PHP Classes

File: pagination.php

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File: pagination.php
Role: Class source
Content type: text/plain
Description: main class file
Class: Pagination MD
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Author: By
Last change: removed a comment
Date: 14 years ago
Size: 4,718 bytes
 

Contents

Class file image Download
<script>
function change_page(val,page,qry_st)
{
window.location = page+'?pagenum='+val+qry_st;
 }
 </script>
<?php
      

     
// for pagination of
     // two types ,nomal link and dropdown menu
    // for normal links pass 'links' as the third parameter while creating the object and for dropdown pagination pass 'dropdown'.
class pagination
{
 var
$max_results_per_page=0; // no. of results to be shown per page
 
var $total_results=0; //no. of all results to be shown over all pages
 
var $max_pages =0; // max. pages i.e the maximum number of pages for a particular query , calculated in the constructor
 
var $current_page=0 ; // the page no. that is currently rendered
 
var $pagination_string=''; // the output string , which contains , the actual pagination links/dropdown
 
var $page_x_of_y = ''; // the output string , which contains the string like 'page 1 of 2'
 
var $qry_string = ''; // the query string with the address ,useful when the pagination is done on pages which has search feature as the GET parameters are not lost

 
function __construct($total_res,$res_per_page,$pagination_type)
    {
    
$this->max_results_per_page = $res_per_page;
    
    
$this->total_results = $total_res;
    
    
$this->max_pages = ceil($total_res/$res_per_page);
    
    
$query_string = '';
            if(
is_array($_GET))
             {
             foreach(
$_GET as $key=>$value)
              {
              if(
$key!='pagenum')
                
$query_string .= '&'.$key.'='.$value;
              }
             }
   
$this->qry_string = $query_string;
   
        if(isset(
$_REQUEST['pagenum']))
                {
                    if(
$_REQUEST['pagenum']>$this->max_pages)
                        {
                           
$this->current_page = $this->max_pages;
                        }
                    else if(
$_REQUEST['pagenum']<1)
                        {
                           
$this->current_page = 1;
                        }
                    else
                        {
                           
$this->current_page = $_REQUEST['pagenum'];
                        }
                }
        else
            {
               
$this->current_page = 1;
            }
           
$this->page_x_of_y = 'page '.$this->current_page.' of '.$this->max_pages;
            switch(
$pagination_type)
            {
            case
'links':
                       
$this->page_links();
                         break;
            case
'dropdown':
                       
$this->page_dropdown();
                        break;
            default : die(
'Sorry no such pagination style as "'.$pagination_type.'" exist');
            }
    }
public function
page_links()
        {
    if (
$this->current_page > 1)
        {
           
$page = $this->current_page-1;
           

           
// for image arrows
         // use this
        // $prev = "<a href='".$_SERVER['PHP_SELF']."?pagenum=$page".$qry_string."'><img src='../images/reverse.gif' width='10px' height='10px'></a> ";
       
        //if you dont have images use this
       
$prev = "<a href='".$_SERVER['PHP_SELF']."?pagenum=$page".$this->qry_string."'>&lt;&lt;</a> ";
        }
    else
        {
           
$prev = '&nbsp;'; // we're on page one, don't print previous link
           
$first = '&nbsp;'; // nor the first page link
       
}

    if (
$this->current_page < $this->max_pages )
        {
           
$page = $this->current_page + 1;
       
// for image arrows
         // use this
        // $next = "<a href='".$_SERVER['PHP_SELF']."?pagenum=".$page."'><img src='../images/forward.gif' width='10px' height='10px'></a> ";
       
        //if you dont have images use this
       
   
$next = "<a href='".$_SERVER['PHP_SELF']."?pagenum=".$page.$this->qry_string."'>&gt;&gt;</a> ";
        }
    else
        {
           
$next = '&nbsp;'; // we're on the last page, don't print next link
           
$last = '&nbsp;'; // nor the last page link
       
}
       
        for(
$page = 1; $page <= $this->max_pages; $page++)
        {
            if (
$page == $this->current_page)
                {
                   
$nav .= " $page "; // no need to create a link to current page
               
}
            else
                {
                    if(
$page>=$this->current_page-5 && $page<=$this->current_page+5)
                       
$nav .= "<a href='".$_SERVER['PHP_SELF']."?pagenum=$page"."$this->qry_string'>".$page."</a> ";
                }
           }
               
$this->pagination_string = $prev.$nav.$next;
         
        }
    public function
page_dropdown()
        {
$nav = "<select name='pagenum' onChange=change_page(this.value,'".$_SERVER['PHP_SELF']."','".$this->qry_string."')>";
        for(
$page = 1; $page <= $this->max_pages; $page++)
        {
          
            if (
$page == $this->current_page)
                {
                       
$nav .= "<option value='".$page."' selected>".$page."</option> ";
                }
                else
                {
                       
$nav .= "<option value='".$page."' >".$page."</option> ";
                }
           }
       
$nav .= "</select>";
       
$this->pagination_string = $nav;
        }
    public function
get_pagination_query($qry)
        {
       
$offset = ($this->current_page - 1) * $this->max_results_per_page;
       
$max=" LIMIT $offset, $this->max_results_per_page";
       
$new_query = $qry."".$max;
        return
$new_query;
        }
         
}
?>