Php 基于MySQL页面的查询

我目前正在为一个内容站点开发一个分页系统

目前，用户每页将看到10个结果。当用户访问时，它应该显示表中的前10个条目。如果他们访问，则应显示随后的10个结果

下面是我当前执行任务的功能，当访问一个页面时，它似乎不起作用-有什么想法可能导致这种情况吗

function getPagedPosts() {
$pageid = $_GET[page];
$page = $pageid - 1 * 10;
$options = array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8'); 
$db = new PDO("mysql:host={$host};dbname={$dbname};charset=utf8", $username, $password, $options); 
$query = " 
    SELECT *
    FROM content
    LIMIT '$page', 10
"; 

    try 
    { 
        $stmt = $db->prepare($query); 
        $stmt->execute(); 
    } 
    catch(PDOException $ex) 
    { 
        die("Failed to run query: " . $ex->getMessage()); 
    } 

    $rows = $stmt->fetchAll(); 
foreach($rows as $row):
    print '<tr><td><a href="post/' . $row['id'] . '">' . $row['title'] . '</a><div class="sub ' . $row['subject'] . '">' . $row['subject'] . '</div></td></tr>';
endforeach;

函数getPagedPosts（）{ $pageid=$\u获取[页面]； $page=$pageid-1*10； $options=array（PDO:：MYSQL_ATTR_INIT_命令=>'SET NAMES utf8'）； $db=newpdo（“mysql:host={$host}；dbname={$dbname}；charset=utf8”，$username，$password，$options）； $query=” 挑选* 从内容 限制“$page”，10页 "; 尝试 { $stmt=$db->prepare（$query）； $stmt->execute（）； } 捕获（PDO异常$ex） { die（“无法运行查询：”..ex->getMessage（））； } $rows=$stmt->fetchAll（）； foreach（$行作为$行）： 打印“.$row['subject']”； endforeach；

---

}

我创建了一个称为分页的函数：

<?php

function pagination($query, $per_page = 10,$page = 1, $url = '?'){        
    $query = "SELECT COUNT(*) as `num` FROM {$query}";
    $row = mysql_fetch_array(mysql_query($query));
    $total = $row['num'];
    $adjacents = "2"; 

    $page = ($page == 0 ? 1 : $page);  
    $start = ($page - 1) * $per_page;                               

    $prev = $page - 1;                          
    $next = $page + 1;
    $lastpage = ceil($total/$per_page);
    $lpm1 = $lastpage - 1;

    $pagination = "";
    if($lastpage > 1)
    {   
        $pagination .= "<ul class='pagination'>";
                $pagination .= "<li class='details'>Page $page of $lastpage</li>";
        if ($lastpage < 7 + ($adjacents * 2))
        {   
            for ($counter = 1; $counter <= $lastpage; $counter++)
            {
                if ($counter == $page)
                    $pagination.= "<li><a class='current'>$counter</a></li>";
                else
                    $pagination.= "<li><a href='{$url}page=$counter'>$counter</a></li>";                    
            }
        }
        elseif($lastpage > 5 + ($adjacents * 2))
        {
            if($page < 1 + ($adjacents * 2))        
            {
                for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
                {
                    if ($counter == $page)
                        $pagination.= "<li><a class='current'>$counter</a></li>";
                    else
                        $pagination.= "<li><a href='{$url}page=$counter'>$counter</a></li>";                    
                }
                $pagination.= "<li class='dot'>...</li>";
                $pagination.= "<li><a href='{$url}page=$lpm1'>$lpm1</a></li>";
                $pagination.= "<li><a href='{$url}page=$lastpage'>$lastpage</a></li>";      
            }
            elseif($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2))
            {
                $pagination.= "<li><a href='{$url}page=1'>1</a></li>";
                $pagination.= "<li><a href='{$url}page=2'>2</a></li>";
                $pagination.= "<li class='dot'>...</li>";
                for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++)
                {
                    if ($counter == $page)
                        $pagination.= "<li><a class='current'>$counter</a></li>";
                    else
                        $pagination.= "<li><a href='{$url}page=$counter'>$counter</a></li>";                    
                }
                $pagination.= "<li class='dot'>..</li>";
                $pagination.= "<li><a href='{$url}page=$lpm1'>$lpm1</a></li>";
                $pagination.= "<li><a href='{$url}page=$lastpage'>$lastpage</a></li>";      
            }
            else
            {
                $pagination.= "<li><a href='{$url}page=1'>1</a></li>";
                $pagination.= "<li><a href='{$url}page=2'>2</a></li>";
                $pagination.= "<li class='dot'>..</li>";
                for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++)
                {
                    if ($counter == $page)
                        $pagination.= "<li><a class='current'>$counter</a></li>";
                    else
                        $pagination.= "<li><a href='{$url}page=$counter'>$counter</a></li>";                    
                }
            }
        }

        if ($page < $counter - 1){ 
            $pagination.= "<li><a href='{$url}page=$next'>Next</a></li>";
            $pagination.= "<li><a href='{$url}page=$lastpage'>Last</a></li>";
        }else{
            $pagination.= "<li><a class='current'>Next</a></li>";
            $pagination.= "<li><a class='current'>Last</a></li>";
        }
        $pagination.= "</ul>\n";        
    }


    return $pagination;
} 
?>

<?php
//get the function
include_once ('include/functions/pagination.php');

    $page = (int) (!isset($_GET["page"]) ? 1 : $_GET["page"]);
    $limit = 5;
    $startpoint = ($page * $limit) - $limit;

    //to make pagination
    $statement = "`prodcat_mst`"; //table name 'prodcat_mst'
?>

显示分页：

<?php
    echo pagination($statement,$limit,$page);
?>

---

希望这能有所帮助。

到底出了什么问题？（但是，幸运的是：删除查询中

'$page'

周围的引号，字符串对于

LIMIT

子句无效。我会将其设置为

$page=（max（（int）$pageid，1）-1）*10、 

对于摆弄你的URL的人来说也是如此……谢谢你-现在一切似乎都正常了！没有显示关于你的问题的结果。现在效果很好。

<?php
    echo pagination($statement,$limit,$page);
?>