search
HomeBackend DevelopmentPHP TutorialSimple paging class and usage examples implemented in PHP, php paging usage examples_PHP tutorial

PHP实现的简单分页类及用法示例,php分页用法示例

本文实例讲述了PHP实现的简单分页类及用法。分享给大家供大家参考,具体如下:

<&#63;php
/*
 * 使用:
 * $page = new Page(连接符,查询语句,当前页码,每页大小,页码符)
 * 连接符:一个MYSQL连接标识符,如果该参数留空,则使用最近一个连接
 * 查询语句:SQL语句
 * 当前页码:指定当前是第几页
 * 每页大小:每页显示的记录数
 * 页码符:指定当前页面URL格式
 *
 * 使用例子:
 * $sql = "select * from aa";
 * $page = new Page($conn,$sql,$_GET['page'],4,"&#63;page=");
 *
 * 获得当前页码
 * $page->page;
 *
 * 获得总页数
 * $page->pageCount;
 *
 * 获得总记录数
 * $page->rowCount;
 *
 * 获得本页记录数
 * $page->listSize;
 *
 * 获得记录集
 * $page->list;
 * 记录集是一个2维数组,例:list[0]['id']访问第一条记录的id字段值.
 *
 * 获得页码列表
 * $page->getPageList();
 */
class Page
{
  //基础数据
  var $sql;
  var $page;
  var $pageSize;
  var $pageStr;
  //统计数据
  var $pageCount; //页数
  var $rowCount; //记录数
  //结果数据
  var $list = array(); //结果行数组
  var $listSize ;
  //构造函数
  function Page($conn,$sql_in,$page_in,$pageSize_in,$pageStr_in)
  {
    $this->sql = $sql_in;
    $this->page = intval($page_in);
    $this->pageSize = $pageSize_in;
    $this->pageStr = $pageStr_in;
    //页码为空或小于1的处理
    if(!$this->page||$this->page<1)
    {
      $this->page = 1;
    }
    //查询总记录数
    $rowCountSql = preg_replace("/([\w\W]*&#63;select)([\w\W]*&#63;)(from[\w\W]*&#63;)/i","$1 count(0) $3",$this->sql);
    if(!$conn)
      $rs = mysql_query($rowCountSql) or die("bnc.page: error on getting rowCount.");
    else
      $rs = mysql_query($rowCountSql,$conn) or die("bnc.page: error on getting rowCount.");
    $rowCountRow = mysql_fetch_row($rs);
    $this->rowCount=$rowCountRow[0];
    //计算总页数
    if($this->rowCount%$this->pageSize==0)
      $this->pageCount = intval($this->rowCount/$this->pageSize);
    else
      $this->pageCount = intval($this->rowCount/$this->pageSize)+1;
    //SQL偏移量
    $offset = ($this->page-1)*$this->pageSize;
    if(!$conn)
      $rs = mysql_query($this->sql." limit $offset,".$this->pageSize) or die("bnc.page: error on listing.");
    else
      $rs = mysql_query($this->sql." limit $offset,".$this->pageSize,$conn) or die("bnc.page: error on listing.");
    while($row=mysql_fetch_array($rs))
    {
      $this->list[]=$row;
    }
    $this->listSize = count($this->list);
  }
  /*
   * getPageList方法生成一个较简单的页码列表
   * 如果需要定制页码列表,可以修改这里的代码,或者使用总页数/总记录数等信息进行计算生成.
   */
  function getPageList()
  {
    $firstPage;
    $previousPage;
    $pageList;
    $nextPage;
    $lastPage;
    $currentPage;
    //如果页码>1则显示首页连接
    if($this->page>1)
    {
      $firstPage = "<a href=\"".$this->pageStr."1\">首页</a>";
    }
    //如果页码>1则显示上一页连接
    if($this->page>1)
    {
      $previousPage = "<a href=\"".$this->pageStr.($this->page-1)."\">上一页</a>";
    }
    //如果没到尾页则显示下一页连接
    if($this->page<$this->pageCount)
    {
      $nextPage = "<a href=\"".$this->pageStr.($this->page+1)."\">下一页</a>";
    }
    //如果没到尾页则显示尾页连接
    if($this->page<$this->pageCount)
    {
      $lastPage = "<a href=\"".$this->pageStr.$this->pageCount."\">尾页</a>";
    }
    //所有页码列表
    for($counter=1;$counter<=$this->pageCount;$counter++)
    {
      if($this->page == $counter)
      {
        $currentPage = "<b>".$counter."</b>";
      }
      else
      {
        $currentPage = " "."<a href=\"".$this->pageStr.$counter."\">".$counter."</a>"." ";
      }
      $pageList .= $currentPage;
    }
    return $firstPage." ".$previousPage." ".$pageList." ".$nextPage." ".$lastPage." ";
  }
}
&#63;>

用法示例:

<&#63;php
@$db = mysql_connect('localhost', 'root', '123456') or
    die("Could not connect to database.");//连接数据库
mysql_query("set names 'utf8'");//输出中文
mysql_select_db('test');    //选择数据库
$sql = "select * from `users`"; //一个简单的查询
$page = new Page('',$sql,$_GET['page'],5,"&#63;page=");
$rows = $page->list;
foreach($rows as $row)
{
  echo $row['UserName']."<br>";
}
echo $page->getPageList(); //输出分页列表
&#63;>

更多关于PHP相关内容感兴趣的读者可查看本站专题:《PHP数组(Array)操作技巧大全》、《PHP数学运算技巧总结》、《php正则表达式用法总结》、《PHP+ajax技巧与应用小结》、《PHP运算与运算符用法总结》、《PHP网络编程技巧总结》、《PHP基本语法入门教程》、《php日期与时间用法总结》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/1123791.htmlTechArticlePHP实现的简单分页类及用法示例,php分页用法示例 本文实例讲述了PHP实现的简单分页类及用法。分享给大家供大家参考,具体如下: php/...
Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
How do you modify data stored in a PHP session?How do you modify data stored in a PHP session?Apr 27, 2025 am 12:23 AM

TomodifydatainaPHPsession,startthesessionwithsession_start(),thenuse$_SESSIONtoset,modify,orremovevariables.1)Startthesession.2)Setormodifysessionvariablesusing$_SESSION.3)Removevariableswithunset().4)Clearallvariableswithsession_unset().5)Destroythe

Give an example of storing an array in a PHP session.Give an example of storing an array in a PHP session.Apr 27, 2025 am 12:20 AM

Arrays can be stored in PHP sessions. 1. Start the session and use session_start(). 2. Create an array and store it in $_SESSION. 3. Retrieve the array through $_SESSION. 4. Optimize session data to improve performance.

How does garbage collection work for PHP sessions?How does garbage collection work for PHP sessions?Apr 27, 2025 am 12:19 AM

PHP session garbage collection is triggered through a probability mechanism to clean up expired session data. 1) Set the trigger probability and session life cycle in the configuration file; 2) You can use cron tasks to optimize high-load applications; 3) You need to balance the garbage collection frequency and performance to avoid data loss.

How can you trace session activity in PHP?How can you trace session activity in PHP?Apr 27, 2025 am 12:10 AM

Tracking user session activities in PHP is implemented through session management. 1) Use session_start() to start the session. 2) Store and access data through the $_SESSION array. 3) Call session_destroy() to end the session. Session tracking is used for user behavior analysis, security monitoring, and performance optimization.

How can you use a database to store PHP session data?How can you use a database to store PHP session data?Apr 27, 2025 am 12:02 AM

Using databases to store PHP session data can improve performance and scalability. 1) Configure MySQL to store session data: Set up the session processor in php.ini or PHP code. 2) Implement custom session processor: define open, close, read, write and other functions to interact with the database. 3) Optimization and best practices: Use indexing, caching, data compression and distributed storage to improve performance.

Explain the concept of a PHP session in simple terms.Explain the concept of a PHP session in simple terms.Apr 26, 2025 am 12:09 AM

PHPsessionstrackuserdataacrossmultiplepagerequestsusingauniqueIDstoredinacookie.Here'showtomanagethemeffectively:1)Startasessionwithsession_start()andstoredatain$_SESSION.2)RegeneratethesessionIDafterloginwithsession_regenerate_id(true)topreventsessi

How do you loop through all the values stored in a PHP session?How do you loop through all the values stored in a PHP session?Apr 26, 2025 am 12:06 AM

In PHP, iterating through session data can be achieved through the following steps: 1. Start the session using session_start(). 2. Iterate through foreach loop through all key-value pairs in the $_SESSION array. 3. When processing complex data structures, use is_array() or is_object() functions and use print_r() to output detailed information. 4. When optimizing traversal, paging can be used to avoid processing large amounts of data at one time. This will help you manage and use PHP session data more efficiently in your actual project.

Explain how to use sessions for user authentication.Explain how to use sessions for user authentication.Apr 26, 2025 am 12:04 AM

The session realizes user authentication through the server-side state management mechanism. 1) Session creation and generation of unique IDs, 2) IDs are passed through cookies, 3) Server stores and accesses session data through IDs, 4) User authentication and status management are realized, improving application security and user experience.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

Safe Exam Browser

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.