Pagination - First page works great, next pages are blank

[ArizonaJohn]

Hello,

The code below works great. The user enters a name into an HTML form, the code looks up a table with that name, and then that table is displayed.

I am trying to use pagination with it, and the pagination almost works. The first page of the pagination works fine, but when I click on one of the links for one of the next pages, the page is blank.

I have seen people mention this problem, and they have been told that a variable is not being passed to the next pages. So I have experimented passing variables using both the session method and the get method, and nothing seems to work. The code below shows "?currentpage=2&find=miami" at the end of the URL of the next pages for the topic "miami," but the page is blank.

Any ideas why this pagination is not working for the next pages?

Thanks,

John

<?php
session_start();
$find = strip_tags($find);
$find = trim ($find);
$find = strtolower($find);
$_SESSION['find'] = $find;
 
 
 
mysql_connect("mysqlv3", "username", "password") or die(mysql_error());
mysql_select_db("sand2") or die(mysql_error());
 
// We preform a bit of filtering
 
 
$find = strip_tags($find);
$find = trim ($find);
$find = strtolower($find);
 
$_GET['find'] = (isset($_POST['find'])) ? $_POST['find'] : $_GET['find'];
$_GET['find'] = strtolower($_GET['find']);
 
$result=mysql_query("SHOW TABLES FROM sand2 LIKE '%$find%'")
or die(mysql_error());
 
$_GET['result'] = $result;
 
if(mysql_num_rows($result)>0){
while($table=mysql_fetch_row($result)){
 
$_GET[`$table[0]`] = $table;
$_SESSION['table']= $table;
 
$presult = mysql_query("SELECT COUNT(*) FROM `$table[0]`") or die(mysql_error());
 
$rr = mysql_fetch_row($presult);  
$numrows = $rr[0]; 
$rowsperpage = 20; 
$totalpages = ceil($numrows / $rowsperpage);
 
// get the current page or set a default  
if (isset($_GET['currentpage']) && is_numeric($_GET['currentpage'])) {  
   // cast var as int  
   $currentpage = (int) $_GET['currentpage'];  
} else {  
   // default page num  
   $currentpage = 1;  
} // end if  
 
// if current page is greater than total pages...  
if ($currentpage > $totalpages) {  
   // set current page to last page  
   $currentpage = $totalpages;  
} // end if  
// if current page is less than first page...  
if ($currentpage < 1) {  
   // set current page to first page  
   $currentpage = 1;  
} // end if  
 
// the offset of the list, based on current page   
$offset = ($currentpage - 1) * $rowsperpage; 
 
 
print "<p class=\"topic\">$table[0]</p>\n";
$r=mysql_query("SELECT * , votes_up - votes_down AS effective_vote FROM `$table[0]` ORDER BY effective_vote DESC LIMIT $offset, $rowsperpage");
 
$_GET[`$r[0]`] = $r;
 
print "<table class=\"navbar\">\n";
while($row=mysql_fetch_array($r)){
 
$_GET[`$row[0]`] = $row;
$_SESSION['row']= $row;
 
$effective_vote = $row['votes_up'] - $row['votes_down']; 
 
print "<tr>";
 
print "<td>".'<a href="http://'.$row['site'].'" class="links2">'.$row['site'].'</a>'."</td>";
print "<td class='votes'>".'<span class="votes_count" id="votes_count'.$row['id'].'">'.number_format($effective_vote).'</span>'."</td>";
print "<td class='ballot'>".'<span class="button" id="button'.$row['id'].'">'.'<a href="javascript:;" class="cell1" id="'.$row['id'].'">'.Vote.'</a>'.'</span>'."</td>";
}
print "</tr>\n";
}
print "</table>\n";
 
 
$range = 3;  
 
/******  build the pagination links ******/  
// range of num links to show    
 
// if not on page 1, don't show back links  
if ($currentpage > 1) {  
   // show << link to go back to page 1  
   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=1&find={$_SESSION['find']}'><<</a> ";  
   // get previous page num  
   $prevpage = $currentpage - 1;  
   // show < link to go back to 1 page  
   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$prevpage&find={$_SESSION['find']}'><</a> ";  
} // end if   
 
// loop to show links to range of pages around current page  
for ($x = ($currentpage - $range); $x < (($currentpage + $range) + 1); $x++) {  
   // if it's a valid page number...  
   if (($x > 0) && ($x <= $totalpages)) {  
      // if we're on current page...  
      if ($x == $currentpage) {  
         // 'highlight' it but don't make a link  
         echo " [<b>$x</b>] ";  
      // if not current page...  
      } else {  
         // make it a link  
     echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$x&find={$_SESSION['find']}'>$x</a> ";  
      } // end else  
   } // end if   
} // end for  
 
// if not on last page, show forward and last page links      
if ($currentpage != $totalpages) {   
   // get next page  
   $nextpage = $currentpage + 1;  
    // echo forward link for next page   
   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$nextpage&find={$_SESSION['find']}'>></a> ";  
   // echo forward link for lastpage  
   echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$totalpages&find={$_SESSION['find']}'>>></a> ";  
} // end if  
/****** end build pagination links ******/  
 
 
}
 
 
 
else{
print "None found";
}
 
 
 
 
//This counts the number or results - and if there wasn't any it gives them a little message explaining that
$anymatches=mysql_num_rows($result);
if ($anymatches == 0)
{
echo "Sorry, but we can not find an entry to match your query<br><br>";
unset($_SESSION['find']);    
 
}
 
 
}
?>
 
 

[prabirchoudhury]

hey, you dont need to assign $_session for the [ next ] [previous] page .. have a look on

Pagination Problem

[ArizonaJohn]

Hi Prabirchoudhury,

Could you be more specific? What variable does not need a $_session?

Thanks,

John

[prabirchoudhury]

ok..
you are doing simple pagination so for that you need
1. dont need to assign $_SESSION['find'] = $find; to store and carry your variable $find.

2. you are passing $find already through query string (with next and previous page url) , so from the next page you could get this $find frm $_GET[find] and use it and pass again through the query string.

3. and make sure you are getting all the variables you need for the next page.

echo all the variables and make sure you are nor missing passed to the next page.

may be your session is unset($_SESSION['find']); in the bottom condition

[ArizonaJohn]

Hi,

I tried using &find={$_GET['find']}, and the variable is indeed being passed through. I can tell by the URL of the next pages.

However, the results are still blank.

Maybe "find" is the wrong variable for me to be passing through? After all, this is the result that I am breaking up into pagination:

$result=mysql_query("SHOW TABLES FROM sand2 LIKE '%$find%'")
or die(mysql_error());
 
if(mysql_num_rows($result)>0){
while($table=mysql_fetch_row($result)){
 
print "<p class=\"topic\">$table[0]</p>\n";
$r=mysql_query("SELECT * , votes_up - votes_down AS effective_vote FROM `$table[0]` ORDER BY effective_vote DESC LIMIT $offset, $rowsperpage");
 
 
print "<table class=\"navbar\">\n";
while($row=mysql_fetch_array($r)){