }else{
	 $page_offset = $this->page+$page_num;
	 if($page_offset<$last_page){
	 for($i=$this->page;$i<=($this->page+$page_num);$i++){
	 $html .= '|&nbsp<a href="http://'.$this->link.$i.'">'.$i.'</a>&nbsp';
	 }
	 }else{
	 for($i=$this->page;$i<=$last_page;$i++){
	 $html .= '|&nbsp<a href="http://'.$this->link.$i.'">'.$i.'</a>&nbsp';
	 }
	 }
	
	 }
	 if($this->page != $last_page){
	 $html .= '<a href="http://'.$this->link.$last_page.'">最后一页</a>&nbsp';
	 }
	 $html .= '</div>';
	 return $html;
	 }
	
	}

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