so I'm having some issues with a pagination script I have been building The pagination works fine however when i load a new page using the next button, my search term $search_term = "%" . $_POST['searchBar'] . "%"; is lost. is there any way to avoid this? or set the search term as a set value?
the url for the next page is like so - http://examplewebsite.com/user/Courses/SearchResultsPage.php?pn=2
Any help with this would be greatly appreciated.
The rest of the pagination script is below;
<?php
$mysqli = new mysqli('localhost', 'user', 'password','db');
if ($mysqli->connect_errno)
{
die('Database connection failed');
}
//$m->set_charset('utf8');
//here are my main changes
//turn errors on to develop, back off when you go live
error_reporting(E_ALL);
ini_set('display_errors', 1);
$search_term = "%" . $_POST['searchBar'] . "%";
$search_param = $_SESSION['$search_term']=$search_term;
$stmt =$mysqli->prepare("SELECT title, summary, id FROM course WHERE title
LIKE ?");
$stmt->bind_param("s", $search_param); //learn this
$stmt->execute();
$result = $stmt->get_result();
//This gets the number of rows in a query result
$rows = $result->num_rows;
//number of results per page
$rows_per_page = 10;
//shows last page
$last_page = ceil($rows/$rows_per_page);
if($last_page < 1){
$last_page = 1;
}
if(isset($_GET['pn'])){
$page_number = preg_replace('#[^0-9]#', '', $_GET['pn']);
} else {
$page_number = 1;
}
//makes sure page number is between limits of $page_number
if($page_number < 1){
$page_number = 1;
} else if($page_number > $last_page){
$page_number = $last_page;
}
// sets the value of items to view
$limit = 'LIMIT ' .($page_number -1) * $rows_per_page .',' .$rows_per_page;
//displays to the user the total number of results and the page numbers
$total_number_of_results = "Search Results (<b>$rows</b>)";
$page_user_is_on = "Page <b>$page_number</b> of <b>$last_page</b>";
//query again only grabbing the set number of rows depending on page number
$stmt = $mysqli->prepare("SELECT title, summary, id FROM course WHERE title LIKE ? ".$limit);
$stmt->bind_param("s", $search_param);
$stmt->execute();
$result = $stmt->get_result();
$list = '';
while($row = $result->fetch_assoc()){
$title = $row['title'];
$id = $row['id'];
//I'm assuming you want each link to be different here...
$list.='<p>' . $title . '</p>';
}
mysqli_close($mysqli);
//set up pagination
$pagination_controls = '';
if($last_page != 1){
if($page_number > 1){
$previous = $page_number - 1;
$pagination_controls .='previous ';
for($i = $page_number - 4; $i < $page_number; $i++)
{
if($i > 0){
$pagination_controls .= ''.$i.' ';
}
}
}
$pagination_controls.=''.$page_number.' ';
//clickable links to the left
for($i = $page_number+1; $i <= $last_page; $i++)
{
$pagination_controls .= ''.$i.' ';
if($i >= $page_number+4){
break;
}
}
if($page_number != $last_page){
$next = $page_number + 1;
$pagination_controls.=' Next';
}
}
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<link rel='stylesheet' href='courses.css'>
</head>
<body>
<div class="header">
<h1>Search Results for - <?= $search_param ?></h1>
</div>
<div>
<h3> <?php echo $page_user_is_on ?> </h3>
<p><?php echo $list; ?></p>
<p><?php /* echo $search_result['summary']; //Where was this coming from? */?> </p>
</div>
<div id="pagination_controls"><?php echo $pagination_controls; ?></div>
</body>
</html>
Every time you click next, the page refreshes and since you dont use
<?php
session_start();
....
Replace these 2 lines
$search_term = "%" . $_POST['searchBar'] . "%";
$search_param = $_SESSION['$search_term']=$search_term;
with:
if(isset( $_POST['searchBar'])){
$search_term = "%" . $_POST['searchBar'] . "%";
$search_param = $_SESSION['search'] = $search_term ;
}
else {
$search_param = $_SESSION['search'];
}
at the top,$_SESSION['$search_term'] is lost
Also add an isset check for your POST
EDIT
I think your problem is that $search_term is set only on load then on the next page it is NULL and session is also set to NULL.
Related
I have a little script that have a Previous & Next button.
My problem is I want to detect & place the ID in those buttons
this is the code from the pagination
<body>
<?php include_once 'data.php'; ?>
<center>
<ul class="pagination">
<?php
if($page_counter == 0){
echo "<li><a href=?start='0' class='active'>0</a></li>";
for($j=1; $j < $paginations; $j++) {
echo "";
}
}else{
echo "<a href=?start=$previous><button>Previous</button></a>";
for($j=0; $j < $paginations; $j++) {
if($j == $page_counter) {
echo " ";
}else{
echo " ";
}
}if($j != $page_counter+1)
echo "<a href=?start=$next><button>Next</button></a>";
}
?>
</ul>
</center>
In this part I have the ID but the problem is I can`t get it with this example to place it into the pagination.
<?php
foreach($result as $row) {
echo '
<div class="card"><button1>
'. $row['notice_id'] .'
<div class="time-left">
<div class="dropdown1">
' ;
}
}
else {
echo '';
}
$conn->close();
?>
</div></div>
This is the code from data.php I think I need to place some code into for detection from the ID
<?php
//include configuration file
require 'configuration.php';
$start = 0; $per_page = 1;
$page_counter = 0;
$next = $page_counter + 1;
$previous = $page_counter - 1;
if(isset($_GET['start'])){
$start = $_GET['start'];
$page_counter = $_GET['start'];
$start = $start * $per_page;
$next = $page_counter + 1;
$previous = $page_counter - 1;
}
// query to get messages from messages table
$q = "SELECT * FROM group_notice LIMIT $start, $per_page";
$query = $db->prepare($q);
$query->execute();
if($query->rowCount() > 0){
$result = $query->fetchAll(PDO::FETCH_ASSOC);
}
// count total number of rows in students table
$count_query = "SELECT * FROM group_notice";
$query = $db->prepare($count_query);
$query->execute();
$count = $query->rowCount();
// calculate the pagination number by dividing total number of rows with per page.
$paginations = ceil($count / $per_page);
?>
You can use some formulas for calculate limit and offset of results.
For example you have 100 records, and you want to paginate it into 10 records per page, and the formula is like below.
// Get Page from Query String
$page = 1;
if(!empty($_GET["page"])){
$page = $_GET["page"];
}
// Get record count
$count_query = "SELECT * FROM group_notice";
$query = $db->prepare($count_query);
$query->execute();
$count = $query->rowCount();
$per_page = 10; // records per page
$pages = ceil($count/$per_page); // get total page
$start = $page * $per_page - $per_page; // get offset
// Do something with your records
$query = db->prepare("SELECT * FROM group_notice LIMIT ?, ?");
$query->bind_param("ii", $start, $per_page); // you should use bind param if you use prepared statement
$query->execute();
if($query->rowCount() > 0){
$result = $query->fetchAll(PDO::FETCH_ASSOC);
}
if($page > 1){
echo 'Prev'; // Print Prev Page
}
for($i = 1; $i <= $pages){
echo ''.$i.''; // Print Page Number
}
if($page < $pages){
echo 'Next'; // Print Next Page
}
Hope it helps.
ok si im not very fimiliar with PDO im just starting off, could someone help me here why my results will not display? the pages are working but no data would show ..
<?php
require_once 'db/_db.php';
$stmt = $db->prepare("SELECT * FROM article");
$stmt->execute();
$result = $stmt->fetchAll();
$total_rows = $stmt->rowCount();
//$allRecords = mysql_query('select * from article');
//$total_rows = mysql_num_rows($allRecords);
//$base_url = 'https://localhost/pagi/'; //
global $per_page;
$num_links = 4;
$total_rows = $total_rows;
$cur_page = 1;
if(isset($_GET['page']))
{
$cur_page = $_GET['page'];
$cur_page = ($cur_page < 1)? 1 : $cur_page; //if page no. in url is less then 1 or -ve
}
$offset = ($cur_page-1)*$per_page; //setting offset
$pages = ceil($total_rows/$per_page);
$start = (($cur_page - $num_links) > 0) ? ($cur_page - ($num_links - 1)) : 1;
$end = (($cur_page + $num_links) < $pages) ? ($cur_page + $num_links) : $pages;
//$res = mysql_query("SELECT * FROM article ORDER BY id DESC LIMIT ".$per_page." OFFSET ".$offset);
$stm = $db->prepare("SELECT * FROM article ORDER BY id DESC LIMIT ".$per_page." OFFSET ".$offset);
$stm->execute();
$res = $stm->fetchAll();
$rows = $stm->rowCount();
if($rows < 1){
header("Location: news-events.php");
exit;
}
if(is_resource($result))
{
foreach( $res as $row ) {
$desc = $row["ne_article"];
$img = $row['ne_image'];
if(!empty($img)){
$img = '<br/><img src="uploads/images/'.$img.'" alt="" class="responsive-shrink">';
}else{
$img = '';
}
$youtube = $row["ne_youtube"];
if(!empty($youtube)){
$youtube = '<br/><div class="video-container"><iframe src="http://www.youtube.com/embed/'.$youtube.'"></iframe></div>';
}else{
$youtube = '';
}
//shortenString($row['ne_article']);
?>
<h4><?php echo $row['ne_title']; ?></h4>
<h5><b>Views:</b> <?php echo $row['views']; ?>, <b>Posted on:</b> <?php echo format_date($row['created']); ?></h5>
<?php echo $img; ?>
<?php echo $youtube; ?>
<p>
<br/><?php echo bbcode(nl2br(shortenString($desc))); ?>
</p>
<div id="pagelink">
Read more...</button>
</div>
<?php
}
}
?>
<div id="pagination">
<div id="pagiCount">
<br/><br/>
<?php
if(isset($pages))
{
if($pages > 1)
{ if($cur_page > $num_links) // for taking to page 1 //
{ $dir = "First";
echo '<span id="prev"> '.$dir.' </span>';
}
if($cur_page > 1)
{
$dir = "Prev";
echo '<span id="prev"> '.$dir.' </span>';
}
for($x=$start ; $x<=$end ;$x++)
{
echo ($x == $cur_page) ? '<strong>'.$x.'</strong> ':''.$x.' ';
}
if($cur_page < $pages )
{ $dir = "Next";
echo '<span id="next"> '.$dir.' </span>';
}
if($cur_page < ($pages-$num_links) )
{ $dir = "Last";
echo ''.$dir.' ';
}
}
}
?>
would really appreciate your time and help
You are doing nearly everything wrong. And you did with old mysql as well
To get the number of records in database you should never select all the rows, nor fetch them. You have to select the count already.
$total_rows = $pdo->query("SELECT count(1) FROM article")->fetchColumn();
is how it have to be done with PDO.
Besides, for the other query you should use prepared statements.
Finally, you have to take out all the useless verifications and start with foreach right away:
$stm = $db->prepare("SELECT * FROM article ORDER BY id DESC LIMIT ?,?");
$stm->execute([$offset,$per_page]);
$res = $stm->fetchAll();
foreach( $res as $row ) {
And read up on setting the error mode properly here.
check if you have problem with the quotes... when you echo html code inside ' ' if you have " " and again inside '' like this example echo ' " '' " ' you will have problem. you should use \' in order to avoid these problem here echo ' '.$dir.' ';
I tried so many different solutions. Im new to php since 1 week, used ASP 12 years ago so I hope I can get some help.
Everything down here works fine. But there are around 1000 rows in the db and I need to split them up in pages.
<?php
$con = mysqli_connect("localhost","test","test","test")or die('could not connect to database');
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
echo "<table border='0'>
<tr>
<th>Img:</th>
<th>Text:</th>
</tr>";
$result = mysqli_query($con,"SELECT Jokes.ID, Categories.CategoryName, Jokes.CategoryID, Jokes.JokeText FROM Jokes LEFT JOIN Categories ON Jokes.CategoryID = Categories.ID ORDER BY Jokes.JokeText");
while($row = mysqli_fetch_array($result))
{
echo "<tr>";
echo "<td align='center'><img src='webimg/" . $row['CategoryName'] . ".png' height='35' width='35'></td>";
echo "<td align='left' width='80%'>" . $row['JokeText'] . "</td>";
echo "</tr>";
}
echo "</table>";
mysql_close($con);
?>
Kind Regards.
You can use MySQL LIMIT for that.
I've used to do it like this:
Get the total number of rows you're paging and have a parameter like in the URL, i.e. "/p/5" or ?page=5 (I will use this for reference, easier to write code and for you to understand) for page no. 5, also do a failsafe, like this:
Say you have 10 records per page:
$page = isset($_GET['page']) ? (int) $_GET['page'] : 1;
$records_per_page = 10;
And, in your SQL you will have something like this
$start = ($page-1) * $records_per_page;
$result = mysql_query("select * from table limit {$start}, {$records_per_page}");
Kind of crude, but you should get the point and be on the right path.
For building your pagination links... that's totally up to you. You should get the total amount of rows with a "select count (PRIMARY_KEY) from table" query prior, so you can calculate the max number of pages.
What you're searching for is the LIMIT of mysql.
The usage is very simple.
For example:
"SELECT * FROM tablename LIMIT 3"
This will give you the first three results.
In your case, you need an offset, depends on the current page:
"SELECT * FROM tablename LIMIT offset,results"
The offset can be calculated, depends on how many results you want each page.
"SELECT * FROM tablename LIMIT 20,10"
This will display 10 results, start at result 20. This could be for the 3. site if you want 10 results each site.
<?php
$per_page = 10; //no. of results to display in one page
$pages_query = mysql_query("SELECT COUNT('id') FROM JOKES");//Or whatever field. this is just to check the number of results.
$pages = ceil(mysql_result($pages_query, 0) / $per_page);//to get the total no. of pages that will be there. For example if u have 60 results than no. og pages will be 60/10=6
$page = (isset($_GET['page'])) ? (int)$_GET['page'] : 1;// if the page variable in your url is set that means that u have clicked a page number. So it will be taking that page number and displaying those results
$start = ($page - 1) * $per_page;//to get the starting result of that page. If you are in say 6th page, then the starting element would be 6-1*10=50. This makes sure that the results in the previous pages are not displayed
$query = mysql_query("SELECT * FROM JOKES LIMIT $start, $per_page");//set the limit of results that page
while($query_row = mysql_fetch_assoc($query)){
echo " ur table names ";
}
$prev = $page - 1;//to set the prev page variable
$next = $page + 1;//to set the next page variable
if(!($page<=1)){
echo "<a href='Yourpagename.php?page=$prev'>Prev</a> ";
}//does not displays the prev variable if you are already one first page
if($pages>=1 && $page<=$pages){
for($x=1;$x<=$pages;$x++){
echo ($x == $page) ? '<strong>'.$x.'</strong> ' : ''.$x.' ';
}//display all the pages. Display the current page as bold
}
if(!($page>=$pages)){
echo "<a href='Your page name.php?page=$next'>Next</a>";
}//do not display next vvariable if your are in the last page
?>
Thx for all the answers. I came over this tutorial and it worked: http://www.developphp.com/view.php?tid=1349
<?php
include_once("mysqli_connection.php");
$sql = "SELECT COUNT(id) FROM testimonials WHERE approved='1'";
$query = mysqli_query($db_conx, $sql);
$row = mysqli_fetch_row($query);
$rows = $row[0];
$page_rows = 10;
$last = ceil($rows/$page_rows);
if($last < 1){
$last = 1;
}
$pagenum = 1;
if(isset($_GET['pn'])){
$pagenum = preg_replace('#[^0-9]#', '', $_GET['pn']);
}
if ($pagenum < 1) {
$pagenum = 1;
} else if ($pagenum > $last) {
$pagenum = $last;
}
$limit = 'LIMIT ' .($pagenum - 1) * $page_rows .',' .$page_rows;
$sql = "SELECT id, firstname, lastname, datemade FROM testimonials WHERE approved='1' ORDER BY id DESC $limit";
$query = mysqli_query($db_conx, $sql);
$textline1 = "Testimonials (<b>$rows</b>)";
$textline2 = "Page <b>$pagenum</b> of <b>$last</b>";
$paginationCtrls = '';
if($last != 1){
if ($pagenum > 1) {
$previous = $pagenum - 1;
$paginationCtrls .= 'Previous ';
for($i = $pagenum-4; $i < $pagenum; $i++){
if($i > 0){
$paginationCtrls .= ''.$i.' ';
}
}
}
$paginationCtrls .= ''.$pagenum.' ';
for($i = $pagenum+1; $i <= $last; $i++){
$paginationCtrls .= ''.$i.' ';
if($i >= $pagenum+4){
break;
}
}
if ($pagenum != $last) {
$next = $pagenum + 1;
$paginationCtrls .= ' Next ';
}
}
$list = '';
while($row = mysqli_fetch_array($query, MYSQLI_ASSOC)){
$id = $row["id"];
$firstname = $row["firstname"];
$lastname = $row["lastname"];
$datemade = $row["datemade"];
$datemade = strftime("%b %d, %Y", strtotime($datemade));
$list .= '<p>'.$firstname.' '.$lastname.' Testimonial - Click the link to view this testimonial<br>Written '.$datemade.'</p>';
}
mysqli_close($db_conx);
?>
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
body{ font-family:"Trebuchet MS", Arial, Helvetica, sans-serif;}
div#pagination_controls{font-size:21px;}
div#pagination_controls > a{ color:#06F; }
div#pagination_controls > a:visited{ color:#06F; }
</style>
</head>
<body>
<div>
<h2><?php echo $textline1; ?> Paged</h2>
<p><?php echo $textline2; ?></p>
<p><?php echo $list; ?></p>
<div id="pagination_controls"><?php echo $paginationCtrls; ?></div>
</div>
</body>
</html>
I was following a tutorial on basic php tables to show the users with pagination:
http://www.killersites.com/community/index.php?/topic/1969-basic-php-system-vieweditdeleteadd-records/
the problem that i have is my platform does not support MySQL so i change it to MySQLi
the second problem is that the it should display only one user per page but it just show all of them in 1 page and when click on for example on page 2 it is show me error page
this is an image to better description :
http://store2.up-00.com/2014-02/1391920754996.jpg
and this is the code that i am using :
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>View Records</title>
</head>
<body>
<?php
/*
VIEW-PAGINATED.PHP
Displays all data from 'players' table
This is a modified version of view.php that includes pagination
*/
// connect to the database
include('config.php');
// number of results to show per page
$per_page = 1;
// figure out the total pages in the database
$result = mysqli_query($connecDB,"SELECT * FROM users");
$total_results = mysqli_num_rows($result);
$total_pages = ceil($total_results / $per_page);
// check if the 'page' variable is set in the URL (ex: view-paginated.php?page=1)
if (isset($_GET['page']) && is_numeric($_GET['page']))
{
$show_page = $_GET['page'];
// make sure the $show_page value is valid
if ($show_page > 0 && $show_page <= $total_pages)
{
$start = ($show_page -1) * $per_page;
$end = $start + $per_page;
}
else
{
// error - show first set of results
$start = 0;
$end = $per_page;
}
}
else
{
// if page isn't set, show first set of results
$start = 0;
$end = $per_page;
}
// display pagination
echo "<p> | <b>View Page:</b> ";
for ($i = 1; $i <= $total_pages; $i++)
{
echo "<a href='admin_user_list.php?page=$i'>$i</a> ";
}
echo "</p>";
// display data in table
echo "<table border='1' cellpadding='10'>";
echo "<tr> <th>ID</th> <th>First Name</th> <th>Last Name</th>";
// loop through results of database query, displaying them in the table
for ($i = $start; $i < $end; $i++)
{
// make sure that PHP doesn't try to show results that don't exist
if ($i == $total_results) { break; }
// echo out the contents of each row into a table
echo "<tr>";
while($row = mysqli_fetch_assoc($result)) {
$id = $row['id'];
$fname = $row['first_name'];
$lname = $row['last_name'];
echo "<tr><td>";
echo $id;
echo "</td>";
echo "<td>";
echo $fname;
echo "<td>";
echo $lname;
echo "</td></tr>";
}
echo "</td></tr>";
}
// close table>
echo "</table>";
// pagination
?>
<p>Add a new record</p>
</body>
</html>
I couldn't fix your existing script, so I found a pagination script that I modified and has worked for me.
You will undoubtingly want to modify it, but it works.
Just change the DB credentials and other things you will find throughout the script.
There are a few comments in it also on commented-out options.
<?php
$DB_HOST = "xxx";
$DB_NAME = "xxx";
$DB_PASS = "xxx";
$DB_USER = "xxx";
$db = new mysqli($DB_HOST, $DB_USER, $DB_PASS, $DB_NAME);
if($db->connect_errno > 0) {
die('Connection failed [' . $db->connect_error . ']');
}
$sql2 = "SELECT COUNT(id) FROM users ";
$query2 = mysqli_query($db, $sql2);
$row = mysqli_fetch_row($query2);
// Here we have the total row count
$rows = $row[0];
// This is the number of results we want displayed per page
$page_rows = 1;
// This tells us the page number of our last page
$last = ceil($rows/$page_rows);
// This makes sure $last cannot be less than 1
if($last < 1){
$last = 1;
}
// Establish the $pagenum variable
$pagenum = 1; // do not change this
// Get pagenum from URL vars if it is present, else it is = 1
if(isset($_GET['pn'])){
$pagenum = preg_replace('#[^0-9]#', '', $_GET['pn']);
}
// This makes sure the page number isn't below 1, or more than our $last page
if ($pagenum < 1) {
$pagenum = 1;
} else if ($pagenum > $last) {
$pagenum = $last;
}
// This sets the range of rows to query for the chosen $pagenum
$limit = 'LIMIT ' .($pagenum - 1) * $page_rows .',' .$page_rows;
// This is your query again, it is for grabbing just one page worth of rows by applying $limit
$sql = "SELECT id, first_name, last_name FROM users ORDER BY id ASC $limit";
$query = mysqli_query($db, $sql);
// This shows the user what page they are on, and the total number of pages
$textline1 = "Names (<b>$rows</b>)";
$textline2 = "Page <b>$pagenum</b> of <b>$last</b>";
// Establish the $paginationCtrls variable
$paginationCtrls = '';
// If there is more than 1 page worth of results
if($last != 1){
/* First we check if we are on page one. If we are then we don't need a link to
the previous page or the first page so we do nothing. If we aren't then we
generate links to the first page, and to the previous page. */
if ($pagenum > 1) {
$previous = $pagenum - 1;
$paginationCtrls .= 'Previous ';
// Render clickable number links that should appear on the left of the target page number
for($i = $pagenum-4; $i < $pagenum; $i++){
if($i > 0){
$paginationCtrls .= ''.$i.' ';
}
}
}
// Render the target page number, but without it being a link
$paginationCtrls .= ''.$pagenum.' ';
// Render clickable number links that should appear on the right of the target page number
for($i = $pagenum+1; $i <= $last; $i++){
$paginationCtrls .= ''.$i.' ';
if($i >= $pagenum+4){
break;
}
}
// This does the same as above, only checking if we are on the last page, and then generating the "Next"
if ($pagenum != $last) {
$next = $pagenum + 1;
$paginationCtrls .= ' Next ';
}
}
$dynamicList = '';
// display data in table
echo "<table border='1' cellpadding='10'>";
// echo "<tr> <th>ID</th> <th>First Name</th> <th>Last Name</th> <th></th> <th></th></tr>";
echo "<tr> <th>ID</th> <th>First Name</th> <th>Last Name</th>";
echo "<tr>";
while($row = mysqli_fetch_array($query, MYSQLI_ASSOC)){
/*
$id = $row["id"];
$product_name = $row["first_name"];
$price = $row["last_name"];
*/
$id = $row['id'];
$fname = $row['first_name'];
$lname = $row['last_name'];
echo "<tr><td>";
echo $id;
echo "</td>";
echo "<td>";
echo $fname;
echo "<td>";
echo $lname;
echo "</td></tr>";
// you can use and modify this below
// the <!-- and --> tags can be taken out. Those are regular HTML comment tags.
$dynamicList .= "
<!--
<li><div class='product'>
<a href='pager.php?id=$id' class='info'>
<span class='holder'>
<img src='images/$id.jpg' alt='$product_name' />
<span class='book-name'>$product_name</span>
</a>
<a href='pager.php?id=$id' class='buy-btn'> (link) <span class='price'>$price</span></a>
</div>
</li>
-->
";
}
// Close your database connection
mysqli_close($db);
?>
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
body{ font-family:"Trebuchet MS", Arial, Helvetica, sans-serif;}
div#pagination_controls{font-size:21px;}
div#pagination_controls > a{ color:#06F; }
div#pagination_controls > a:visited{ color:#06F; }
</style>
</head>
<body>
<div>
<h2><?php echo $textline1; ?> Paged</h2>
<p><?php echo $textline2; ?></p>
<p><?php echo $dynamicList; ?></p>
<div id="pagination_controls"><?php echo $paginationCtrls; ?></div>
</div>
</body>
</html>
I want to perform some data filtering from database. After filtering, session variable is lost and I'm getting this error:
Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in ..\test.php on line 34.
Can someone help?
FORM:
<form action= "test.php" method='get'>
<select name="Type">
<option value="winter" name="winter">winter</option>
</select>
<input type='submit' value = 'filter'>
</form>
CODE:
<?php
session_start();
$_SESSION['winter'] = $_GET['Type'];
$type = $_SESSION['winter'] ;
include "mysqlConnect.php";
//check for a page number. If not, set it to page 1
if (!(isset($_GET['pagenum']))){
$pagenum = 1;
}else{
$pagenum = $_GET['pagenum'];
}
//query for record count to setup pagination
$data = mysql_query("SELECT * FROM tblPhotos WHERE Type='$type' ");
$rows = mysql_num_rows($data);
//number of photos per page
$page_rows = 16;
//get the last page number
$last = ceil($rows/$page_rows);
//make sure the page number isn't below one, or more than last page num
if ($pagenum < 1){
$pagenum = 1;
}elseif ($pagenum > $last){
$pagenum = $last;
}
//Set the range to display in query
$max = 'limit ' .($pagenum - 1) * $page_rows .',' .$page_rows;
//get all of the photos
$dynamicList = "";
$sql = mysql_query("SELECT * FROM tblPhotos WHERE Type='$type' $max ");
//check for photos
$photoCount = mysql_num_rows($sql); //LINE 34
echo $photoCount;
if ($photoCount > 0){
while($row = mysql_fetch_array($sql)){
$photoID = $row["PhotoID"];
$photoName = $row["photoName"];
$category = $row["category"];
$dynamicList .= '
<div class="thumb">
<img class="clip" src="galleryPhotos/' . $photoID . '.jpg" alt="' . $photoName . '" width="175" border="0" />
</div>
';
}
}else{
$dynamicList = "There are no photos at this time!";
}
mysql_close();
echo '<p style="text-align:center; font-weight:bold;">Page ' . $pagenum . ' of ' . $last . '</p>';
if ($pagenum == 1){
echo '<div class="pagination" align="center"><ul>';
}else{
echo '<div class="pagination" align="center"><ul><li>« first</li>';
$previous = $pagenum-1;
}
//check if number of pages is higher than 1
if($last != 1){
//Loop from 1 to last page to create page number links
for($i = 1; $i <= $last; $i++){
echo '<li>' . $i . '</li>';
}
}
if ($pagenum == $last){
echo '</div>';
}else{
$next = $pagenum+1;
echo '<li>last »</li></ul></div>';
}
echo $dynamicList;
?>
Your Code: mysql_query("SELECT * FROM tblPhotos WHERE Type='$type' $max ");
Read the error message, it is telling you something is wrong with the query. Having looked at the query. I am inclined to agree.