Question

我必须显示，在php中显示2到5的分页。我在这里列出的代码对我有用。诚实说我已经改变了源代码。知道我想知道。如何引入回声＆＃34;在5＆＃34;的总记录中显示1到5;在这段代码中。我不知道如何实现这一点。

我的代码在这里：

<?php
    $rowstodisplay =2;
    $currentPage = $_SERVER["PHP_SELF"];
    $pid = 0;
    if (isset($_GET['pid'])) 
    { 
        $pid = $_GET['pid']; 
    }
    $startrow = $pid * $rowstodisplay;

    $selectorders=sprintf("SELECT * FROM  parent_cat ORDER BY p_cat ASC");
    $results = mysql_query($selectorders) or die(mysql_error());
    $tot_rsselect = mysql_num_rows($results);

    $query_limit_results = sprintf("%s LIMIT %d, %d", $selectorders, $startrow, $rowstodisplay);
    $myorderquery = mysql_query($query_limit_results) or die(mysql_error());
    $totalpages = ceil($tot_rsselect/$rowstodisplay)-1;

    $navblock = "";
    if ($pid <= $totalpages) 
        {
        if ($pid > 0) 
        {
            $navblock .= '<a href="'.$currentPage.'?pid=0">First</a> | <a href="'.$currentPage.'?pid='.max(0,$pid-1).'">Previous</a>'; 
        }
        if ( ($pid > 0)&&($pid < $totalpages) ) 
        { 
            $navblock .= " | ";  
        } 
        if ($pid < $totalpages) 
        {
            $navblock .= '<a href="'.$currentPage.'?pid='.min($totalpages, $pid+1).'">Next</a> | <a href="'.$currentPage.'?pid='.$totalpages.'">Last</a>';         
        }
    }
    $nolinks = 15;
    $navpageno = "";
    if ($pid <= $totalpages)
    {
        for($i=max(0,$pid-$nolinks); $i<=min($totalpages, $pid+$nolinks); $i++) 
        {
            $pageno = $i+1;
            if($pid  == $i) 
            { 
                $navpageno .= '<li class="navigation2">'.$pageno.' </li>'; 
            }
            else 
            { 
                $navpageno .= '<li class="navigation"><a href="'.$currentPage.'?pid='.$i.'">'.$pageno.'</a></li>'; 
            }
        }
    } 

    if($navblock != "") 
    {
    ?> 
        <ul class="navigationholder"><?php echo $navpageno; ?></ul> 
    <?php 
    }
?>

Answer 1

虽然评论被发现，但您希望快速修复您的问题。不幸的是，我觉得使用像mysql_*这样的弃用代码是一个坏主意。因此，我为您编写了一个新系统，它将使用PDO代替。{1}}。请仔细阅读代码并编辑nessesary。例如，我不知道您的列名称，因此此代码无法正常运行！

<!DOCTYPE html>
<html>
    <head>
        <title>Pagination</title>
    </head>
    <body>

        <?php

        // Database Settings
        $dbhost = 'localhost';
        $dbuser = '';
        $dbpass = '';
        $dbname = '';

        // Establish Connection to the Database
        $dbh = new PDO('mysql:host='. $dbhost .';dbname='. $dbname, $dbuser, $dbpass, array(
            PDO::ATTR_PERSISTENT => true,
            PDO::ATTR_ERRMODE    => PDO::ERRMODE_EXCEPTION
        ));

        // Selecting the data from table but with limit
        $query = 'SELECT * FROM parent_cat ORDER BY p_cat ASC LIMIT :start, :page';

        // Prepare query
        $pre = $dbh->prepare($query);

        // Binding values
        $pre->bindParam(':start', $start_from);
        $pre->bindParam(':page', $per_page);

        // Results per page
        $per_page=2;

        if (isset($_GET['page'])) {
            $page = $_GET['page'];
        } else {
            $page=1;
        }

        // Page will start from 0 and Multiple by Per Page
        $start_from = ($page-1) * $per_page;

        ?>

        <!-- Start building HTML table -->
        <table>

        <?php

        // Execute query
        try {
            $pre->execute();

            // Fetch all results
            $results = $pre->fetchAll(PDO::FETCH_ASSOC);

            // Loop through results
            foreach($results as $data){

                // Display results in HTML table
                echo "<tr>";

                // Add/Remove your column names here
                echo "<td>". $data['column_name_here'] ."</td>";
                echo "<td>". $data['column_name_here'] ."</td>";
                echo "<td>". $data['column_name_here'] ."</td>";

                // Close HTML table row
                echo "</tr>";
            }
        } catch (PDOException $e) {
            echo 'MySQL query error: ' . $e->getMessage();
        }

        ?>

        <!-- End building HTML table -->
        </table>

        <div>
            <?php

            // Now select all data from table
            $query = 'SELECT * FROM parent_cat';

            // Prepare the query
            $pre = $dbh->prepare($query);

            // Execute the query
            try {
                $pre->execute();

                // Count the results
                $total_records = $pre->rowCount();

                // Keep a record of total number of rows
                $total_rows = $total_records;

                // Using ceil function to divide the total records on per page
                $total_pages = ceil($total_records / $per_page);

                // Going to first page
                echo "<center><a href='pagination.php?page=1'>First Page</a> ";

                // Showing number of pages in between last page
                for ($i=1; $i<=$total_pages; $i++){
                    echo "<a href='pagination.php?page=". $i ."'>". $i ."</a> ";
                }

                // Going to last page
                echo "<a href='pagination.php?page=". $total_pages ."'>Last Page</a></center> ";
            } catch (PDOException $e) {
                echo 'MySQL query error: ' . $e->getMessage();
            }

            // Calculate first and last item on current page
            $first = $page * $per_page - $per_page;
            $last = $page * $per_page;

            // Make sure the number can never be more than the total numer of rows
            if($last > $total_rows){
                $last = $total_rows;
            }

            // Showing the results
            echo "<br />";
            echo "<center>Showing ". $first ." to ". $last ." in total record of ". $total_rows ."</center>";

            ?>

        </div>
    </body>
</html>

我希望使用MySQL LIMIT在分页中显示每页2条记录，

1 个答案: