Question

因此，出于某种原因，我试图找出为什么我的分页不能正常工作。我让它从第1页移到第2页但由于某种原因它不会转到第3页。我检查了来自DB的查询是否正确，并且不确定我哪里出错了。

$per_page = '4';

$tenure_sql =  'SELECT COUNT(id) as count
                FROM people.bywu
                WHERE type <> 0
                AND status = "approved"';

$tenure_query = mysql_query( $tenure_sql, DB );

$tenure_count = mysql_fetch_object( $tenure_query );
$tenure_count = $tenure_count -> count;
$tenure_pages = ceil( $tenure_count / $per_page );

<div class="pagination" id="tenure_pages">
<a href="" class="lt grayed">&lt;</a>
Stories <span id="tenure_low" class="current_low"><?= $tenure_count ? '1':'0' ?></span>-<span id="tenure_high" class="current_high"><?= $tenure_count > 4 ? $per_page : $tenure_count ?></span> of <span class="total"><?= $tenure_count ?></span>
<a href="" class="gt<?= $tenure_count < 5 ? ' grayed':'' ?>">&gt;</a>
<span class="pages" style="display:none;"><?= $tenure_pages ?></span>
<?
    for( $i = 1; $i < $tenure_pages + 1; $i++ )
    {
    echo '<a href="">' . $i . '</a> ';
    } // for
?>

Answer 1

从kohana分页课程中删除，我认为如果你对php课程有任何基础知识，你会发现它很有用。

用法：

$pager = Pagination::factory(array('current_page' => $_GET['page'], 'total_items' => $total_items, 'items_per_page' => 20));

if ($pager->next_page) { /* etc.......*/ }

<?php
class Pagination {


    protected $config = array(
            'current_page'      => 1,
        'total_items'       => 0,
        'items_per_page'    => 10
    );

    // Current page number
    protected $current_page;

    // Total item count
    protected $total_items;

    // How many items to show per page
    protected $items_per_page;

    // Total page count
    protected $total_pages;

    // Item offset for the first item displayed on the current page
    protected $current_first_item;

    // Item offset for the last item displayed on the current page
    protected $current_last_item;

    // Previous page number; FALSE if the current page is the first one
    protected $previous_page;

    // Next page number; FALSE if the current page is the last one
    protected $next_page;

    // First page number; FALSE if the current page is the first one
    protected $first_page;

    // Last page number; FALSE if the current page is the last one
    protected $last_page;

    // Query offset
    protected $offset;

    /**
     * Creates a new Pagination object.
     *
     * @param   array  configuration
     * @return  Pagination
     */
    public static function factory(array $config = array())
    {
        return new Pagination($config);
    }

    /**
     * Creates a new Pagination object.
     *
     * @param   array  configuration
     * @return  void
     */
    public function __construct(array $config = array())
    {


        // Pagination setup
        $this->setup($config);

    }



    /**
     * Loads configuration settings into the object and (re)calculates pagination if needed.
     * Allows you to update config settings after a Pagination object has been constructed.
     *
     * @param   array   configuration
     * @return  object  Pagination
     */
    public function setup(array $config = array())
    {


        // Only (re)calculate pagination when needed
        if ($this->current_page === NULL
            OR isset($config['current_page'])
            OR isset($config['total_items'])
            OR isset($config['items_per_page']))
        {

            // Calculate and clean all pagination variables
            $this->current_page = (int) $this->config['current_page'];
            $this->total_items        = (int) max(0, $this->config['total_items']);
            $this->items_per_page     = (int) max(1, $this->config['items_per_page']);
            $this->total_pages        = (int) ceil($this->total_items / $this->items_per_page);
            $this->current_page       = (int) min(max(1, $this->current_page), max(1, $this->total_pages));
            $this->current_first_item = (int) min((($this->current_page - 1) * $this->items_per_page) + 1, $this->total_items);
            $this->current_last_item  = (int) min($this->current_first_item + $this->items_per_page - 1, $this->total_items);
            $this->previous_page      = ($this->current_page > 1) ? $this->current_page - 1 : FALSE;
            $this->next_page          = ($this->current_page < $this->total_pages) ? $this->current_page + 1 : FALSE;
            $this->first_page         = ($this->current_page === 1) ? FALSE : 1;
            $this->last_page          = ($this->current_page >= $this->total_pages) ? FALSE : $this->total_pages;
            $this->offset             = (int) (($this->current_page - 1) * $this->items_per_page);
        }

        // Chainable method
        return $this;
    }


    /**
     * Returns a Pagination property.
     *
     * @param   string  property name
     * @return  mixed   Pagination property; NULL if not found
     */
    public function __get($key)
    {
        return isset($this->$key) ? $this->$key : NULL;
    }

    /**
     * Updates a single config setting, and recalculates pagination if needed.
     *
     * @param   string  config key
     * @param   mixed   config value
     * @return  void
     */
    public function __set($key, $value)
    {
        $this->setup(array($key => $value));
    }

} // End Pagination

 ?>

Answer 2

除非您从数据库中获取的count()为9或更大，否则您永远不会看到3。

   ceil(0/4) -> 0
   ...
   ceil(8/4) -> 2
   ceil(9/4) -> 3

那么......数据库中有多少篇文章符合您查询中的条件？

您没有展示如何在代码中传递“当前页面”计数，那么代码如何知道您当前在哪个页面？

$total_pages = 8;
$current_page = $_GET['curPage'];

for ($i = 1; $i <= $total_pages; $i++) {
   $class = ($i == $current_page) ? ' class="current"' : '';
   echo <<<EOL
<a href="page.php?curPage=$i"$class>$i</a>

EOL;
}

PHP分页问题

2 个答案: