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File: pagination.php

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  Classes of mohit mohit  >  Pagination MD  >  pagination.php  
File: pagination.php
Role: Class source
Content type: text/plain
Description: main class file
Class: Pagination MD
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Contents

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<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;
        }
          
}?>