<?php
/*
Author : Dao Hoang Qui
Email : dhoangqui@gmail.com or daohoangqui@yahoo.com
Date : 05/09/2009
Function : Paging in 3 ways : "Prev|Next" and "<< < 1 2 3 > >>" and "<< < 1 2 3 > >> Sum : 9999"
*/
class Pager
{
/*
Function : find the started number of specific page
Paremeter : $limit is the row number in one page.
Return : interger to determinate start position for LIMIT start,length in sql statement
*/
function findStart($limit)
{
if(!isset($_GET["page"]) || ($_GET["page"]=="1"))
{
$start = 0;
$_GET["page"] = 1;
}
else
$start = ($_GET["page"]-1) * $limit;
return $start;
}
/*
Function : sum pages from the number records in database and the number rows in the page
Paremeter : $limit is the same above ; $count is the number of records in database.
Return : interger to determinate the total pages to display.
*/
function findPages($count,$limit)
{
return (($count%$limit)==0) ? $count/$limit : floor($count/$limit)+1;
}
//Paging in Prev|Next
function nextPrev($curPage,$pages)
{
$nextPrev = "";
if (($curPage-1)<=0)
$nextPrev = "Trang trước";
else
$nextPrev = "<a href='".$_SERVER["PHP_SELF"]."?page=".($curPage-1)."'>Trang trước </a>";
$nextPrev .= " | ";
if (($curPage+1)>$pages)
$nextPrev .= "Trang sau";
else
$nextPrev .= "<a href='".$_SERVER["PHP_SELF"]."?page=".($curPage+1)."'>Trang sau </a>";
return $nextPrev;
}
//Paging in << < 1 2 3 > >>
function pageList($curPage,$pages)
{
$pageList = "";
// << <
if (($curPage-1)<=0)
$pageList = "";
else
{
$pageList = "<a href='".$_SERVER['PHP_SELF']."?page=1"."'><< </a>";
$pageList .= "<a href='".$_SERVER['PHP_SELF']."?page=".($curPage-1)."'> <</a>";
}
// 1 2 3
for ($page=1 ; $page<=$pages ; $page++)
if($page == $curPage)
$pageList .= " "."<a href='".$_SERVER['PHP_SELF']."?page=".$page."' style='color:RED'>".$page."</a>"." ";
else
$pageList .= " "."<a href='".$_SERVER['PHP_SELF']."?page=".$page."'>".$page."</a>"." ";
// > >>
if (($curPage+1)>$pages)
$pageList .= "";
else
{
$pageList .= "<a href='".$_SERVER['PHP_SELF']."?page=".($curPage+1)."'>> </a>";
$pageList .= "<a href='".$_SERVER['PHP_SELF']."?page=".$pages."'>>></a>";
}
//return
return $pageList;
}
//Paging in << < 1 2 3 > >> Sum : 100
function etcPageList($curPage,$pages,$limit)
{
$pageList = "";
// << <
if (($curPage-1)<=0)
$pageList = "";
else
{
$pageList = "<a href='".$_SERVER['PHP_SELF']."?page=1"."'><< </a>";
$pageList .= "<a href='".$_SERVER['PHP_SELF']."?page=".($curPage-1)."'> <</a>";
}
// 1 2 3
if ($pages < $limit)
$limit = $pages;
$limit = (($limit+$curPage-1)<$pages) ? $limit+$curPage-1 : $pages;
for ($page=$curPage ; $page<=$limit ; $page++)
if($page == $curPage)
$pageList .= " "."<a href='".$_SERVER['PHP_SELF']."?page=".$page."' style='color:RED'>".$page."</a>"." ";
else
$pageList .= " "."<a href='".$_SERVER['PHP_SELF']."?page=".$page."'>".$page."</a>"." ";
// > >>
if (($curPage+1)>$pages)
$pageList .= "";
else
{
$pageList .= "<a href='".$_SERVER['PHP_SELF']."?page=".($curPage+1)."'>> </a>";
$pageList .= "<a href='".$_SERVER['PHP_SELF']."?page=".$pages."'>>></a>";
}
//Sum :
$pageList .= " Tổng cộng : ".$pages;
//return
return $pageList;
}
}
?>
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