我正在尝试实现分页，我这样做了。问题是当我单击搜索按钮时，会显示搜索结果 没问题。
1st Snap http://www.flickr.com/photos/41695354@N08/4057149857/
第二次拍摄 http://www.flickr.com/photos/41695354@N08/4057149861/当我点击下一个按钮时，它再次从默认情况下为空的所有文本框中获取值，并将查询设置为 select * from rental_ads where city =“”，这是0结果，因此显示'No Results Found'。
第三次拍摄 http://www.flickr.com/photos/41695354@N08/4057149863/如何仅在单击搜索按钮时才能使查询字符串形成？
任何帮助都将受到高度赞赏。
我的代码：
rentals_search.template.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<link rel="stylesheet" type="text/css" href="../css/style.css"> </link>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>RBlog - For the Consumers - By the Sellers</title>
<link href="css/Pager.css" rel="stylesheet" type="text/css" />
<script src="js/jquery-1.2.6.min.js" type="text/javascript"></script>
<script src="js/jquery.pager.js" type="text/javascript"></script>
<script type="text/javascript" language="javascript">
$(document).ready(function() {
$("#pager").pager({ pagenumber: 1, pagecount: 15, buttonClickCallback: PageClick });
});
PageClick = function(pageclickednumber) {
$("#pager").pager({ pagenumber: pageclickednumber, pagecount: 10, buttonClickCallback: PageClick });
//$("#result").html("Clicked Page " + pageclickednumber);
$("#result").html("Clicked Page " + pageclickednumber);
}
gen();
</script>
</head>
<body>
<?php include("includes/header.php"); ?>
<?php include("dbclass/paging_class.php"); ?>
<div class="afterpicer_total">
<?php include("includes/menu.php"); ?>
<div class="wrapper">
<div class="cont">
<?php include("includes/left_menu.php"); ?>
<div class="reg_cont">
<form action="search_results.php" method="GET">
<div class="reg_label">Looking for</div>
<div class="reg_tbox">
<select name="type" class="reg_combo_style">
<option>Living House</option>
<option>Office</option>
</select>
</div><br/>
<div class="reg_label">Rent/Month</div>
<div class="reg_tbox">
<select name="rent" class="reg_combo_style">
<option></option>
<option><2000</option>
<option>2000-4000</option>
<option>4000-6000</option>
<option>6000-10000</option>
<option>>10000</option>
</select>
</div><br/>
<div class="reg_label" >City</div>
<div class="reg_tbox">
<select name="city" class="reg_combo_style" >
<option></option>
<option>Chennai</option>
<option>Salem</option>
<option>Madurai</option>
<option>Trichy</option>
</select>
</div><br/>
<div class="reg_label" >Area</div>
<div class="reg_tbox"><input type="text" size="32" name="area" class="reg_tbox_style" value='<?php echo(htmlspecialchars($_SESSION["lastarea"], ENT_QUOTES)); ?>' ></input></div><br/><br/><br/>
<div class="reg_tbox"><input type="submit" name="subm" value="Search" class="reg_but_style"style="margin-left:155px;"></input></div><br/><br/>
<?php
//doPages(10, '/rentals_search.php', 'city=Madurai', 5);
/*if (isset($_GET['subm'])) {
$_SESSION['searchflag'] = 'on';
}
if(isset($_SESSION['searchflag']))
{
$newpage=new paging();
//$newpage->pager(" SELECT * FROM rentals_ads WHERE city='Salem'");
$type=$_GET[type];
$city=$_GET[city];
$newpage->pager("SELECT * FROM rentals_ads WHERE city='$city'");
} */
?>
<div class="reg_bl"></div>
</form>
</div>
</div>
<div class="adspace"> Advertisement Space</div>
</div>
</div>
<script language="javascript">
function gen()
{
for (var page = 0; page <= 10; page++) {
var currentButton = $('<li class="page-number">' + (page) + '</li>');
<a class="pager" href="/ajax_pages/get_results.php?page=3">page </a>
}
}
</script>
</body>
</html>
paging_class.php
<?php
ob_start();
require_once("common/class.Database.php");
require_once("common/varDeclare.php");
class paging extends Database
{
function pager()
{
$no_results = TRUE; // No results found yet
$howmany = 5; // Return 10 results per query
// Set default starting point of query to 0, or, if set, to $_GET['rs']
$row_start = (isset($_GET['rs'])) ? $_GET['rs'] : 0;
// Do our SQL query, with something like LIMIT 0, 10
$qcity=$_GET[city];
$sql="SELECT * FROM rentals_ads WHERE city='$qcity'";
$result=mysql_query($sql);
while($row = mysql_fetch_array($result))
{
$count=$count+1;
}
if($count>0)
{
echo "$count results found" ;
}
$sql = "SELECT * FROM rentals_ads WHERE city='$qcity' LIMIT ". $row_start .", ". $howmany ."";
$result = mysql_query($sql);
// Get the number of rows that would have been returned WITHOUT a limit clause, to be used later for paging.
$count_sql = "SELECT FOUND_ROWS() AS total";
$count_sql_result = mysql_query($count_sql);
$count_row = mysql_fetch_array($count_sql_result);
$count_result = $count_row['total'];
?>
<div class="paging_title">
<div class="paging_title_title"> Title</div>
<div class="paging_title_type">Room Type</div>
<div class="paging_title_city">City</div>
<div class="paging_title_rent">Rent</div>
</div>
<?
// Start looping through our result set
while($row = mysql_fetch_array($result)) {
$no_results = FALSE;
// Save results of query to $line_output
$line_output .= "
<div class=\"paging_ad\">
<div class=\"paging_ad_title\">". $row['rentals_title'] ."</div>
<div class=\"paging_ad_type\">". $row['rentals_type'] ."</div>
<div class=\"paging_ad_city\">". $row['city'] ."</div>
<div class=\"paging_ad_rent\">". $row['rent'] ."</div>
</div>";
}
// Don't bother building paging if we don't have records
if ($no_results) {
$line_output = "No records found...";
$page_output = "";
}
else {
// Build <prev> and <next> links and save to $page_output
$rs_prev = $row_start - $howmany; // where would prev page start, given current start less no. of records
$rs_next = $row_start + $howmany; // where would next page start, given current start plus no. of records
// If for some reason the next <prev> starting point is negative, do not display <prev>
// This happens when our current starting point is already 0
// This may happen if some smartass manually changes the rs= bit in the url
$page_output_prev = ($rs_prev < 0) ? "" : "<a href='?rs=".$rs_prev."'>Previous</a>";
// Will the next page jump start point exceed the number of records returned?
// If so, don't display <next>'
$page_output_next = ($rs_next <= $count_result) ? "<a href='?rs=".$rs_next."'>Next</a>": "";
// Just something to put between <prev> & <next>, IF they are both active
if (($page_output_prev == ""))
{
$page_output =" <div class=\"paging_nav_cont\">
<div class=\"paging_nav_but\">". $page_output_next ."</div>
</div>";
}
else if (($page_output_next == ""))
{
$page_output =" <div class=\"paging_nav_cont\">
<div class=\"paging_nav_but\">". $page_output_prev ."</div>
</div>";
}
else
{
$page_output =" <div class=\"paging_nav_cont\">
<div class=\"paging_nav_but\">". $page_output_prev ."</div>
<div class=\"paging_nav_but\">". $page_output_next ."</div>
</div>";
}
// Build final paging output
//$page_output = $page_output_prev . $page_output_breaker . $page_output_next;
}
// Write the outputs
echo $line_output;
echo $page_output;
}
}
?>
search_results.template.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>RBlog - For the Consumers - By the Sellers</title>
<?
require_once("common/class.Database.php");
require_once("dbclass/paging_class.php");
?>
</head>
<body>
<?php include("includes/header.php"); ?>
<div class="afterpicer_total">
<?php include("includes/menu.php"); ?>
<div class="wrapper">
<div class="cont">
<?
$newpage=new paging();
//$newpage->pager(" SELECT * FROM rentals_ads WHERE city='Salem'");
$type=$_GET[type];
$city=$_GET[city];
$newpage->pager();
?>
</div>
<div class="adspace"> Advertisement Space</div>
</div>
</div>
</body>
</html>
答案 0 :(得分：0)
$ _SESSION PHP变量可能正是您要找的。它在页面加载之间存储值。 PHP manual
答案 1 :(得分：0)
不，Scavenger是对的，你必须使用$ _SESSION变量。这是让PHP记住上一页加载的唯一方法。
它不适合你的原因可能是因为你没有正确设置它。你必须添加
<?php session_start(); ?>
到要在其中使用$ _SESSION变量的每个PHP文件的开头。然后，你必须编写类似的代码：
if (isset($_GET['city']) {
$qcity = $_GET['city'];
$_SESSION['city'] = $qcity;
} else {
$qcity = $_SESSION['city'];
}
让它记住上一次的城市。
这是解决问题的一种方法，我认为你也可以用AJAX解决问题。如果这样做，则必须确保页面永远不会完全重新加载。这使输入字段保持有效。您可以从Javascript调用PHP文件（包含数据库查询），而不是重新加载，并相应地操作页面。
我会参加PHP会议（但我也很想学习更多的AJAX，它很整洁： - ）。