我点击下一页时无法确定如何保持排序顺序。在该页面上，产品没有按选定的选项排序，这就是问题所在。当点击选项Naziv时，只有首页产品由Naziv排序，当进入下一页时，产品不会被Naziv排序，它们应该是。
我试过：
page=$next&order=$order。但这不能正常工作。
有没有人有一些建议如何解决这个问题。
<html>
<body>
<div>
<div id="container">
<div>
<select name="filter" onchange="window.location.href = 'laptop?order=' + this.value">
<option>Poredaj po: </option>
<option value="naziv">Naziv</option>
<option value="cijenaasc">Cijena Manja-Veća</option>
<option value="cijenadesc">Cijena Veća-Manja</option>
</select>
<form id="Forma" method='post' action="usporedi">
<?php
// 5. record shown amount
$per_page = 10;
// 7. current page
if (!isset($_GET['page'])) {
$page = 1;
} else {
$page = $_GET['page'];
}
// 4. mysql start possition
if ($page <= 1) {
$start = 0;
} else {
$start = $page * $per_page - $per_page;
}
// 2. main sql query
$query = "SELECT *, FORMAT(cijena,2,'de_DE') as cijena FROM artikli WHERE kategorija='laptop'";
$order = isset($_GET['order']) ? $_GET['order'] : '';
if ($order) {
switch ($order) {
case 'cijenaasc':
$order = 'cijena';
$query = "SELECT *, FORMAT(cijena,2,'de_DE') as cijena FROM artikli WHERE kategorija='laptop' ORDER BY CAST(cijena AS DECIMAL(8,2)) ASC ";
break;
case 'naziv':
$order = 'naziv';
$query = "SELECT *, FORMAT(cijena,2,'de_DE') as cijena FROM artikli WHERE kategorija='laptop' ORDER BY naziv ASC ";
break;
case 'cijenadesc':
$order = 'cijena';
$query = "SELECT *, FORMAT(cijena,2,'de_DE') as cijena FROM artikli WHERE kategorija='laptop' ORDER BY CAST(cijena AS DECIMAL(8,2)) DESC ";
break;
}
}
// 7. How much records are in database
$num_rows = mysqli_num_rows(mysqli_query($con, $query));
// 7. How much pages are at all
$num_pages = ceil($num_rows / $per_page);
// 6. Appends limit for shown records
$query .= " LIMIT $start, $per_page";
// 3. Show all records
$result = mysqli_query($con, $query);
while ($row = mysqli_fetch_array($result)) {
$id = $row ['id'];
print
"<div id='proizvod'></br><a style='text-decoration:none; color:black;' class='two' href='proizvod.php?id=$id' >" . $row["naziv"] . "" .
"<p><img src=" . $row["slika"] . " width='200px' height='200px' style='border-radius: 15px;'></p>" .
"<p style='font-size:20px'><b> Cijena za gotovinu: " . $row["cijena"] . " KN </b></p>" .
"<pre id='pre1'>" . $row["opis"] . "</pre>" .
"</a></div>";
}
?>
</form>
</div>
<br/>
<div id="pagination">
<?php
// 8. Prev numbers, next links
$prev = $page - 1;
$next = $page + 1;
// prev
if ($prev > 0) {
echo "<a style='text-decoration:none; color: blue;' href='?page=$prev&order=$order'><b><</b></a> ";
}
//numbers
$number = 1;
for ($number; $number <= $num_pages; $number +=1) {
if ($page == $number) {
echo " <b> $number </b> ";
} else {
echo " <a style='text-decoration:none; color: blue;' href='?page=$number&order=$order'>$number</a> ";
}
}
// next
if ($page < ceil($num_rows / $per_page)) {
echo " <a style='text-decoration:none; color: blue;' href='?page=$next&order=$order'><b>></b></a> ";
}
?>
</div>
</div>
</body>
</html>
答案 0 :(得分：0)
在分页页变量
时保持排序顺序$ order = isset（$ _ GET ['order']）？ $ _GET ['order']：'';
必须在“div id ='pagination'”中。
<html>
<body>
<div id="container">
<?php
$per_page = 10;
if (!isset($_GET['page'])) {
$page = 1;
} else {
$page = $_GET['page'];
}
if ($page <= 1) {
$start = 0;
} else {
$start = $page * $per_page - $per_page;
}
$query = "SELECT *, FORMAT(cijena,2,'de_DE') as cijena FROM artikli WHERE kategorija='smartphone' ORDER BY id ASC ";
// 7. How much records are in database
$num_rows = mysqli_num_rows(mysqli_query($con, $query));
// 7. How much pages are at all
$num_pages = ceil($num_rows / $per_page);
?>
<div id="gumb">
<div id="usporedivanje">
<input type='submit' form='Forma' name='usporedi' disabled='disabled' id='usporedi' value='Usporedi' onmouseover="" style="cursor: pointer;" />
<div id='sortiranje'>
<select id='filter' style="font-size:20px; height:50px; border: 5px solid #099CDB; border-radius: 10px; border-color: #099bcd;" name="filter" onchange="window.location.href = 'smartphone?order=' + this.value">
<option>Poredaj po: </option>
<option value="naziv">Naziv</option>
<option value="cijenaasc">Cijena Manja-Veća</option>
<option value="cijenadesc">Cijena Veća-Manja</option>
</select>
</div>
</div>
<br/>
<form id="Forma" method='post'>
<?php
$order = isset($_GET['order']) ? $_GET['order'] : '';
if ($order) {
switch ($order) {
case 'cijenaasc':
$order = 'cijena';
$query = "SELECT *, FORMAT(cijena,2,'de_DE') as cijena FROM artikli WHERE kategorija='smartphone' ORDER BY CAST(cijena AS DECIMAL(8,2)) ASC ";
break;
case 'naziv':
$order = 'naziv';
$query = "SELECT *, FORMAT(cijena,2,'de_DE') as cijena FROM artikli WHERE kategorija='smartphone' ORDER BY naziv ASC ";
break;
case 'cijenadesc':
$order = 'cijena';
$query = "SELECT *, FORMAT(cijena,2,'de_DE') as cijena FROM artikli WHERE kategorija='smartphone' ORDER BY CAST(cijena AS DECIMAL(8,2)) DESC ";
break;
}
}
$query .= " LIMIT $start, $per_page";
$result = mysqli_query($con, $query);
while ($row = mysqli_fetch_array($result)) {
$id = $row ['id'];
print
"<div id='proizvod'></br><a style='text-decoration:none; color:black; font-size:20px;' class='two' href='proizvod.php?id=$id' ><b>" . $row["naziv"] . "</b>" .
"<p><img src=" . $row["slika"] . " width='200px' height='200px' style='border-radius: 15px;'></p>" .
"<p style='font-size:20px'><b> Cijena za gotovinu: " . $row["cijena"] . " KN </b></p>" .
"<pre id='pre1'>" . $row["opis"] . "</pre>" .
"</a></div>";
}
?>
</form>
<div id="pagination">
<?php
$prev = $page - 1;
$next = $page + 1;
$order = isset($_GET['order']) ? $_GET['order'] : '';
if ($prev > 0) {
echo "<a style='text-decoration:none; font-size:30px; color: #099BCD;' href='?page=$prev&order='$order'><b><</b></a> ";
}
$number = 1;
for ($number; $number <= $num_pages; $number +=1) {
if ($page == $number) {
echo " <b style='font-size:30px; color: #099BCD;'> $number </b> ";
} else {
echo " <a style='text-decoration:none; font-size:30px; color: #099BCD;' href='?page=$number&order=$order'>$number</a> ";
}
}
if ($page < ceil($num_rows / $per_page)) {
echo " <a style='text-decoration:none; font-size:30px; color: #099BCD;' href='?page=$next&order=$order'><b>></b></a> ";
}
?>
</div>
</div>
<?php include "footer.php"; ?>
</body>
</html>