Question

<?php
      if(isset($_REQUEST['searchcat']))
  {
        $search_category = $_REQUEST['searchcat'];
        switch($search_category)
        {
            case 'Purchase':
                $city      = mysql_real_escape_string($_REQUEST['city']);
                $location  = mysql_real_escape_string($_REQUEST['location']);
                $bedrooms  = mysql_real_escape_string($_REQUEST['noofbedrooms']);
                $addeddate = mysql_real_escape_string($_REQUEST['addeddate']);
                $minprice  = mysql_real_escape_string($_REQUEST['pricefrom']);
                $maxprice  = mysql_real_escape_string($_REQUEST['priceto']);
                $minarea   = mysql_real_escape_string($_REQUEST['areafrom']);
                $maxarea   = mysql_real_escape_string($_REQUEST['areato']);
                $proptype   = mysql_real_escape_string($_REQUEST['proptype']);
                $addeddate = date($addeddate * 24 * 60 * 60);
                $query = 'SELECT image,propertytitle,propertypurpose,propertytype,city,id FROM properties WHERE 1 = 1 AND propertypurpose = "Purchase" ';
                $query .= strlen($city)     ? ' AND city = "'.$city.'"'         : '';
                $query .= strlen($location) ? ' AND location = "'.$location.'"' : '';
                $query .= strlen($bedrooms) ? ' AND bedrooms = "'.$bedrooms.'"' : '';
                if($addeddate!=0)
                    $query .= strlen($addeddate) ? ' AND dateadded >= "FROM_UNIXTIME('.$addeddate.')"' : '';
                $query .= strlen($minprice) ? ' AND price between "'.$minprice.'"' : '';
                $query .= strlen($maxprice) ? ' AND "'.$maxprice.'"' : '';
                $query .= strlen($minarea) ? ' AND landarea between "'.$minarea.'"' : '';
                $query .= strlen($maxarea) ? ' AND "'.$maxarea.'"' : '';
                $query .= strlen($proptype) ? ' AND propertytype = "'.$proptype.'"' : '';
                $getSearchRowsQuery = explode('properties',$query);
                $getSearchRowsQuery = 'SELECT COUNT(id) As numrows FROM properties' . $getSearchRowsQuery[1];
                break;
            case 'rentals':
                break;
            case 'agents':
                break;
            case 'developments':
                break;
            default:
        }
    }
    $classObject = new class_functions();
    $rowsPerPage = 2;
    // by default we show first page
    $pageNum = 1;
    // if $_GET['page'] defined, use it as page number
    if(isset($_GET['page']))
    {
        $pageNum = $_GET['page'];
    }
    // counting the offset
    $offset = ($pageNum - 1) * $rowsPerPage;
    if(!isset($_REQUEST['searchcat']))
    {
        if(!isset($_REQUEST['page']))
        {
            $query = '';
            session_destroy($_SESSION['searchquery']);
            session_destroy($_SESSION['searchcount']);
        }
        else 
            $query = $_SESSION['searchquery'];
    }
else 
{
    session_destroy($_SESSION['searchquery']);
    session_destroy($_SESSION['searchcount']);
}
if(isset($_SESSION['searchquery']))
    $query = $_SESSION['searchquery'];
$tmpquery = $query . ' LIMIT ' . $offset . ', ' .$rowsPerPage;
echo $tmpquery;
$listings[] = $classObject->getSearchListings($tmpquery,$offset,$rowsPerPage);
for($i=0;$i<sizeof($listings[0]);$i++) {
    if($i%2==0)
        echo '<tr class="oddrow">';
    else
        echo '<tr>';
?>
    <td class="colimage">
            <?php if($listings[0][$i][0]=="") {?>
            <a href="#"><img src="images/no-image.png" alt="no image" /></a>
                            <?php } else {?>
                                <a href="#"><img src="<?php echo $listings[0][$i][0]; ?>" alt="<?php echo $featured[0][$i][1]; ?>" /></a><?php }?>
                        </td>
                        <td class="coltitle"><?php echo $listings[0][$i][1]; ?></td>
                        <td class="colpurpose"><?php echo $listings[0][$i][2]; ?></td>
                        <td class="coltype"><?php echo $listings[0][$i][3]; ?></td>
                        <td class="colcity"><?php echo $listings[0][$i][4]; ?></td>
                    </tr>

                    <?php } ?>
                 </table>
                    <?php
                        //echo $getSearchRowsQuery;
                        if(!isset($_SESSION['searchcount']))
                            $numrows = $classObject->get_search_rows($getSearchRowsQuery);
                        else 
                            $numrows = $_SESSION['searchcount'];
                        if($numrows==0)
                        {
                            echo 'No records found.';
                        }
                        else 
                        {
                            // how many pages we have when using paging?
                            $maxPage = ceil($numrows/$rowsPerPage);

                            // print the link to access each page
                            $self = $_SERVER['PHP_SELF'];
                            $nav  = '';

                            for($page = 1; $page <= $maxPage; $page++)
                            {
                               if ($page == $pageNum)
                               {
                                  $nav .= " $page "; // no need to create a link to current page
                               }
                               else
                               {
                                  $nav .= " <a href=\"$self?page=$page\">$page</a> ";
                                  $_SESSION['searchquery'] = $query;
                                  $_SESSION['searchcount'] = $numrows;
                               }
                            }
                            if ($pageNum > 1)
                            {
                               $page  = $pageNum - 1;
                               $prev  = " <a href=\"$self?page=$page\">[Prev]</a> ";

                               $first = " <a href=\"$self?page=1\">[First Page]</a> ";
                            }
                            else
                            {
                               $prev  = '&nbsp;'; // we're on page one, don't print previous link
                               $first = '&nbsp;'; // nor the first page link
                            }

                            if ($pageNum < $maxPage)
                            {
                               $page = $pageNum + 1;
                               $next = " <a href=\"$self?page=$page\">[Next]</a> ";

                               $last = " <a href=\"$self?page=$maxPage\">[Last Page]</a> ";
                            }
                            else
                            {
                               $next = '&nbsp;'; // we're on the last page, don't print next link
                               $last = '&nbsp;'; // nor the last page link
                            }
                        }
                    ?>

我的问题是如何使用会话在下一页重复查询。即如果页面超过1页的结果，我想存储查询。基本上市。我无法弄清楚存储查询的逻辑，并检查第一次加载页面的条件或是否继续搜索结果。

抱歉格式不正确。

Answer 1

嗯，ASP为每个页面定义了属性IsPostBack，它回答了你之前是否已加载页面的问题。您可以通过创建存储在$ _SESSION ['bl']中的自定义商务类实例来使用相同的技术，并检查$ _SESSION ['bl']是否为空。在该类中，您可以定义存储查询和其他所需参数的属性。然后，您将获得所需的所有信息，并可以从那里开始

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