Method Analysis of PHP Paging Display with PHP General Paging Class
- 2021-10-11 17:43:19
- OfStack
This paper describes the method of PHP paging display with examples. Share it for your reference, as follows:
<?php
header("content-type:text/html;charset=utf-8");
$currentpage = 1;
if(isset($_GET['page']))
$currentpage = $_GET['page'];
// Connect to a database
$link = mysql_connect("localhost","root","") or die(' Connection failed ');
mysql_select_db('myschool');
mysql_query('set names utf8');
$sql ="SELECT count(*) as 'count' from student";// Query the record's sql Statement
$result = mysql_query($sql);
$arr = mysql_fetch_array($result);
$count = $arr['count'];
$pagesize = 3;
$pages = ceil($count/$pagesize);// How many pages are there
$prepage = $currentpage -1;
if($prepage<=0)
$prepage=1;
$nextpage = $currentpage+1;
if($nextpage >= $pages){
$nextpage = $pages;
}
$start =($currentpage-1) * $pagesize;// Starting position
$sql = "SELECT * from student limit $start,$pagesize";
echo $sql;
// $sql = "select * from student";
$result = mysql_query($sql);
?>
<!-- html Part -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<table border="1">
<tr>
<td> Student number </td>
<td> Name </td>
<td> Gender </td>
<td> Age </td>
</tr>
<?php while($arr=mysql_fetch_array($result)){ ?>
<td><?php echo $arr['number']; ?></td>
<td><?php echo $arr['name']; ?></td>
<td><?php echo $arr['sex']; ?></td>
<td><?php echo $arr['age']; ?></td>
</tr>
<?php } ?>
</table>
<a href="<?php echo $_SERVER['PHP_SELF'].'?page='.$prepage; ?>" rel="external nofollow" > Upper 1 Page </a> <a href="<?php echo $_SERVER['PHP_SELF'].'?page='.$nextpage; ?>" rel="external nofollow" > Under 1 Page </a>
</body>
</html>
Note: When there are php and html in one file, the php file must have an end tag
Attachment: php general paging class and usage:
File Page. class. php:
<?php
/**
* 分页类
*
* 调用方式：
* $p=new Page(总条数,显示页数,当前页码,每页显示条数,[链接]);
* print_r($p->getPages()); //生成1个页码数组（键为页码，值为链接）
* echo $p->showPages(1); //生成1个页码样式（可添加自定义样式）
*
*/
/*
总条数，需要显示的页数，当前页，每页显示的条数，连接
生成1个1维数组，键为页码 值为连接
返回1个生成好样式的页码（并且可以根据自己需要添加样式）
默认样式 共45条记录,每页显示10条,当前第1/4页 [首页] [上页] [1] [2] [3] .. [下页] [尾页]
*/
class Page{
protected $count; //总条数
protected $showPages; //需要显示的页数
protected $countPages; //总页数
protected $currPage; //当前页
protected $subPages; //每页显示条数
protected $href; //连接
protected $page_arr=array(); //保存生成的页码 键页码 值为连接
/**
* __construct 构造函数（获取分页所需参数）
* @param int $count 总条数
* @param int $showPages 显示页数
* @param int $currPage 当前页数
* @param int $subPages 每页显示数量
* @param string $href 连接（不设置则获取当前URL）
*/
public function __construct($count,$showPages,$currPage,$subPages,$href=''){
$this->count=$count;
$this->showPages=$showPages;
$this->currPage=$currPage;
$this->subPages=$subPages;
//如果链接没有设置则获取当前连接
if(empty($href)){
$this->href=htmlentities($_SERVER['PHP_SELF']);
}else{
$this->href=$href;
}
$this->construct_Pages();
}
/**
* getPages 返回页码数组
* @return array 1维数组 键为页码 值为链接
*/
public function getPages(){
return $this->page_arr;
}
/**
* showPages 返回生成好的页码
* @param int $style 样式
* @return string 生成好的页码
*/
public function showPages($style=1){
$func='pageStyle'.$style;
return $this->$func();
}
/**
* pageStyle1 分页样式（可参照这个添加自定义样式 例如pageStyle2（））
* 样式 共45条记录,每页显示10条,当前第1/4页 [首页] [上页] [1] [2] [3] .. [下页] [尾页]
* @return string
*/
protected function pageStyle1(){
/* 构造普通模式的分页
共4523条记录,每页显示10条,当前第1/453页 [首页] [上页] [1] [2] [3] .. [下页] [尾页]
*/
$pageStr='共'.$this->count.'条记录，每页显示'.$this->subPages.'条';
$pageStr.='当前第'.$this->currPage.'/'.$this->countPages.'页 ';
$_GET['page'] = 1;
$pageStr.='<span>[<a href="'.$this->href.'?'.http_build_query($_GET).'" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >首页</a>] </span>';
//如果当前页不是第1页就显示上页
if($this->currPage>1){
$_GET['page'] = $this->currPage-1;
$pageStr.='<span>[<a href="'.$this->href.'?'.http_build_query($_GET).'" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >上页</a>] </span>';
}
foreach ($this->page_arr as $k => $v) {
$_GET['page'] = $k;
$pageStr.='<span>[<a href="'.$v.'" rel="external nofollow" >'.$k.'</a>] </span>';
}
//如果当前页小于总页数就显示下1页
if($this->currPage<$this->countPages){
$_GET['page'] = $this->currPage+1;
$pageStr.='<span>[<a href="'.$this->href.'?'.http_build_query($_GET).'" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >下页</a>] </span>';
}
$_GET['page'] = $this->countPages;
$pageStr.='<span>[<a href="'.$this->href.'?'.http_build_query($_GET).'" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >尾页</a>] </span>';
return $pageStr;
}
/**
* construct_Pages 生成页码数组
* 键为页码，值为链接
* $this->page_arr=Array(
* [1] => index.php?page=1
* [2] => index.php?page=2
* [3] => index.php?page=3
* ......)
*/
protected function construct_Pages(){
//计算总页数
$this->countPages=ceil($this->count/$this->subPages);
//根据当前页计算前后页数
$leftPage_num=floor($this->showPages/2);
$rightPage_num=$this->showPages-$leftPage_num;
//左边显示数为当前页减左边该显示的数 例如总显示7页 当前页是5 左边最小为5-3 右边为5+3
$left=$this->currPage-$leftPage_num;
$left=max($left,1); //左边最小不能小于1
$right=$left+$this->showPages-1; //左边加显示页数减1就是右边显示数
$right=min($right,$this->countPages); //右边最大不能大于总页数
$left=max($right-$this->showPages+1,1); //确定右边再计算左边，必须2次计算
for ($i=$left; $i <= $right; $i++) {
$_GET['page'] = $i;
$this->page_arr[$i]=$this->href.'?'.http_build_query($_GET);
}
}
}
?>
Usage example demo. php:
<?php
/**
* demo
*/
header("content-type:text/html;charset=utf8");
include('Page.class.php'); // Introducing class
//$p=new Page( Total number of articles , Number of pages displayed , Current page number , Number of items displayed per page ,[ Link ]);
// If the connection is not set, it is the current link
$page=isset($_GET['page']) ? $_GET['page'] : 1;
$p=new Page(100,4,$page,8);
// Generate 1 Page number array (key is page number and value is link)
echo "<pre>";
print_r($p->getPages());
// Style Altogether 45 A record , Display per page 10 Article , Current 1/4 Page [ Home page ] [ Previous page ] [1] [2] [3] .. [ Next page ] [ End page ]
echo $p->showPages(1);
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I hope this article is helpful to everyone's PHP programming.