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File: pager.class.php

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  Classes of regin  >  Regin's Pager  >  pager.class.php  >  Download  
File: pager.class.php
Role: Class source
Content type: text/plain
Description: The class file
Class: Regin's Pager
Show MySQL query results split in multiple pages
Author: By
Last change: Copyright notice
Date: 8 years ago
Size: 3,700 bytes
 

Contents

Class file image Download
<?php
/*
Copyright Regin Gaarsmand
http://www.sourcerally.net/regin
Originally published and maintained on:
http://www.sourcerally.net/Scripts/17-Paging-with-PHP-and-MySQL
LGPL license
*/
class pager
{
    var
$sql;
    var
$getvar;
    var
$rows;
    var
$start;
    var
$getvar_val;
    var
$pager;
    var
$result;
   
    function
__construct($sql,$getvar,$length)
    {
       
$this->result=null;
       
$this->sql = $sql;
       
$this->getvar = $getvar;
       
$this->rows = 0;
       
$this->start = 0;
       
$this->getvar_val = 1;
       
$this->pager = null;
       
$this->SetLength($length);
       
$this->GetStart();
       
$this->doQuery();
    }
   
   
//Sets $length
 
function SetLength($length)
  {
     
$this->length = (int)$length;
      if(
$this->length<0)
      {
         
$this->length = 0;
      }
  }
 
  function
doQuery()
  {
     
$sql = trim($this->sql);
     
$sql = substr($sql,6);
     
$sql = 'SELECT SQL_CALC_FOUND_ROWS '.$sql.' limit '.$this->start.', '.$this->length;
     
$this->result = mysql_query($sql);
     
$sql = "SELECT FOUND_ROWS()";
     
$result = mysql_query($sql);
     
$this->rows = mysql_result($result,0);
  }
 
 
//getvar_val() gets the
  //$getvar_val is a positive integer - > 0
 
function Set_Getvar_val()
  {
     
$this->getvar_val = (int)$_GET[$this->getvar];
      if(
$this->getvar_val<1)
      {
         
$this->getvar_val = 1;
      }
  }

 
//Gets the start of the data
 
function GetStart()
  {
     
$this->Set_Getvar_val();
     
$this->start = (($this->getvar_val-1)*$this->length);
  }
 
    function
show($next="Next",$last="Last",$separator=" ")
    {
       
$array = $this->pager();
       
$str = array();
        foreach(
$array as $k => $v)
        {
            if(
$k!='next'&&$k!='last')
            {
                if(
$k==$this->getvar_val)
                {
                   
$str[] = $k;
                }
                else
                {
                   
$str[] = '<a href="'.$v.'">'.$k.'</a>';
                }
            }
        }
       
$str = implode($separator, $str);
       
$rt = $array['last']===null?"":'<a href="'.$array['last'].'">'.$last.'</a>'.$separator;
       
$rt .= $str.$separator;
       
$rt .= $array['next']===null?"":'<a href="'.$array['next'].'">'.$next.'</a>';
        return
$rt;
    }
   
    
//Returns an array of the links arround the given point
    //['next'] => next page
    //['last'] => last page
   
function pager($margin=10)
    {
       
$path = $_GET;
       
$newpath = $PHP_SELF."?";
        foreach(
$path as $key => $value)
        {
            if(
$key!=$this->getvar)
            {
               
$newpath .= $key."=".$value;
               
$newpath .="&amp;";
            }
        }
       
$newpath .= $this->getvar;

       
$linkpaths = array();
       
$current = $this->start / $this->length + 1;
       
$pages = ceil(($this->rows/$this->length));
       
$pagerstart = $current-$margin;
       
$pagerstart = ($pagerstart<1)?1:$pagerstart;
       
$pagerend = $current+$margin;
       
       
$pagerend = ( $pagerend > $pages ) ? ( ceil( ( $this->rows / $this->length ) ) ): $pagerend;

        for(
$i=$pagerstart;$i < ($pagerend+1);$i++)
        {
           
$linkpaths[$i] = $newpath."=".($i);
        }
        if(
$linkpaths[($current+1)]!=null)
        {
           
$linkpaths['next']=$linkpaths[($current+1)];
        }
        if(
$linkpaths[($current-1)]!=null)
        {
           
$linkpaths['last']=$linkpaths[($current-1)];
        }
        return
$linkpaths;
    }
}
?>