我有一个问题与分页脚本，我在互联网上找到，但再也找不到确切的一个。
问题是，单击菜单上的“上一页/下一页”或任何页码都不会显示下一组值，可能是select语句中的限制偏移量没有发挥应有的作用，但我不确定原因。 jobs.php?action=listActiveJob&page=1&ipp （ipp在下面的分页器lcass中为5），当单击next（下一步）或第2页（例如url更改为）时，将按预期显示前5个 jobs.php?action=listActiveJob&page=2&ipp=5 但同样的5个结果显示。
php包含许多控制多个页面的代码，但下面是控制此列表的代码

function listActiveJob() { 
  $results = array();
  $data = Job::getActiveList();
  $results['activejobs'] = $data['results'];
  $results['totalRows'] = $data['totalRows'];
  require( TEMPLATE_PATH . "/job/listActiveJob.php" );
}

在另一个文件（job.php）中，下面是 $data = Job::getActiveList(); ```
public static function getActiveList() {
$conn = new PDO( DB_DSN, DB_USERNAME, DB_PASSWORD );

$pages = new Paginator;
$pages->items_total = 50;
$pages->paginate();

$sql = "SELECT SQL_CALC_FOUND_ROWS job_code, job_id, job_status, job_quoteid, job_contactid, job_companyid, job_schedulestatus, job_schedulestatus2, job_schedulestatus3
        FROM jobs WHERE job_status='Active'
        ORDER BY job_id DESC ".$pages->limit;

$st = $conn->prepare( $sql );
$st->execute(); 
$list = array();

while ( $row = $st->fetch() ) {
  $job = new Job( $row );
  $list[] = $job;
}
$sql = "SELECT FOUND_ROWS() AS totalRows";
$totalRows = $conn->query( $sql )->fetch();

$conn = null;
return ( array ( "results" => $list, "totalRows" => $totalRows[0] ) );

}

该列表位于listactivejob.php中，是一个简单的foreach

下面是listactivejob.php底部的代码，用于显示和控制分页。

function Paginator()
{
    $this->current_page = 1;
    $this->mid_range = 25;
    $this->items_per_page = (!empty($_GET['ipp'])) ? $_GET['ipp']:$this->default_ipp;
}

function paginate()
{
    if(isset($_GET['ipp'])){
      if($_GET['ipp'] == 'All')
      {
          $this->num_pages = ceil($this->items_total/$this->default_ipp);
          $this->items_per_page = $this->default_ipp;
      }
      else
      {
          if(!is_numeric($this->items_per_page) OR $this->items_per_page <= 0) $this->items_per_page = $this->default_ipp;
          $this->num_pages = ceil($this->items_total/$this->items_per_page);
      }
    }
    $this->current_page = (int) isset($_GET['page']); // must be numeric > 0
    if($this->current_page < 1 Or !is_numeric($this->current_page)) $this->current_page = 1;
    if($this->current_page > $this->num_pages) $this->current_page = $this->num_pages;
    $prev_page = $this->current_page-1;
    $next_page = $this->current_page+1;

    if($this->num_pages > 10) 
    {
        $this->return = ($this->current_page != 1 And $this->items_total >= 10) ? "<a class=\"paginate\" href=\"$_SERVER[PHP_SELF]?$_GET[action]&page=$prev_page&ipp=$this->items_per_page\"> << Previous</a>    ":"<span class=\"inactive\" href=\"#\"><< Previous</span> ";

        $this->start_range = $this->current_page - floor($this->mid_range/2);
        $this->end_range = $this->current_page + floor($this->mid_range/2);

        if($this->start_range <= 0)
        {
            $this->end_range += abs($this->start_range)+1;
            $this->start_range = 1;
        }
        if($this->end_range > $this->num_pages)
        {
            $this->start_range -= $this->end_range-$this->num_pages;
            $this->end_range = $this->num_pages;
        }
        $this->range = range($this->start_range,$this->end_range);

        for($i=1;$i<=$this->num_pages;$i++)
        {
            if($this->range[0] > 2 And $i == $this->range[0]) $this->return .= " ... ";
            // loop through all pages. if first, last, or in range, display
            if($i==1 Or $i==$this->num_pages Or in_array($i,$this->range))
            {
                $this->return .= ($i == $this->current_page And $_GET['page'] != 'All') ? "<a title=\"Go to page $i of $this->num_pages\" class=\"current\" href=\"#\">$i</a> ":"<a class=\"paginate\" title=\"Go to page $i of $this->num_pages\" href=\"$_SERVER[PHP_SELF]?action=$_GET[action]&page=$i&ipp=$this->items_per_page\">$i</a> ";
            }
            if($this->range[$this->mid_range-1] < $this->num_pages-1 And $i == $this->range[$this->mid_range-1]) $this->return .= " ... ";
        }
        $this->return .= (($this->current_page != $this->num_pages And $this->items_total >= 10) And ($_GET['page'] != 'All')) ? "<a class=\"paginate\" href=\"$_SERVER[PHP_SELF]?action=$_GET[action]&page=$next_page&ipp=$this->items_per_page\">Next >></a>\n":"<span class=\"inactive\" href=\"#\"> >> Next</span>\n";
        $this->return .= ($_GET['page'] == 'All') ? "<a class=\"current\" style=\"margin-left:10px\" href=\"#\">All</a> \n":"<a class=\"paginate\" style=\"margin-left:10px\" href=\"$_SERVER[PHP_SELF]?action=$_GET[action]&page=1&ipp=All\">All</a> \n";
    }
    else
    {
        for($i=1;$i<=$this->num_pages;$i++)
        {
            $this->return .= ($i == $this->current_page) ? "<a class=\"current\" href=\"#\">$i</a> ":"<a class=\"paginate\" href=\"$_SERVER[PHP_SELF]?action=$_GET[action]&page=$i&ipp=$this->items_per_page\">$i</a> ";
        }
        $this->return .= "<a class=\"paginate\" href=\"$_SERVER[PHP_SELF]?action=$_GET[action]&page=1&ipp=All\">All</a> \n";
    }
    $this->low = ($this->current_page-1) * $this->items_per_page;
    if(isset($_GET['ipp'])){$this->high = ($_GET['ipp'] == 'All') ? $this->items_total:($this->current_page * $this->items_per_page)-1;}
    if(isset($_GET['ipp'])){$this->limit = ($_GET['ipp'] == 'All') ? "":" LIMIT $this->low,$this->items_per_page";}
}

function display_items_per_page()
{
    $items = '';
    $ipp_array = array(10,25,50,100,'All');
    foreach($ipp_array as $ipp_opt)    $items .= ($ipp_opt == $this->items_per_page) ? "<option selected value=\"$ipp_opt\">$ipp_opt</option>\n":"<option value=\"$ipp_opt\">$ipp_opt</option>\n";
    return "<span class=\"paginate\">Items per page:</span><select class=\"paginate\" onchange=\"window.location='$_SERVER[PHP_SELF]?action=$_GET[action]&page=1&ipp='+this[this.selectedIndex].value;return false\">$items</select>\n";
}

function display_jump_menu()
{
    for($i=1;$i<=$this->num_pages;$i++)
    {
        $option .= ($i==$this->current_page) ? "<option value=\"$i\" selected>$i</option>\n":"<option value=\"$i\">$i</option>\n";
    }
    return "<span class=\"paginate\">Page:</span><select class=\"paginate\" onchange=\"window.location='$_SERVER[PHP_SELF]?action=$_GET[action]&page='+this[this.selectedIndex].value+'&ipp=$this->items_per_page';return false\">$option</select>\n";
}

function display_pages()
{
    return $this->return;
}
}
?>

我希望我已经解释得足够好，非常感谢任何帮助我在正确的方向