分页函数:
实例
<meta charset="utf-8"> <?php /** * 分页查询的原理 * */ header('Content-Type:text/html; charset=UTF-8'); $page = isset($_GET['p'])? $_GET['p']:1; $page = ($page == 0 ) ? 1 : $page; $num = 5; $offset = ($page-1)*$num; //1.获取到所有数据,用表格显示出来 $pdo = new PDO('mysql:host=localhost;dbname=php','root', 'root'); //$sql = "SELECT id,name,email FROM user1 LIMIT 0,3"; $sql = "SELECT `staff_id`,`name`,`sex`,`age`,`salary` FROM `staff` LIMIT :offset, :num"; $stmt = $pdo->prepare($sql); $stmt->bindParam(':offset', $offset, PDO::PARAM_INT); $stmt->bindParam(':num', $num, PDO::PARAM_INT); $stmt->execute(); $stmt->setFetchMode(PDO::FETCH_ASSOC); $res = $stmt->fetchAll(); echo '<h2 align="center">员工信息表</h2>'; echo '<table border="1" cellspacing="0" cellpadding="5" width="70%" align="center">'; echo '<tr bgcolor="lightgreen"><th>ID</th><th>用户名</th><th>性别</th><th>年龄</th><th>工资</th></tr>'; foreach ($res as $row) { echo '<tr align="center">'; echo '<td>'.$row['staff_id'].'</td><td>'.$row['name'].'</td>'; $row['sex'] = $row['sex']==0 ? '男' : '<span style="color:red">女</span>'; echo '<td>'.$row['sex'].'</td>'; echo '<td>'.$row['age'].'</td><td>'.$row['salary'].'</td>'; echo '</tr>'; } echo '</table>'; //计算共计多少页? $stmt2 = $pdo->prepare("SELECT * FROM staff"); $stmt2->execute(); $totalPage = ceil($stmt2->rowCount() / $num); $page = ($page == $totalPage) ? ($totalPage-1) : $page; echo '<style>a {margin-left: 10px;text-decoration: none}a:hover{color:red}</style>'; echo '<h3 align="center">'; echo '<a href="http://php.io/0427/page.php?p=1">首页</a>'; echo '<a href="http://php.io/0427/page.php?p='; echo (($page-1)==0)?1:($page-1); echo '">上一页</a>'; for ($i=1; $i<=$totalPage; $i++) { echo '<a href="http://php.io/0427/page.php?p='.$i.'">'.$i.'</a>'; } echo '<a href="http://php.io/0427/page.php?p='.($page+1).'">下一页</a>'; echo '<a href="http://php.io/0427/page.php?p='.$totalPage.'">尾页</a>'; echo '</h3>';
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