PHP 简单分页献给小白

<!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>人员信息</title>

    <?php

    function page($pageNum = 1,$pageSize=3){
        //1. 链接数据库
        $conn = @new mysqli("127.0.0.1","root","123");

        if($conn->connect_errno){ //返回链接错误号
            //返回链接错误信息
            die("数据库链接失败：".$conn->connect_error);
        }

        //2. 选择数据库
        $conn->select_db("collect") or die("选择数据库失败：".$conn->error);

        //3.设置字符集编码
        $conn->set_charset("utf8") or die("设置字符集失败：".$conn->error);

        //4. 准备SQL语句
        $sql = "select * from page limit " . (($pageNum - 1) * $pageSize) . "," . $pageSize;
        //5. 执行SQL语句，返回结果集或者布尔类型true/false
        $res = $conn->query($sql);
        $ress = array();
        while( $row =  $res->fetch_array()) {
            $ress[] = $row;
        }
        $res->close();
        $conn->close();
        return $ress;
    }

    function allpage(){
        //1. 链接数据库
        $conn = @new mysqli("127.0.0.1","root","123");

        if($conn->connect_errno){ //返回链接错误号
            //返回链接错误信息
            die("数据库链接失败：".$conn->connect_error);
        }

        //2. 选择数据库
        $conn->select_db("collect") or die("选择数据库失败：".$conn->error);

        //3.设置字符集编码
        $conn->set_charset("utf8") or die("设置字符集失败：".$conn->error);

        //4. 准备SQL语句
        $sql = "select count(*) num from page";
        //5. 执行SQL语句，返回结果集或者布尔类型true/false
        $res = $conn->query($sql);
        $obj = mysqli_fetch_object($res);
        $res->close();
        $conn->close();
        return $obj->num;
    }
        $allNum = allpage();
        //规定一页显示几个人员信息
        $pageSize = 3;
        //分页
        $pageNum = empty($_GET["pageNum"])?1:$_GET["pageNum"];
        $endPage = ceil($allNum/$pageSize); //总页数
        $array = page($pageNum,$pageSize);



    ?>
</head>
<body>
    <table cellspacing="0" cellpadding="1" width="500" border="1" style="text-align: center">
        <tr>
            <th>编号</th>
            <th>姓名</th>
            <th>年龄</th>
        </tr>
        <?php
            foreach ($array as $v){
                echo "<tr>";
                echo "<td>{$v['id']}</td>";
                echo "<td>{$v['name']}</td>";
                echo "<td>{$v{'age'}}</td>";
                echo "</tr>";
            }
        ?>
    </table>
    <div>
        <a href="?pageNum=1">首页</a>
        <a href="?pageNum=<?php echo $pageNum==1?1:($pageNum-1)?>">上一页</a>
        <a href="?pageNum=<?php echo $pageNum==$endPage?$endPage:($pageNum+1)?>">下一页</a>
        <a href="?pageNum=<?php echo $endPage?>">尾页</a>

    </div>

</body>
</html>
PHP 简单分页 献给小白

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