class mysqlPager{
var $pagePerNum=5;//每页显示数据项数
var $pagePerGroup=5;//每分页组中页数
var $curPage=0;//当前页,Defualt 第一页
var $totalPage=0;//总页数
var $totalNum=0;//数据项总数
var $curPageGroup=0;//当前分页组
var $curPageUrl="";//当前用到分页的 URL
var $custom;//自定义风格
var $pageQuerySql="";
function mysqlPager(){//构造函数 PHP4
}
/**
* 初始化所有变量
*/
function InitAllVar($totalNum,$pagePerGroup,$curPageUrl,$curPage=1,$curPageGroup=1)
{
$this->totalNum=$totalNum;
$this->pagePerGroup=$pagePerGroup;
$this->curPageUrl=$curPageUrl;
$this->curPage=$curPage;
$this->curPageGroup=$curPageGroup;
}
/**
* 设置当前页变量
*
* @param 数字 $curPage
*/
function setCurPage($curPage)
{
$this->curPage=$curPage;
}
/**
* 设置当前分页组变量
*
* @param mixed $curPageGroup
*/
function setCurPageGroup($curPageGroup)
{
$this->curPageGroup=$curPageGroup;
}
/**
* 设置当前用到分布类的URL
* $curPageUrl string
*/
function setCurPageUrl($curPageUrl)
{
$this->curPageUrl=$curPageUrl;
}
/**
* 获取所有
*
* @param 数字 $totalNum
* @param 数字 $curPage
* @return float
*/
function getTotalPage($totalNum,$curPage=0)
{
return $this->totalPage=ceil($totalNum/$this->pagePerNum);
}
/**
* 设置用户自定义风格
*
* @param mixed $customStyle
*/
function setCustomStyle($customStyle)
{
$this->customStyle=$customStyle;
}
/**
* 设置用户自定义风格返回字符串
*
*
* @param mixed $pagerString
*/
function setCustomStyleString($pagerString)
{
return $styleString="".$pagerString."";
}
/**
* 输出导航页信息 可以不用参数,但是在使用前一定要设置相应的变量
*
* @param mixed $curPageGroup
* @param mixed $curPage
* @param mixed $curPageUrl
*/
function showNavPager($curPageGroup=0,$curPage=0,$curPageUrl=0)
{
if($curPageGroup)
{
$this->curPageGroup=$curPageGroup;
}
if($curPage)
{
$this->curPage=$curPage;
}
if($curPageUrl)
{
$this->curPageUrl=$curPageUrl;
}
$rtnString="";
//判断变量是否以经初始化
if($this->curPageGroup && $this->curPageUrl && $this->totalNum && $this->curPage)
{
$this->totalPage=$this->getTotalPage($this->totalNum);
if($this->curPage==1)
$this->curPage=($this->curPageGroup-1)*$this->pagePerGroup+1;
if($this->curPageGroup!=1)
{
$prePageGroup=$this->curPageGroup-1;
$rtnString.="".$this->setCustomStyleString(" ";
}
for($i=1;$ipagePerGroup;$i++)
{
$curPageNum=($this->curPageGroup-1)*$this->pagePerGroup+$i;
if($curPageNumtotalPage){
if($curPageNum==$this->curPage)
{
$rtnString.=" ".$this->setCustomStyleString($curPageNum);
}else
{
$rtnString.=" curPageUrl?cpg={$this->curPageGroup}&cp=$curPageNum >";
$rtnString.=$this->setCustomStyleString($curPageNum)."";
}
}
}
if($this->curPageGroup
{
$nextPageGroup=$this->curPageGroup+1;
$rtnString.=" curPageUrl?cpg=$nextPageGroup >".$this->setCustomStyleString(">>")."";
}
$this->pageQuerySql=" limit ".(($this->curPage-1)*$this->pagePerNum).",".$this->pagePerNum;
}
else
{
$rtnString="错误:变量未初始化!";
}
return $rtnString;
}
/**
* 得到完整的查询MYSQL的Sql语句
*
* @param mixed $sql
*/
function getQuerySqlStr($sql)
{
$allsql=$sql.$this->pageQuerySql;
return $allsql;
}
/**
* 设置每页有多少数据项
*
* @param INT $num
*/
function setPagePerNum($num)
{
$this->pagePerNum=$num;
}
}
?>
使用方法:
$curPage=$_GET['cp'];
$curPageGroup=$_GET['cpg']
if($curPage=="")
$curPage=1;
if($curPageGroup=="")
$curPageGroup=1;
//都是从1开始,之前要对传入的数据进行验证,防注入
//。。。
$pager=new MysqlPager();
$pager->initAllVar(...)
$pager->showNavPager();
//后面的SQL可以是任意的输出
$sql="select id form dbname ";
$querysql=$pager->getQuerySqlStr($sql)
//以后用$querysql 查询数据库就可以得到相应的结果集了

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Dreamweaver Mac version
Visual web development tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

SublimeText3 Mac version
God-level code editing software (SublimeText3)

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment