


PHP ajax realizes paging without refresh, phpajax refresh paging_PHP tutorial
php ajax implements refresh-free paging, phpajax refreshes paging
This article describes the implementation method of php ajax without refresh paging. Share it with everyone for your reference. The details are as follows:
limit offset, length;
Limit 0,7; First page
Limit 7,7; Second page
Limit 14,7; Page 3
Number of messages per page: 7
Total number of messages: select count(*) from table
Total number of pages of information: ceil rounded up (total number of items/number of items per page)
1. Specific use of paging class
<?php class Pagination { private $total; //数据表中总记录数 private $listRows; //每页显示行数 private $limit; //mysql 数据库的limit private $uri; //分页信息前面的uri地址 private $pageNum; //页数 private $config = array('header' => "个记录", "prev" => "【上一页】", "next" => "【下一页】", "first" => "【首 页】", "last" => "【尾 页】"); private $listNum = 8; /* * $total 当前信息总条数 * $listRows 每页显示的条数 * $pa 下面的page http://网址/index.php?page=5 */ public function __construct($total, $listRows = 10, $pa = "") { $this->total = $total; $this->listRows = $listRows; $this->uri = $this->getUri($pa); $this->page = !empty($_GET["page"]) ? $_GET["page"] : 1;//不传入page,则默认显示首页 $this->pageNum = ceil($this->total / $this->listRows); $this->limit = $this->setLimit(); } //设置每页显示的条数 private function setLimit() { return "Limit " . ($this->page - 1) * $this->listRows . ", {$this->listRows}"; } //获得URL地址 private function getUri($pa) { $url = $_SERVER["REQUEST_URI"] . (strpos($_SERVER["REQUEST_URI"], '?') ? '' : "?") . $pa; $parse = parse_url($url); if (isset($parse["query"])) { parse_str($parse['query'], $params); unset($params["page"]); $url = $parse['path'] . '?' . http_build_query($params); } return $url; } //魔术方法, public function __get($args) { if ($args == "limit") return $this->limit; else return null; } //页面开始的条数 private function start() { if ($this->total == 0) return 0; else return ($this->page - 1) * $this->listRows + 1; } //页面结束的条数 private function end() { return min($this->page * $this->listRows, $this->total); } /*设置首页*/ private function first() { $html = ""; if ($this->page == 1) $html.=' '.$this->config["first"].' '; else $html.=" <a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page=1\")'>{$this->config["first"]}</a> "; //$html.=" <a href='{$this->uri}&page=1'>{$this->config["first"]}</a> "; return $html; } /*设置上一页*/ private function prev() { $html = ""; if ($this->page == 1) $html.=' '.$this->config["prev"].' '; else $html.=" <a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page=" . ($this->page - 1) . "\")'>{$this->config["prev"]}</a> "; //$html.=" <a href='{$this->uri}&page=".($this->page-1)."'>{$this->config["prev"]}</a> "; return $html; } //页码列表【首页】【2】【3】…………【尾页】 private function pageList() { $linkPage = ""; $inum = floor($this->listNum / 2); for ($i = $inum; $i >= 1; $i--) { $page = $this->page - $i; if ($page < 1) continue; $linkPage.=" <a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page={$page}\")'>{$page}</a> "; } $linkPage.=" {$this->page} "; for ($i = 1; $i <= $inum; $i++) { $page = $this->page + $i; if ($page <= $this->pageNum) $linkPage.=" <a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page={$page}\")'>{$page}</a> "; else break; } return $linkPage; } /*设置下一页*/ private function next() { $html = ""; if ($this->page == $this->pageNum) $html.=' '.$this->config["next"].' '; else $html.=" <a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page=" . ($this->page + 1) . "\")'>{$this->config["next"]}</a> "; //$html.=" <a href='{$this->uri}&page=".($this->page + 1)."'>{$this->config["next"]}</a> "; return $html; } /*设置尾页*/ private function last() { $html = ""; if ($this->page == $this->pageNum) $html.=' '.$this->config["last"].' '; else $html.=" <a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page=" . ($this->pageNum) . "\")'>{$this->config["last"]}</a> "; //$html.=" <a href='{$this->uri}&page=.(this->pageNum).'>{$this->config["last"]}</a> "; return $html; } /*设置页面跳转*/ private function goPage() { return ' <input type="text" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>' . $this->pageNum . ')?' . $this->pageNum . ':this.value;showPage(\'' . $this->uri . '&page=\'+page+\'\')}" value="' . $this->page . '" style="width:25px"> <input type="button" value="GO" onclick="javascript:var page=(this.previousSibling.value>' . $this->pageNum . ')?' . $this->pageNum . ':this.previousSibling.value;showPage(\'' . $this->uri . '&page=\'+page+\'\')"> '; } //页面列表配置选项 function fpage($display = array(0, 1, 2, 3, 4, 5, 6, 7, 8)) { $html[0] = " 共有<b>{$this->total}</b>{$this->config["header"]} "; $html[1] = " 每页显示<b>" . ($this->end() - $this->start() + 1) . "</b>条,本页<b>{$this->start()}-{$this->end()}</b>条 "; $html[2] = " <b>{$this->page}/{$this->pageNum}</b>页 "; $html[3] = $this->first(); $html[4] = $this->prev(); $html[5] = $this->pageList(); $html[6] = $this->next(); $html[7] = $this->last(); $html[8] = $this->goPage(); $fpage = ''; foreach ($display as $index) { $fpage.=$html[$index]; } return $fpage; } }
2 Data display
<?php //链接数据库 //获得具体信息 //分页显示 header("content-type:text/html;charset=utf-8"); $link = mysql_connect('localhost','root','111111'); mysql_select_db('shop', $link); mysql_query("set names utf8"); $css = <<<eof <style type="text/css"> table {border:1px solid black; width:700px; margin:auto; border-collapse:collapse;} td {border:1px solid black; } </style> eof; echo $css; echo " <table> <tr><td>序号</td><td>名称</td><td>数量</td><td>价格</td><td>时间</td></tr> "; //1 引入分页类 include "./Pagination.php"; //2. 获得信息总条数 $sql = "select * from sw_goods"; $qry = mysql_query($sql); $total = mysql_num_rows($qry); $per = 7; //3. 实例化分页类对象 $page_obj = new Pagination($total,$per); //4. 拼装sql语句,获得每页信息 //利用page_obj实现limit的灵活设置 //$page_obj -> limit; $sqla = "select * from sw_goods ".$page_obj->limit; $qrya = mysql_query($sqla); //5. 获得页面列表 $pagelist = $page_obj -> fpage(array(3,4,5,6,7,8)); $i=1; while($rsta = mysql_fetch_assoc($qrya)){ echo "<tr>"; echo "<td>".$i++."</td>"; echo "<td>".$rsta['goods_name']."</td>"; echo "<td>".$rsta['goods_number']."</td>"; echo "<td>".$rsta['goods_price']."</td>"; echo "<td>".date("Y-m-d H:i:s",$rsta['goods_create_time'])."</td>"; echo "</tr>"; } echo "<tr><td colspan=5>".$pagelist."</td></tr>"; echo "</table>";
3 Ajax non-refresh paging implementation
open('get','http://url/index.php?page=2')
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <title>新建网页</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="description" content="" /> <meta name="keywords" content="" /> <script type="text/javascript"> //获得分页信息ajax函数 function showPage(myurl){ var xhr = new XMLHttpRequest(); xhr.onreadystatechange = function(){ if(xhr.readyState==4){ var rst = document.getElementById("result"); rst.innerHTML = xhr.responseText; } } xhr.open("get",myurl); xhr.send(null); } window.onload = function(){ showPage("./data1.php"); //获得分页信息 //showPage("./data.php?page=2"); } </script> <style type="text/css"> </style> </head> <body> <h2 id="ajax无刷新分页效果">ajax无刷新分页效果</h2> <div id="result"></div> </body> </html> <script type="text/javascript"> document.write(new Date()+"<br />"); document.write(new Date()+"<br />"); document.write(new Date()+"<br />"); document.write(new Date()+"<br />"); </script>
I hope this article will be helpful to everyone’s PHP programming design.

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

PHP is not dead. 1) The PHP community actively solves performance and security issues, and PHP7.x improves performance. 2) PHP is suitable for modern web development and is widely used in large websites. 3) PHP is easy to learn and the server performs well, but the type system is not as strict as static languages. 4) PHP is still important in the fields of content management and e-commerce, and the ecosystem continues to evolve. 5) Optimize performance through OPcache and APC, and use OOP and design patterns to improve code quality.

PHP and Python have their own advantages and disadvantages, and the choice depends on the project requirements. 1) PHP is suitable for web development, easy to learn, rich community resources, but the syntax is not modern enough, and performance and security need to be paid attention to. 2) Python is suitable for data science and machine learning, with concise syntax and easy to learn, but there are bottlenecks in execution speed and memory management.

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.


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