我有一个搜索按钮，用于搜索类别和产品表。 因此，当页面在第一个下拉列表中加载时显示类别时，我使用2个下拉列表；当用户在第二个下拉列表中选择类别时，则显示该类别中的产品。同样，当页面加载时，运行默认查询，该查询显示所有产品。因此搜索功能运行良好。
问题是我也在使用分页。在搜索之前，分页工作正常（每页15条记录），但是在搜索后，如果我选择一个类别并进行搜索，它将显示该类别的所有记录，当我进入下一页时，它将运行默认查询并显示默认结果。我希望它显示我搜索的结果。
<?php
$listperpage = 15;
$c = $_POST['category'];
$n = $_POST['product'];
if(!empty($c)){
$query = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category WHERE fk_id_category = '$c'";
$result = mysql_query($query) or die (mysql_query());
}
else if(!empty($c) && !empty($n)){
$query = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category WHERE fk_id_category = '$c' AND rank_name = '$n'";
$result = mysql_query($query) or die (mysql_query());
}else{
$query = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category";
$result = mysql_query($query) or die (mysql_query());
echo "else one";
}
$result_num = mysql_num_rows($result);
//total pages
$pages = ceil($result_num/$listperpage);
//which number the user is crrrently on
if (!isset($_GET['page'])) {
$page = 1;
} else{
$page = $_GET['page'];
}
//sql limit starting number of results on th page
$strt_limit_no = ($page - 1)*$listperpage;
if(isset($_POST["search"])){
$c = $_POST['category'];
$n = $_POST['product'];
if(empty($c)){
echo "<span class='form-error'>Select Category first!</span>";
}
else if(!empty($c) && !empty($n)){
$queryn = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category WHERE fk_id_category = '$c' AND rank_name = '$n' LIMIT ". $strt_limit_no .','. $listperpage;
$results = mysql_query($queryn) or die (mysql_query());
}
else{
$queryn = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category WHERE fk_id_category = '$c' LIMIT ". $strt_limit_no .','. $listperpage;
$results = mysql_query($queryn) or die (mysql_query());
}
}
else{
$queryn = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category LIMIT ". $strt_limit_no .','. $listperpage;
$results = mysql_query($queryn) or die (mysql_query());
echo "else end";
}
?>
<script type="text/javascript">
$(document).ready(function() {
$("#category").on('click',function(){
var category = $(this).val();
if(category){
//alert('3213');
$.ajax({
type:'POST',
url:'process.php',
data:'category=' + category,
success:function(html){
$("#product").html(html);
}
});
}
});
});
</script>
<div align="center" class='maintabledivdaily' style='width:100%; padding: 20px 0 15px 0;' >
<table border="1" cellpadding="5" cellspacing="2" width="80%" >
<thead>
<tr>
<th colspan="9" bgcolor="#CCCCCC">List of all Ranks</th>
</tr>
<tr>
<th>ID</th>
<th>Category</th>
<th>Product Name</th>
</tr>
</thead>
<tbody>
<?php while ($row = mysql_fetch_array($results)): ?>
<tr></tr>
<tr align="center" dir="rtl" style="font-style:">
<td><?php echo $row['id']; ?></td>
<td><?php echo $row['category']; ?></td>
<td><?php echo $row['product']; ?></td>
</tr>
<?php endwhile; ?>
</tbody>
</table>
<br>
<div class="pagination">
<?php
for ($page=1; $page <= $pages ; $page++) {
echo '<a style="color: #000000;
float: left;
padding: 8px 16px;
text-decoration: none;
"href="list.php?page='. $page .'">'. $page .'</a> ';
}
?>
</div>
答案 0 :(得分：3)
从发布方式更改为获取方式，您可以在其中选择类别和搜索按钮。
<form method="get"></form>
获取服务器端的类别和其他发布的值。
$c = $_GET['category'];
$n = $_GET['product'];
将这些值添加到分页中
<div class="pagination">
<?php
$cat = $prod = '';
if(!empty($_GET['category'])){ $cat = '&category='.$_GET['category']; }
if(!empty($_GET['product'])){ $prod = '&product='.$_GET['category']; }
for ($page=1; $page <= $pages ; $page++) {
echo '<a style="color: #000000;
float: left;
padding: 8px 16px;
text-decoration: none;
"href="list.php?page='. $page. $cat. $prod .'">'. $page .'</a> ';
}
?>
</div>
注意：如果搜索时未发送'page'参数，则在搜索表单中设置一个名为page的输入。
<input type="hidden" name="page" value="<?php echo $page; ?>"
第二种方法是，您可以将发布的值存储在SESSION中，并在单击新按钮清除搜索后清除会话。
第1步：在“搜索”按钮旁边添加一个新按钮（“清除搜索”）。
第2步：将发布的类别和产品存储到会话中，并在查询中使用此会话。并通过清除搜索按钮销毁会话。
<?php
$listperpage = 15;
$_SESSION['category'] = $_POST['category'];
$_SESSION['product'] = $_POST['product'];
/** clear_search is the name of your clear search button */
if(isset($_POST["clear_search"])){
unset($_SESSION['category']);
unset($_SESSION['product']);
}
if(!empty($_SESSION['category'])){
$query = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category WHERE fk_id_category = ". $_SESSION['category'];
$result = mysql_query($query) or die (mysql_query());
}
else if(!empty($_SESSION['category']) && !empty($_SESSION['product'])){
$query = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category WHERE fk_id_category = " .$_SESSION['category']. " AND rank_name = ". $_SESSION['product'];
$result = mysql_query($query) or die (mysql_query());
}else{
$query = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category";
$result = mysql_query($query) or die (mysql_query());
echo "else one";
}
$result_num = mysql_num_rows($result);
//total pages
$pages = ceil($result_num/$listperpage);
//which number the user is crrrently on
if (!isset($_GET['page'])) {
$page = 1;
} else{
$page = $_GET['page'];
}
//sql limit starting number of results on th page
$strt_limit_no = ($page - 1)*$listperpage;
if(isset($_POST["search"])){
if(empty($_SESSION['category'])){
echo "<span class='form-error'>Select Category first!</span>";
}
else if(!empty($_SESSION['category']) && !empty($_SESSION['product'])){
$queryn = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category WHERE fk_id_category = " .$_SESSION['category']. " AND rank_name = " . $_SESSION['product'] . " LIMIT ". $strt_limit_no .','. $listperpage;
$results = mysql_query($queryn) or die (mysql_query());
}
else{
$queryn = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category WHERE fk_id_category = " .$_SESSION['category']. " LIMIT ". $strt_limit_no .','. $listperpage;
$results = mysql_query($queryn) or die (mysql_query());
}
}
else{
$queryn = "SELECT * FROM tbl_category INNER JOIN tbl_product ON tbl_category.id = tbl_product.fk_id_category LIMIT ". $strt_limit_no .','. $listperpage;
$results = mysql_query($queryn) or die (mysql_query());
echo "else end";
}
?>