PHP实现的简单分页类及用法示例,php分页用法示例
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:
<?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,"?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]*?select)([\w\W]*?)(from[\w\W]*?)/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." ".$lastPage." "; } } ?>
用法示例:
<?php @$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,"?page="); $rows = $page->list; foreach($rows as $row) { echo $row['UserName']."<br>"; } echo $page->getPageList(); //输出分页列表 ?>
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。

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

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

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

Hot Topics











PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

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 is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.
