用location.search实现页码的高亮显示:
服务器端php代码:
实例
<?php //获取当前显示的页数 //intval()将获取的字符串转为数值 $page = intval($_GET['p']); //连接数据库 $pdo = new PDO('mysql:host=127.0.0.1;dbname=php','root','root'); //每页显示五条数据 $num = 5; //ceil(1.2); //向上取整函数,最终获得2 //获取总页数 $sql = "SELECT CEIL(COUNT(*)/{$num}) FROM `movies`"; $stmt = $pdo->prepare($sql); $stmt->execute(); $pages = $stmt->fetchColumn(0); //fetchColumn(0)获取第一列数据 // 每页的显示起止位置: 偏移量 // 偏移量 = 当前显示数量 * (当前页码 - 1) $offset = $num * ($page - 1); //LEFT():截取();CONCAT():字符串拼接 $sql = "SELECT `mov_id`,`name`, CONCAT(LEFT(`detail`, 20),'......') FROM `movies` LIMIT {$num} OFFSET {$offset}"; $stmt = $pdo->prepare($sql); $stmt->execute(); $result = $stmt->fetchAll(PDO::FETCH_ASSOC); //二维数组 //将查询结果集转换成json字符串返回到前端 echo json_encode([$pages , $result]);
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前端网页代码:
实例
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>最新影视剧介绍</title> <style> /*设置表格样式*/ table { /*折叠表格线与单元格之间的间隙*/ border-collapse:collapse; width: 90%; } /*设置表格与单元格边框*/ table,th, td { border: 1px solid black; } /*设置标题行背景色*/ table thead tr:first-of-type { background-color: lightblue; } /*设置每一列的宽度*/ table tbody tr td:nth-of-type(1) { width: 10%; } table tbody tr td:nth-of-type(2){ width: 20%; } table tbody tr td:nth-of-type(3) { width: 70%; } /*设置分页条样式*/ ul { text-align: center; } ul li { /*去掉默认样式*/ list-style-type: none; /*转为水平显示*/ display: inline-block; width: 30px; height: 20px; border: 1px solid black; /*垂直水平居中*/ text-align: center; line-height: 20px; cursor: pointer; margin-left: 5px; } ul li:hover { background-color: lightblue; border: 1px solid red; } /*作业: 如何设置当前页码的高亮?*/ .active { background-color: lightblue; border: 1px solid red; } </style> </head> <?php //echo isset($_GET['P']) ? $_GET['p'] : 1?> <!--简写--> <body onload="getData(<?=$_GET['p']?? 1; ?>)"> <table> <caption>最新影视剧介绍</caption> <thead> <tr> <td>序号</td> <td>片名</td> <td>简介</td> </tr> </thead> <tbody> </tbody> </table> <!--分页符--> <ul> </ul> <script> function getData(p) { //控制台中打印参数 console.log(p); //创建ajax对象 var request = new XMLHttpRequest(); //监听请求 request.onreadystatechange = function () { //请求成功 if (request.readyState === 4) { //将服务器返回的json字符串转换为js对象 var data = JSON.parse(request.responseText); // console.log(data); //动态显示分页条 var ul = document.getElementsByTagName('ul').item(0); for (var i = 0, n = data[0];i < n; i += 1) { var li = document.createElement('li'); li.innerText = (i+1); // console.log(li.innerTEXT); //↓↓地址输入php.io/6.11/show.php ,分页按钮失效,点击1后转跳php.io/6.11/1↓↓ //li就是当前页码 li.onclick = function () { var search = location.search.slice(0,3) + this.innerText; //替换当前请求 location.replace(search); }; ul.appendChild(li); } //页码高亮显示 // console.log(location.search); //parseInt将获取到的字符串转变为数字类型 var page = parseInt(location.search.slice(3,4)); //获取已经生成的两个li var li1 = document.getElementsByTagName('li').item(0); var li2 = document.getElementsByTagName('li').item(1); //用If语句判断当前页码,以此来改变页码高亮显示 if (page === 1) { li1.className = 'active'; li2.className = null; }else if (page === 2) { li2.className = 'active'; li1.className = null; } //将数据表内容,渲染到表格中 var tbody = document.getElementsByTagName('tbody').item(0); // console.log(data[1]); data[1].forEach(function (value) { // console.log(value); var tr = document.createElement('tr'); for (var key in value) { var td = document.createElement('td'); td.innerText = value[key]; tr.appendChild(td); } tbody.appendChild(tr); }); } }; //配置请求 request.open('GET','get_movies.php?p='+p.toString(),true); //发送请求 request.send(null); } </script> </body> </html>
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选中第一页的显示效果:
选中第二页的显示效果: