Issues with Pagination in PHP - php

Question

Currently I've 2 tables and have the datas are dynamic.
I need to add pagination for both tables seperately. I had added paginator using paginator class and it is working fine. But the problem is when I click on the next button of the first table then the contents of both tables are changed in to the next page.
Paginator.php
<?php
// Paginator Class
// error_reporting(E_ALL);
define("QS_VAR", "page"); // the variable name inside the query string (don't use this name inside other links)
define("STR_FWD", "Next>>"); // the string is used for a link (step forward)
define("STR_BWD", "<<Prev"); // the string is used for a link (step backward)
$scriptname = (isset($_SERVER['SCRIPT_NAME']) ? $_SERVER['SCRIPT_NAME'] : '');
define("SCRIPT_NAME", $scriptname);
$v = (isset($_REQUEST['page_num_rows']) ? (is_numeric($_REQUEST['page_num_rows']) ? $_REQUEST['page_num_rows'] : 5) : 5);
define("NUM_ROWS", $v); // the number of records on each page
class Paginator {
var $sql;
var $result;
var $get_var = QS_VAR;
var $rows_on_page = NUM_ROWS;
var $str_forward = STR_FWD;
var $str_backward = STR_BWD;
var $all_rows;
var $num_rows;
var $page;
var $number_pages;
var $url_name = SCRIPT_NAME;
// constructor
function Paginator() {
}
// sets the current page number
function set_page() {
$this->page = (isset($_REQUEST[$this->get_var]) && $_REQUEST[$this->get_var] != "") ? $_REQUEST[$this->get_var] : 0;
return $this->page;
}
// gets the total number of records
function get_total_rows() {
$tmp_result = mysql_query($this->sql);
$this->all_rows = mysql_num_rows($tmp_result);
mysql_free_result($tmp_result);
return $this->all_rows;
}
// get the totale number of result pages
function get_num_pages() {
$this->number_pages = ceil($this->get_total_rows() / $this->rows_on_page);
return $this->number_pages;
}
// returns the records for the current page
function get_page_result() {
$start = $this->set_page() * $this->rows_on_page;
$page_sql = sprintf("%s LIMIT %s, %s", $this->sql, $start, $this->rows_on_page);
$this->result = mysql_query($page_sql);
return $this->result;
}
// get the number of rows on the current page
function get_page_num_rows() {
$this->num_rows = #mysql_num_rows($this->result);
return $this->num_rows;
}
// free the database result
function free_page_result() {
#mysql_free_result($this->result);
}
function display_row_count() {
$var = $this->get_var;
$url_part1 = $this->url_name . "?";
$url_part2 = "&" . $var . "=0" . $this->rebuild_qs($var);
$select = " Show ";
$select.="<form method=get name=page_num_rows_form action=\"$this->url_name\" >"; // [form used for javascript disabled case] -not working
$select.="<select name=page_num_rows id=page_num_rows onChange=\"window.location='$url_part1'+'page_num_rows='+this.value+'$url_part2'\" >";
$select.="<option value=50 " . (isset($_REQUEST['page_num_rows']) ? ($_REQUEST['page_num_rows'] == 50 ? ' selected ' : '') : '') . " >50</option>";
$select.="<option value=100 " . (isset($_REQUEST['page_num_rows']) ? ($_REQUEST['page_num_rows'] == 100 ? ' selected ' : '') : '') . " >100</option>";
$select.="<option value=150 " . (isset($_REQUEST['page_num_rows']) ? ($_REQUEST['page_num_rows'] == 150 ? ' selected ' : '') : '') . " >150</option>";
$select.="<option value=200 " . (isset($_REQUEST['page_num_rows']) ? ($_REQUEST['page_num_rows'] == 200 ? ' selected ' : '') : '') . " >200</option>";
$select.="<option value=500 " . (isset($_REQUEST['page_num_rows']) ? ($_REQUEST['page_num_rows'] == 500 ? ' selected ' : '') : '') . " >500</option>";
$select.="</select>";
$select.="<noscript> <input type=submit value=Go /></noscript>";
$select.="</form>"; // form used for javascript disabled case -- not working
$select.=" per page";
return $select;
}
// function to handle other querystring than the page variable
function rebuild_qs($curr_var) {
if (!empty($_SERVER['QUERY_STRING'])) {
$parts = explode("&", $_SERVER['QUERY_STRING']);
$newParts = array();
foreach ($parts as $val) {
if (stristr($val, $curr_var) == false) {
array_push($newParts, $val);
}
}
if (count($newParts) != 0) {
$qs = "&" . implode("&", $newParts);
} else {
return false;
}
return $qs; // this is your new created query string
} else {
return false;
}
}
// this method will return the navigation links for the conplete recordset
function navigation($separator = " | ", $css_current = "", $back_forward = false) {
$max_links = NUM_LINKS;
$curr_pages = $this->set_page();
$all_pages = $this->get_num_pages() - 1;
$var = $this->get_var;
$navi_string = "";
if (!$back_forward) {
$max_links = ($max_links < 2) ? 2 : $max_links;
}
if ($curr_pages <= $all_pages && $curr_pages >= 0) {
if ($curr_pages > ceil($max_links / 2)) {
$start = ($curr_pages - ceil($max_links / 2) > 0) ? $curr_pages - ceil($max_links / 2) : 1;
$end = $curr_pages + ceil($max_links / 2);
if ($end >= $all_pages) {
$end = $all_pages + 1;
$start = ($all_pages - ($max_links - 1) > 0) ? $all_pages - ($max_links - 1) : 1;
}
} else {
$start = 0;
$end = ($all_pages >= $max_links) ? $max_links : $all_pages + 1;
}
if ($all_pages >= 1) {
$forward = $curr_pages + 1;
$backward = $curr_pages - 1;
$navi_string = ($curr_pages > 0) ? "" . $this->str_first . " " . $this->str_backward . " " : $this->str_first . " " . $this->str_backward . " ";
$navi_string .= ($curr_pages < $all_pages) ? " " . $this->str_forward . "" . " " : " " . $this->str_forward . " ";
}
}
return "<span style='font-size:.7em; padding:3px 3px 4px 3px;'>" . $this->current_page_info() . $navi_string . "</span>";
}
function current_page_info() {
$cur_page = $this->set_page() + 1;
$total_pages = $this->get_num_pages();
// $page_info = " Page " . $cur_page . " of " . $total_pages . " ";
// return $page_info;
}
function show_go_to_page() {
$cur_page = $this->set_page() + 1;
$total_pages = $this->get_num_pages();
$options = "";
for ($i = 1; $i <= $total_pages; $i++) {
$options.="<option value=$i " . (($i == $cur_page) ? ' selected ' : '') . ">$i</option>";
}
$page_info = " Go to page <input type=text name=paginator_go_to_page id=paginator_go_to_page size=1 value=$cur_page />";
// $page_info.= "<select name=paginator_go_to_page2 >$options</select>";
return $page_info;
}
}
?>
tables.php
<?php
include("library/paginator.php");
?>
<div style="text-align:right;">
<?
$query = "select * from haves_settings";
$tab = mysql_query($query);
$row = mysql_fetch_array($tab);
$item_no = $row['items_to_show'];
$scroll = $row['scroll_interval'];
$online_paginate = new Paginator;
$online_paginate->sql = "select * from placing_item_bid where status='Active' and picture1!='' and selling_method!='want_it_now' and selling_method!='ads' and bid_starting_date <= now() and expire_date>=now() order by item_id desc"; // sql statement
$online_paginate->rows_on_page = $item_no;
$results = $online_paginate->get_page_result(); // result set
$num_rows = $online_paginate->get_page_num_rows(); // number of records in result set
$nav_links = $online_paginate->navigation(" | "); // the navigation links (define a CSS class
?>
</div>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr bgcolor="#d79196" class="detail9txt">
<input type="hidden" value="2" name="len">
<td align="center" width="20%"><b>Picture</b> </td>
<td width="30%" align="center"><b>Name / Responses</b> </td>
<td width="50%" align="center"><b>Description</b> </td>
</tr><tr style="height:10px;"><td></td></tr>
<?
if ($num_rows > 0) {
while ($bestsellers_fetch = mysql_fetch_array($results)) {
$temp = $bestsellers_fetch['item_id'];
$sql = "SELECT count(`user_id`) as response FROM `watch_list` where `item_id`=$temp group by `item_id`";
$res = mysql_query($sql);
$response = mysql_fetch_row($res);
$counttop = $counttop + 1;
if (!empty($bestsellers_fetch['sub_title']))
$item_subtitle1 = $bestsellers_fetch['sub_title'];
else
$item_subtitle1 = substr($bestsellers_fetch['item_title'], 0, 20);
$item_title1 = substr($bestsellers_fetch['item_title'], 0, 40)
?>
<tr>
<td class="tr_botborder" style="vertical-align:middle;" width="20%" align="center"><div align="center"><img src="thumbnail/<?= $bestsellers_fetch['picture1']; ?>" alt="" width="79" height="70" border="0" /></div></td>
<td class="tr_botborder" style="vertical-align:middle;" width="30%" align="center"><div align="center"><span class="bestsellerstxt"><?= $item_subtitle1; ?> <?= $item_title1; ?><br/><?php if ($response[0] != '') { ?><a style="text-decoration:none;color:#336666;" href="detail.php?item_id=<?= $bestsellers_fetch['item_id']; ?>"> <?php echo $response[0] . ' responses'; ?></a> <?php } else { ?><span style="color:#666666;"><?php
echo '0 responses';
}
?></span></span></td>
<td class="tr_botborder" style="vertical-align:middle;" width="50%" align="center"><div align="center"><span class="bestsellerstxt"><?= html_entity_decode($bestsellers_fetch['detailed_descrip']); ?></span></td>
</tr>
<?
if ($counttop != 2) {
}
}
} else {
?>
<tr><td height="148" align="center" class="featxt">No Items Available</td></tr>
<?
}
?>
</table>
<div style="text-align: right;"><?php echo $nav_links; ?></div>
//wants content
$online_paginate1 = new Paginator;
$online_paginate1->sql = "select * from placing_item_bid where status='Active' and selling_method='want_it_now' order by item_id desc";
$online_paginate1->rows_on_page = $item_no1;
$result1 = $online_paginate1->get_page_result(); // result set
$want_total_records = $online_paginate1->get_page_num_rows(); // number of records in result set
$nav_links1 = $online_paginate1->navigation(" | "); // the navigation links (define a CSS class
?>
<div class="superbg">
<table cellspacing="0" cellpadding="5" width=100%>
<form name="want_form" action="myauction.php" method=post>
<tr bgcolor="#d79196" class="detail9txt">
<input type="hidden" name="len" value="<?= $want_total_records ?>">
<td align="center" width="30%"><b>Name / Responses</b> </td>
<td align="center" width="20%"><b>Picture</b> </td>
<td width="50%" align="center"><b>Description</b> </td>
</tr>
<?
if ($want_total_records > 0) {
while ($want_row = mysql_fetch_array($result1)) {
$tot_bid_sql = "select count(*) from want_it_now where wanted_itemid=" . $want_row[item_id];
$tot_bid_res = mysql_query($tot_bid_sql);
$tot_bids = mysql_fetch_array($tot_bid_res);
?>
<tr class="detail9txt">
<td class="tr_botborder" align="center" style="vertical-align:middle;" width="30%">
<a href="wantitnowdes.php?item_id=<?= $want_row['item_id'] ?>" class="header_text">
<? echo $want_row['item_title']; ?></a> <br/> <?
if ($tot_bids[0] != 0) {
?>
<a style="font-weight:normal;" href="wantitnowdes.php?item_id=<?= $want_row['item_id'] ?> " class="header_text"><? echo $tot_bids[0] . ' responses'; ?></a>
<?
} else {
echo $tot_bids[0] . ' responses';
}
?></td>
<td class="tr_botborder" style="vertical-align:middle;" width="20%" align="center">
<?
if (!empty($want_row['picture1'])) {
$img = $want_row['picture1'];
list($width, $height, $type, $attr) = getimagesize("images/$img");
$h = $height;
$w = $width;
if ($h > 50) {
$nh = 50;
$nw = ($w / $h) * $nh;
$h = $nh;
$w = $nw;
}
if ($w > 50) {
$nw = 50;
$nh = ($h / $w) * $nw;
$h = $nh;
$w = $nw;
}
?>
<!-- <img name="runimg" src="images/<? //echo $want_row['picture1']; ?>" border=1 width=<? //= $w; ?> height=<? //=$h ?> >-->
<img name="runimg" src="images/<? echo $want_row['picture1']; ?>" border=1 width="79" height="70" >
<?
} else {
?>
<img src="images/no_image.gif" border=1 name="runimg" >
<? } ?>
</td>
<td class="tr_botborder" style="vertical-align:middle;" width="50%" align="center"><div align="center"><span class="bestsellerstxt"><?= html_entity_decode($want_row['detailed_descrip']); ?></span></td>
</tr>
<?
} // while
} else {
?>
<tr>
<td width="3%"> </td>
<td width="97%" class="myauction3txt">There are no items in this section</td>
</tr>
<? } ?>
</table>
<div style="text-align: right;"><?php echo $nav_links1; ?></div>
</div>

Answer 1

Where is the problem ?
Paginator class uses the same query string "page" parameter to calculate the current page. If you add 2 or more Pagination in the same request, "page" will be shared by all instances, leading to this mess you described.
How to fix it ?
Tell the Paginator class which parameter to use in query string... follow this 2-step patch below :
Step 1 : replace constructor in Paginator class
// constructor
function Paginator($get_var=null) {
if ($get_var!=null) $this->get_var = $get_var;
}
Step 2 : update Paginator object creation (twice)
$online_paginate = new Paginator('page_table1');
and later :
$online_paginate1 = new Paginator('page_table2');
Hope this helps !