Pagination limit

[MMG35]

Hi friends,

I have a site, where I want to limit the number of pages being viewed.
example:
1 | 2 | 3 | 4 | 5 | 5 | 7 | 8 | 9 | 10 | 11

want to reduce this to:

1 | 2 | 3 | 4 | ... | 10 | 11

I have the code but is giving headaches.

if(!empty($_GET[Start])) 
{ 
   $Start = $_GET[Start]; 
} 
else 
{ 
   $Start = '0'; 
} 

// limit of  links per page 
$ByPage = '13'; 

$rnav = mysql_query($qnav) or die(mysql_error()); 
      $rows = mysql_num_rows($rnav); 


         if($rows > $ByPage) 
         { 


                                  $ListingTable .=  "<table class=\"tlistnav\" border=0 cellspacing=0 align=center width=100% >"; 
            $ListingTable .= "<tr><td align=center><font face=verdana size=2> | "; 

            $pages = ceil($rows/$ByPage); 
         $pagesLimit = 10;//Limit of pages  

         $lowAllow = (int)($Start - ($pagesLimit / 2));  
            $start = ($lowAllow <= 0) ? 1 : $lowAllow;  
            $aboveAllow = $start + $pagesLimit;  
            $until = ($aboveAllow > $pages) ? $pages : $aboveAllow;  

            for($i = $start; $i <= $until; $i++)  
            { 
               $PageStart = $ByPage*$i; 

               $i2 = $i + 1; 

               if($PageStart == $Start) 
               { 
                  $links[] = " <span class=CurrPageIdx>$i2</span>\n\t "; 
               } 
               elseif($PageStart < $rows) 
               { 
$links[] = " <a class=BlackLink href=\"search.php?Start=$PageStart&c=$_GET[c]&s=$_GET[s]&search_kw=$_GET[search_kw]&CategoryID=$_GET[CategoryID]&search_district=$_GET[search_district]&search_place=$_GET[search_place]&search_city=$_GET[search_city]&PostID=$_GET[PostID]&zip=$_GET[zip]&old=$_GET[old]\">$i2</a>\n\t ";    

               } 
            } 

            $links2 = implode(" | ", $links); 

            $ListingTable .= $links2; 


            $ListingTable .= "| </td></tr>"; 
            //tablefix added </tr> to tlisnav 

            $ListingTable .= "</table><br><br>\n"; 

         } 
         else  // rows <= bypage (no navbar required) 
         { 
          $ListingTable .= "<br><br>\n"; 
         }  

Unfortunately the code is giving error, because the first page ( 1 ) does not appear, and when I click on page two so now appears 9 | 10 | 11 and will not appear on the page 1 | or later.
Testing with a limit of 5, the initial result of paging is: 2 | 3 | 4 | 5

In the following pages of error:
Warning: implode () [function.implode]: Invalid arguments passed in C: \ Program Files \ xampp \ htdocs \ teste \ search.php on line 511

line 511 corresponds to the code:

$links2 = implode(" | ", $links); 

I would appreciate help from anyone who has a practice in the matter.
Thank you for your kindness in helping ...

[diafol]

Is the number of pages static? Or are they determined by the number of records in a DB query result for example?

[MMG35]

The number of pages is determined by "bypage, where is integrated into the list of topics per page. In bypage 13 topics is limited. When it's 13 topics, it creates a new page. The number of pages is calculated by the code:

if (! empty ($ _GET [Start]))
{
$ Start = $ _GET [Start];
}
else
{
$ Start = '0 ';
}

$ ByPage = '13 ';

traveling the database:

$ q1 = "select * from class_agents, class_categories, class_subcat, where class_posts class_posts.CategoryID class_categories.CategoryID = and = class_posts.AgentID class_agents.AgentID and class_posts.status! = 'expired' and class_posts.status! = 'notconf' and class_posts . status! = 'notpaid' and class_posts.SubCategoryID class_subcat.subcatid = $ $ MyQuery myOrder limit $ Start, $ ByPage ";

Unfortunately I can not see where the error is.
I would appreciate some help.