一个PHP分页类的代码

时间：2018-12-30分类：PHP作者：编程之家

下面看这一段代码：
PHP
<div class="codetitle"><a style="CURSOR: pointer" data="13433" class="copybut" id="copybut13433" onclick="doCopy('code13433')"> 代码如下:

<div class="codebody" id="code13433">
<?
/
filename: ext_page.class.PHP
@package:PHPbean
@author :feifengxlq<feifengxlq#gmail.com>http://www.phpobject.net/
@copyright :copyright 2006 feifengxlq
@license:version 2.0
@create:2006-5-31
@modify:2006-6-1
@modify:feifengxlq 2006-11-4
description: 分页类，四种分页模式
2.0增加功能：支持自定义风格，自定义样式，同时支持 PHP4和PHP5,
to see detail,please visit http://www.PHPobject.net/blog/read.PHP?
example:
模式四种分页模式：
require_once('../libs/classes/page.class.PHP');
$page=new page(array('total'=>1000,'perpage'=>20));
echo 'mode:1
'.$page->show();
echo 'mode:2
'.$page->show(2);
echo 'mode:3
'.$page->show(3);
echo 'mode:4
'.$page->show(4);
开启AJAX：
$ajaxpage=new page(array('total'=>1000,'perpage'=>20,'ajax'=>'ajax_page','page_name'=>'test'));
echo 'mode:1
'.$ajaxpage->show();
采用继承自定义分页显示模式：
demo:http://www.PHPobject.net/blog
/
class page
{
/
config,public
/
var $page_name="PB_page";//page标签，用来控制url页
var $next_page='>';//下一页
var $pre_page='<';//上一页
var $first_page='First';//首页
var $last_page='Last';//尾页
var $pre_bar='<<';//上一分页条
var $next_bar='>>';//下一分页条
var $format_left='[';
var $format_right=']';
var $is_ajax=false;//是否支持AJAX分页模式 /
private

*/
var $pagebarnum=10;//控制记录条的个数。
var $totalpage=0;//总页数
var $ajax_action_name='';//AJAX动作名
var $Nowindex=1;//当前页
var $url="";//URL地址头
var $offset=0; /*
constructor构造函数

@param array $array['total'],$array['perpage'],$array['Nowindex'],$array['url'],$array['ajax']
/
function page($array)
{
if(is_array($array)){
if(!array_key_exists('total',$array))$this->error(FUNCTION,'need a param of total');
$total=intval($array['total']);
$perpage=(array_key_exists('perpage',$array))?intval($array['perpage']):10;
$Nowindex=(array_key_exists('Nowindex',$array))?intval($array['Nowindex']):'';
$url=(array_key_exists('url',$array))?$array['url']:'';
}else{
$total=$array;
$perpage=10;
$Nowindex='';
$url='';
}
if((!is_int($total))||($total<0))$this->error(FUNCTION,$total.' is not a positive integer!');
if((!is_int($perpage))||($perpage<=0))$this->error(FUNCTION,$perpage.' is not a positive integer!');
if(!empty($array['page_name']))$this->set('page_name',$array['page_name']);//设置pagename
$this->setNowindex($Nowindex);//设置当前页
$this->_set_url($url);//设置链接地址
$this->totalpage=ceil($total/$perpage);
$this->offset=($this->Nowindex-1)$perpage;
if(!empty($array['ajax']))$this->open_ajax($array['ajax']);//打开AJAX模式
}
/
设定类中指定变量名的值，如果改变量不属于这个类，将throw一个exception

@param string $var
@param string $value
*/
function set($var,$value)
{
if(in_array($var,get_object_vars($this)))
$this->$var=$value;
else {
$this->error(FUNCTION,$var." does not belong to PB_Page!");
} }
/
打开倒AJAX模式

@param string $action 默认ajax触发的动作。
/
function open_ajax($action)
{
$this->is_ajax=true;
$this->ajax_action_name=$action;
}
/
获取显示"下一页"的代码

@param string $style
@return string
*/
function next_page($style='')
{
if($this->Nowindex<$this->totalpage){
return $this->_get_link($this->_get_url($this->Nowindex+1),$this->next_page,$style);
}
return '<span class=".$style.">'.$this->next_page.'';
} /
获取显示“上一页”的代码

@param string $style
@return string
*/
function pre_page($style='')
{
if($this->Nowindex>1){
return $this->_get_link($this->_get_url($this->Nowindex-1),$this->pre_page,$style);
}
return '<span class=".$style.">'.$this->pre_page.'';
} /
获取显示“首页”的代码

@return string
/
function first_page($style='')
{
if($this->Nowindex==1){
return '<span class=".$style.">'.$this->first_page.'';
}
return $this->_get_link($this->_get_url(1),$this->first_page,$style);
} /
获取显示“尾页”的代码

@return string
/
function last_page($style='')
{
if($this->Nowindex==$this->totalpage){
return '<span class=".$style.">'.$this->last_page.'';
}
return $this->_get_link($this->_get_url($this->totalpage),$this->last_page,$style);
} function Nowbar($style='',$Nowindex_style='')
{
$plus=ceil($this->pagebarnum/2);
if($this->pagebarnum-$plus+$this->Nowindex>$this->totalpage)$plus=($this->pagebarnum-$this->totalpage+$this->Nowindex);
$begin=$this->Nowindex-$plus+1;
$begin=($begin>=1)?$begin:1;
$return='';
for($i=$begin;$i<$begin+$this->pagebarnum;$i++)
{
if($i<=$this->totalpage){
if($i!=$this->Nowindex)
$return.=$this->_get_text($this->_get_link($this->_get_url($i),$i,$style));
else
$return.=$this->_get_text('<span class=".$Nowindex_style.">'.$i.'');
}else{
break;
}
$return.="\n";
}
unset($begin);
return $return;
}
/
获取显示跳转按钮的代码

@return string
/
function select()
{
$return='<select name="PB_Page_Select">';
for($i=1;$i<=$this->totalpage;$i++)
{
if($i==$this->Nowindex){
$return.='';
}else{
$return.='<option value="'.$i.'">'.$i.'';
}
}
unset($i);
$return.='';
return $return;
} /
获取 MysqL 语句中limit需要的值

@return string
/
function offset()
{
return $this->offset;
} /*
控制分页显示风格

@param int $mode
@return string
/
function show($mode=1)
{
switch ($mode)
{
case '1':
$this->next_page='下一页';
$this->pre_page='上一页';
return $this->pre_page().$this->Nowbar().$this->next_page().'第'.$this->select().'页';
break;
case '2':
$this->next_page='下一页';
$this->pre_page='上一页';
$this->first_page='首页';
$this->last_page='尾页';
return $this->first_page().$this->pre_page().'[第'.$this->Nowindex.'页]'.$this->next_page().$this->last_page().'第'.$this->select().'页';
break;
case '3':
$this->next_page='下一页';
$this->pre_page='上一页';
$this->first_page='首页';
$this->last_page='尾页';
return $this->first_page().$this->pre_page().$this->next_page().$this->last_page();
break;
case '4':
$this->next_page='下一页';
$this->pre_page='上一页';
return $this->pre_page().$this->Nowbar().$this->next_page();
break;
case '5':
return $this->pre_bar().$this->pre_page().$this->Nowbar().$this->next_page().$this->next_bar();
break;
} }
/----------------private function (私有方法)-----------------------------------------------------------/
/
设置url头地址
@param: String $url
@return boolean
/
function _set_url($url="")
{
if(!empty($url)){
//手动设置
$this->url=$url.((stristr($url,'?'))?'&':'?').$this->page_name."=";
}else{
//自动获取
if(empty($_SERVER['QUERY_STRING'])){
//不存在QUERY_STRING时
$this->url=$_SERVER['REQUEST_URI']."?".$this->page_name."=";
}else{
//
if(stristr($_SERVER['QUERY_STRING'],$this->page_name.'=')){
//地址存在页面参数
$this->url=str_replace($this->page_name.'='.$this->Nowindex,'',$_SERVER['REQUEST_URI']);
$last=$this->url[strlen($this->url)-1];
if($last=='?'||$last=='&'){
$this->url.=$this->page_name."=";
}else{
$this->url.='&'.$this->page_name."=";
}
}else{
//
$this->url=$_SERVER['REQUEST_URI'].'&'.$this->page_name.'=';
}//end if
}//end if
}//end if
} /
设置当前页面

*/
function setNowindex($Nowindex)
{
if(empty($Nowindex)){
//系统获取 if(isset($_GET[$this->page_name])){
$this->Nowindex=intval($_GET[$this->page_name]);
}
}else{
//手动设置
$this->Nowindex=intval($Nowindex);
}
} /*
为指定的页面返回地址值

@param int $pageno
@return string $url
/
function _get_url($pageno=1)
{
return $this->url.$pageno;
} /
获取分页显示文字，比如说默认情况下_get_text('<a href="">1')将返回[<a href="">1]

@param String $str
@return string $url
*/
function _get_text($str)
{
return $this->format_left.$str.$this->format_right;
} /
获取链接地址
/
function _get_link($url,$text,$style=''){
$style=(empty($style))?'':'class="'.$style.'"';
if($this->is_ajax){
//如果是使用AJAX模式
return '<a '.$style.' href="javascript:'.$this->ajax_action_name.'(\''.$url.'\')">'.$text.'';
}else{
return '<a '.$style.' href="'.$url.'">'.$text.'';
}
}
/
出错处理方式
/
function error($function,$errormsg)
{
die('Error in file '.FILE.',Function '.$function.'() :'.$errormsg);
}
}
$page=new page(array('total'=>1000,'perpage'=>20));
echo 'mode:1
'.$page->show();
echo 'mode:2
'.$page->show(2);
echo 'mode:3
'.$page->show(3);
echo 'mode:4
'.$page->show(4);
echo '开始AJAX模式:';
$ajaxpage=new page(array('total'=>1000,'page_name'=>'test'));
echo 'mode:1
'.$ajaxpage->show();
?>

其实，我现在的工作是做电话录音卡这种硬件的电话录音系统软件的，对于一些代码还是很敏感，不只是学习PHP，学习任何一门编程语言都需要多读，多写，多想！

原文地址：https://www.jb51.cc/php/27969.html

分页类