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pagination... Just math problems i think

blueman378

By blueman378
in PHP Coding Help

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blueman378 Advanced Member

blueman378

Posted
Posted

hi guys, well heres the relevant code:

<?php
$root = "../";
$tbl_name="forum_question"; // Table name

// get value of id that sent from address bar
$page=$_GET['page'];
if (isset($page)) {
$page=$_GET['page'];
}
else{ $page=1;}
$answer_id = $_GET['answer_id'];

<?php
} 
//**EDIT TO YOUR TABLE NAME, ECT.
$tbl_name2="forum_answer"; // Switch to table "forum_answer"


$t = mysql_query("SELECT * FROM $tbl_name2 WHERE question_id='$id'"); 
  if(!$t) die(mysql_error()); 
    
$a                  = mysql_fetch_object($t); 
$total_items      = mysql_num_rows($t); 
$limit            = "5"; 
//if it is the first page set limit to 1 less than normal because of op being shown
if($page == 1) {
$limit--; }

//set default if: $page is empty, non numerical, less than zero, greater than total available 
if((!$page) || (is_numeric($page) == false) || ($page < 0) || ($page > $total_items)) { 
      $page = 1; //default 
} 

//calcuate total pages 
$total_pages     = ceil($total_items / $limit); 
$set_limit          = $page * $limit - ($limit); 

     if($page >= 2)
     {
  echo("  <a href=?id=$id&action=view&page=1><< First </a> | ");
  }
//Display middle pages: **EDIT LINK PATH** 
     $pcount = $page - 2 ;
     if($pcount >= 1 && $pcount != 1)
     {
  echo("  <a href=?id=$id&action=view&page=$pcount> $pcount </a> | "); 
   }  
$pcount = $page - 1;
     if($pcount >= 2)
     {
  echo("  <a href=?id=$id&action=view&page=$pcount> $pcount </a> | ");
  }
  
  echo "<b>$page</b>";
  
  $pcount = $page + 1 ;
  if($pcount <= $total_pages -2)
     {
  echo("  <a href=?id=$id&action=view&page=$pcount> $pcount </a> | ");
}

  $pcount = $page + 2 ;
    if($pcount <= $total_pages -1)
     {
  echo("  <a href=?id=$id&action=view&page=$pcount> $pcount </a> | ");
}

if($page == $total_pages -2 )
     {
  echo("  <a href=?id=$id&action=view&page=$total_pages> </a> | ");
  }

     if($page != $total_pages)
     {
  echo("  <a href=?id=$id&action=view&page=$total_pages> Last >></a> | ");
  }

echo "</td></tr></table>";
$query3="SELECT view FROM $tbl_name WHERE id='$id'";
$result3=mysql_query($query3);

$rows=mysql_fetch_array($result3);
$view=$rows['view'];

// if have no counter value set counter = 1
if(empty($view)){
$view=1;
$query4="INSERT INTO $tbl_name(view) VALUES('$view') WHERE id='$id'";
$result4=mysql_query($query4);
}

// count more value
$addview=$view+1;
$query5="update $tbl_name set view='$addview' WHERE id='$id'";
$result5=mysql_query($query5);

if ($_SESSION['loggedin'] == "1")
{
if (isset($_GET['advanced']))
{ ?>

 

i took out the stuff that doesnt matter,

but heres my problem,

there are 7 pages,

however when you are on page 1 the last >> button tries to take you to page 9 for some reason,

the second problem is that the rest works fine except for on page 5

when you are on page 5 everything is fine except that it shows

 

3 | 4 | 5 | Last >> |

when it should show

3 | 4 | 5 | 6 | Last >> |

 

im guessing its jsut cause my maths is bad

 

heres the enitre code incase it helps:

<?php
$root = "../";
$tbl_name="forum_question"; // Table name

// get value of id that sent from address bar
$id=$_GET['id'];
$qid=$_GET['id'];
$page=$_GET['page'];
if (isset($page)) {
$page=$_GET['page'];
}
else{ $page=1;}
$answer_id = $_GET['answer_id'];
// only show op if it is the first page
if($page == 1)
{
$query="SELECT * FROM $tbl_name WHERE id='$id'";
$result=mysql_query($query);

$rows=mysql_fetch_array($result);

$queryd="SELECT * FROM users WHERE username='$rows[name]'";
$resultd=mysql_query($queryd);

$rowd=mysql_fetch_array($resultd);
$q= $rows['detail'];
?>

<table width="920" border="0" align="left" cellpadding="0" cellspacing="1" class="forum">
<tr height="30" class="titles">
<td valign="top" colspan="2"><u><? echo $rows['topic']; ?></u></td>
</tr>
<tr>
<td bgcolor="#111111" style="padding:5px 5px 5px 5px;" width="14%" valign="top">

<a href="?action=viewprofile&pruname=<? echo $rows['name']; ?>"><? echo $rows['name']; ?></a><br />
<strong>Posted on:</strong><br><? echo $rows['datetime']; ?><br />
<strong>Posts:</strong> <? echo $rowd['posts']; ?><br />
<img border="1" src="avatars/<? echo $rowd['avatar']; ?>" width="60" height="60"></td>
<td colspan="3" valign="top" width="86%" style="padding:5px 5px 5px 5px;"><?=$q?></td>
</tr>
</table>


<?
} 
//**EDIT TO YOUR TABLE NAME, ECT.
$tbl_name2="forum_answer"; // Switch to table "forum_answer"


$t = mysql_query("SELECT * FROM $tbl_name2 WHERE question_id='$id'"); 
  if(!$t) die(mysql_error()); 
    
$a                  = mysql_fetch_object($t); 
$total_items      = mysql_num_rows($t); 
$limit            = "5"; 
//if it is the first page set limit to 1 less than normal because of op being shown
if($page == 1) {
$limit--; }

//set default if: $page is empty, non numerical, less than zero, greater than total available 
if((!$page) || (is_numeric($page) == false) || ($page < 0) || ($page > $total_items)) { 
      $page = 1; //default 
} 

//calcuate total pages 
$total_pages     = ceil($total_items / $limit); 
$set_limit          = $page * $limit - ($limit); 

//query: **EDIT TO YOUR TABLE NAME, ECT. 

$q = mysql_query("SELECT * FROM $tbl_name2 WHERE question_id='$id' ORDER BY a_id ASC LIMIT $set_limit, $limit"); 
  if(!$q) die(mysql_error()); 
     $err = mysql_num_rows($q); 
       if($err == 0) die("No matches met your criteria.");


//show data matching query: 



while($rows=mysql_fetch_array($q)){
$queryx="SELECT * FROM users WHERE username='$rows[a_name]'";
$resultx=mysql_query($queryx);

$rowx=mysql_fetch_array($resultx);

$a= $rows['a_answer'];
?>
<table width="920" border="0" align="left" cellpadding="0" cellspacing="2">
<tr><td colspan="2" width="100%"><hr style="color:#666666" /></td></tr>
<tr><td colspan="2"><? echo $rows['a_title'];?></td></tr>
<tr>
</tr>
<tr>
<td bgcolor="#111111" valign="top" style="padding:5px 5px 5px 5px;" width="14%">
<a href="?action=viewprofile&pruname=<? echo $rows['a_name']; ?>"><? echo $rows['a_name']; ?></a><br />
<strong>Posted on:</strong><br><? echo $rows['a_datetime']; ?><br />
<strong>Posts:</strong> <? echo $rowx['posts']; ?><br />
<img border="1" src="avatars/<? echo $rowx['avatar']; ?>" width="60" height="60"></td>
<td colspan="3" valign="top" width="86%" style="padding:5px 5px 5px 5px;">
<?=$a?><p><br /><? echo $rows['edited']; ?></td>
</tr>
<?php if($_SESSION['WS_username'] == $rows['a_name'] || $_SESSION['level'] == 3){?><tr align="right"><td></td><td><?php
if($_GET['confirm'] == 1 && $rows['a_id'] == $_GET['answer_id'])
{echo "<font color='red'>Delete:</font>"; ?> 
<a href="delete_answer.php?answer_id=<?=$_GET['answer_id']?>&id=<?=$_GET['id']?>" title="Delete" id="delete"><img border="0"src="<?=$root?>images/yes.png"></a> |
<a href="?action=view&id=<?=$_GET['id']?>" title="Cancel"><img border="0"src="<?=$root?>images/Delete.png"></a> <?php }
else
{ ?>
<a href="index.php?action=change&id=<?=$qid?>&answer_id=<?=$rows['a_id']?>" title="Modify your post"><img border="0" src="<?=$root?>images/edit.png"></a>
| 
<a href="?action=view&confirm=1&id=<?=$qid?>&answer_id=<?=$rows['a_id']?>#delete" title="Delete your post"><img border="0"src="<?=$root?>images/Delete.png"></a>
</td></tr><?php } } ?>
</table>

<?php

}
echo "<table width='100%'>
<tr><td>";
     if($page >= 2)
     {
  echo("  <a href=?id=$id&action=view&page=1><< First </a> | ");
  }
//Display middle pages: **EDIT LINK PATH** 
     $pcount = $page - 2 ;
     if($pcount >= 1 && $pcount != 1)
     {
  echo("  <a href=?id=$id&action=view&page=$pcount> $pcount </a> | "); 
   }  
$pcount = $page - 1;
     if($pcount >= 2)
     {
  echo("  <a href=?id=$id&action=view&page=$pcount> $pcount </a> | ");
  }
  
  echo "<b>$page</b>";
  
  $pcount = $page + 1 ;
  if($pcount <= $total_pages -2)
     {
  echo("  <a href=?id=$id&action=view&page=$pcount> $pcount </a> | ");
}

  $pcount = $page + 2 ;
    if($pcount <= $total_pages -1)
     {
  echo("  <a href=?id=$id&action=view&page=$pcount> $pcount </a> | ");
}

if($page == $total_pages -2 )
     {
  echo("  <a href=?id=$id&action=view&page=$total_pages> </a> | ");
  }

     if($page != $total_pages)
     {
  echo("  <a href=?id=$id&action=view&page=$total_pages> Last >></a> | ");
  }

echo "</td></tr></table>";
$query3="SELECT view FROM $tbl_name WHERE id='$id'";
$result3=mysql_query($query3);

$rows=mysql_fetch_array($result3);
$view=$rows['view'];

// if have no counter value set counter = 1
if(empty($view)){
$view=1;
$query4="INSERT INTO $tbl_name(view) VALUES('$view') WHERE id='$id'";
$result4=mysql_query($query4);
}

// count more value
$addview=$view+1;
$query5="update $tbl_name set view='$addview' WHERE id='$id'";
$result5=mysql_query($query5);

if ($_SESSION['loggedin'] == "1")
{
if (isset($_GET['advanced']))
{ ?>
<div style="float:left; width:920px;">
<div class="form">
<table border="0" align="center" cellpadding="0" cellspacing="1">
<tr>
<td colspan="2">
<b>Advanced reply:</b>
</td>
</tr>
<tr><td colspan="10" align="center">
<a name="advancededitor"></a>
<form name="form_name" method="post" action="add_answer.php">
<textarea name="a_answer" cols="135" rows="5" id="a_answer" onkeydown="limitText(this.form.a_answer,this.form.countdown,5000);" 
onkeyup="limitText(this.form.a_answer,this.form.countdown,5000);"></textarea></td>
</tr>
<tr>
<td align="center" colspan="10">

<input name="id" type="hidden" value="<? echo $id; ?>"><input type="submit" name="Submit" value="Submit" class="button"> | <input type="text" name="countdown" size="1" value="5000" readonly="readonly"> | <input type="reset" name="Submit2" value="Reset" class="button">

</td>
</tr>
</form>
</tr>
</table>
</div>
</div>
<?php
}
else
{
?>
<div style="float:left; width:920px;">
<div class="form">
<table border="0" align="center" cellpadding="0" cellspacing="1">
<tr>
<td>
<b>Quick reply:</b>
</td>
</tr>
<tr>
<form name="form1" method="post" action="add_answer.php">
<td>
<table width="100%" border="0" cellpadding="3" cellspacing="1">
<tr>
<td><textarea name="a_answer" cols="135" rows="5" id="a_answer" onkeydown="limitText(this.form.a_answer,this.form.countdown,5000);" 
onkeyup="limitText(this.form.a_answer,this.form.countdown,5000);"></textarea></td>
</tr>
<tr>
<td align="center"><input name="id" type="hidden" value="<? echo $id; ?>"><input type="submit" name="Submit" value="Submit" class="button"> | <input type="text" name="countdown" size="1" value="5000" readonly="readonly"> | <input type="reset" name="Submit2" value="Reset" class="button"> | <a href="?action=view&id=<?=$id?>&advanced=advanced#advancededitor">Advanced Editor</a></td>
<td></td>
</tr>
</table>
</td>
</form>
</tr>
</table>
</div>
</div>
<?php }} ?>

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https://forums.phpfreaks.com/topic/101659-pagination-just-math-problems-i-think/
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sasa Newbie

sasa

Posted
Posted 
$total_items = mysql_num_rows($t); 
$limit = 5;
$total_pages = ceil(($total_items + 1) / $limit); 
$set_limit = $page * $limit - ($limit) - 1; 
if((!$page) || (is_numeric($page) == false) || ($page < 0) || ($page > $total_pages)) { 
      $page = 1; //default 
} 
if($page == 1) {
$limit--;
$set_limit++; }
etc.

blueman378 Advanced Member

blueman378

Posted
  • Author
Posted

well i figured it out, because on page 1 we were showing the original post we took 1 off the limit so it only showed 4 instead of 5, but the total pages was being calculated based on te limit so it was putting it off, so i simply made it that it ran 2 different queries based on the page

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