large pagination

[phpjaco]

hello

i have been using a php paging script for many years that i think i got from a zend tutorial however this tutorial or script im using doenst allow for many pages

for example

PREV 10 | [1] | [2] |[1] | [2] |[1] | [2] |[1] | [2] |[1] | [2] |[1] | [2] |[1] | [2] | NEXT 10

I want to have the option: (so I dont have the problem with pages cutting off)

PREV 10 | [1] | [2] |[1] | [2] |[1] |... | NEXT 10

I can get another php class that could do this but would rather want to understand how to do this, here is my code (sorry that its soo long)

function Paging($globalDisplay) {

  /***************************
     DISPLAY PAGINATION
   *************************/
	global $totalRows;
	global $limit;
	global $whatDisplay;

	if ($totalRows > 0) {

		 $whatDisplay  = '<table cellpadding="5" cellspacing="0" border=0 ><tr valign="top">';
		  if($_GET['page'] != 1){  
  		  $pageprev = $_GET['page'] -1; 
   		 // Fancy way of subtracting 1 from $page 

 		 $whatDisplay .= "<td><a href=\"$_SERVER[PHP_SELF]?page=$pageprev&category=$_GET[category]\" class='articles_red'>PREV".$limit."</a></span></td> ";   
    /* Tip: It is a good idea NOT to use $PHP_SELF in this link. It may work,  
but to be 99.9% sure that it will, be sure to use the actual name of the file  

this script will be running on. Also, the   adds a space to the end of  

PREV, and gives some room between the numbers. */ 
  			  }  else 
			 $whatDisplay  .= "<td>PREV ".$limit." </span></td>";  

			// If we're on page 1, PREV is not a link 
			 $numofpages = $totalRows/ $limit;  
		/* We divide our total amount of rows (for example 102) by the limit (25). This  

	will yield 4.08, which we can round down to 4. In the next few lines, we'll  
	create 4 pages, and then check to see if we have extra rows remaining for a 5th  
	page. */ 

for($i = 1; $i <= $numofpages; $i++){ 
/* This for loop will add 1 to $i at the end of each pass until $i is greater  
than $totalRows (4.08). */ 

    if($i == $_GET['page']){ 
        $whatDisplay.= '<td bgcolor="#f1f1f1">['.$i."] </td>"; 
    } else{ 
       $whatDisplay .= "<td><a href=\"$_SERVER[PHP_SELF]?page=$i&category=$_GET[category]\"  class='articles_red'>[$i]</a> </td>";  
    } 

    /* This if statement will not make the current page number available in  
link form. It will, however, make all other pages available in link form. */ 
    }   // This ends the for loop 

if(( $totalRows  % $limit) != 0){ 
/* The above statement is the key to knowing if there are remainders, and it's  
all because of the %. In PHP, C++, and other languages, the % is known as a  

Modulus. It returns the remainder after dividing two numbers. If there is no  

remainder, it returns zero. In our example, it will return 0.8 */ 

    if($i == $_GET['page']){ 
         $whatDisplay  .= '<td>['.$i."]</td> "; 
    }else{ 
        $whatDisplay .="<td><a href=\"$_SERVER[PHP_SELF]?page=$i&category=$_GET[category]\"  class='articles_red'>[$i]</a> </td>"; 
    } 
    /* This is the exact statement that turns pages into link form that is used  

above */  

    }   // Ends the if statement 

  if ($totalRows - ($limit * $_GET['page']) > 0) {

    $pagenext = abs($_GET['page']) +1; 
    // Fancy way of adding 1 to page 

    $whatDisplay .="<td><a href=\"$_SERVER[PHP_SELF]?page=$pagenext&category=$_GET[category]\"  class='articles_red'>NEXT".$limit."</a></td>"; 
    /* Since there are pages remaining, this outputs NEXT in link form. */  
 } else { 
   $whatDisplay.= "<td>NEXT ".$limit. ' </td>';  
    /* If we're on the last page possible, NEXT will NOT be displayed in link  
form. */ 
    } 

$whatDisplay.= '</tr></table>';
 }

 //return $whatDisplay;

  }

[bpat1434]

Well, here's a short example of the for() loop you use to count that I would use:

function Paging($globalDisplay) {
  global $maxPagesToShow;
  // ... Code snipped for space

  $cur = $_GET['page'];
  if($maxPagesToShow%2 == 0)
    $min = $maxPagesToShow/2;
  else
    $min = ($maxPagesToShow+1)/2

  if($min < 1 || ($cur-$min < 1))
    $i = 1;
  else
    $i = $cur - $min;

  $max = $cur+$min;

  if($max > $numofpages)
    $max = $numofpages;

  for($i; $i<$max, $i++)
  {
        if($i == $_GET['page']){
            $whatDisplay.= '<td bgcolor="#f1f1f1">['.$i."] </td>";
        } else{
           $whatDisplay .= "<td><a href=\"$_SERVER[PHP_SELF]?page=$i&category=$_GET[category]\"  class='articles_red'>[$i]</a> </td>";  

        }
  }
// ... Code snipped for space

But that's just an example. The basics of what's going on are this:
1.) We make sure we can see the $maxPagesToShow variable, which tells us how many page links to show
2.) We use a local variable rather than $GET as it's easier
3.) If $maxPagesToShow is even, then we just divide by two to get the span on either side of $GET['page']
3.b) Otherwise, we need to add 1, then divide by two to get the span.
4.) If the current page less the span is 0 or below, we default it to 1. We can't have -1 row start can we?
5.) Set the max to current page plus the span.
6.) Check to see that $max is not over the total number of pages
7.) Loop through to display page links as your previous code did

Hope that helps.