PHP paging class example PHP and mysql simple paging class code

class PageModel {
 /**
 * Get the paging array
 * @param unknown $page The current number of pages
 * @param unknown $goodsCount The total number of products
 * @param unknown $pageLength The number of pages displayed on each page
*/
 public static function getPageArr($page, $goodsCount, $pageCountLength, $pageLength) {
 //Total number of pages
 $allPageCount = ceil($goodsCount / $pageLength);
 //If the page is always shorter than the length, set the page length to the total number of pages
 if ($allPageCount <= $pageCountLength) {
 $allPageCount = ceil($goodsCount / $pageLength);
 }
 //The total number of pages is displayed in one page
 if ($allPageCount <= $pageCountLength) {
 for ($i = 0; $i < $allPageCount; $i ++) {
 $arr[] = array( 'page' => $i + 1);
 }
 return $arr;
 }
 //The length before and after
 $halfLength = floor($pageCountLength / 2);
 //Because it is too small, put it in the original position , left
 if ($page <= $halfLength) {
 $arr = array();
 for ($i = 0; $i < $pageCountLength; $i ++) {
 $arr[] = array ('page' => $i + 1);
 }
 return $arr;
 }
 //If it is too big, only the edge will be fetched. If it exceeds, only the edge will be fetched
 if ($page > $allPageCount - floor ($pageCountLength / 2)) {
 for ($i = -$pageCountLength; $i < 0; $i ++) {
 $arr[] = array('page' => $allPageCount + $i + 1);
 }
 return $arr;
 }
 //The middle number, take out the middle number
 for ($i = -$halfLength; $i < $pageCountLength - $halfLength; $i ++) {
 $arr[] = array('page' => $page + $i);
 }
 return $arr;
 }
}

2. PHP paging class code

Code:

class Helper_Page{
/**Total number of messages*/
var $infoCount;
/**total pages*/
var $pageCount ;
/**Number of items displayed per page*/
var $items;
/**Current page number*/
var $pageNo;
/**The starting position of the query*/
var $startPos;
/**Next page */
var $nextPageNo;
/**Previous page*/
var $prevPageNo;
function Helper_Page($infoCount, $items, $pageNo)
{
$this-> ;infoCount = $infoCount;
$this->items = $items;
$this->pageNo = $pageNo;
$this->pageCount = $this->GetPageCount();
$this-> ;AdjustPageNo();
$this->startPos = $this->GetStartPos();
}
function AdjustPageNo()
{
if($this->pageNo == '' || $this-> ;pageNo < 1)
$this->pageNo = 1;
if ($this->pageNo > $this->pageCount)
$this->pageNo = $this->pageCount;
 }
/**
* Next page
*/
function GoToNextPage()
{
$nextPageNo = $this->pageNo + 1;
if ($nextPageNo > $this->pageCount)
{
$this- >nextPageNo = $this->pageCount;
return false;
}
$this->nextPageNo = $nextPageNo;
return true;
}
/**
* Previous page
*/
function GotoPrevPage()
{
$prevPageNo = $this->pageNo - 1;
if ($prevPageNo < 1)
{
$this->prevPageNo = 1;
return false;
}
$this->prevPageNo = $prevPageNo ;
return true;
}
function GetPageCount()
{
return ceil($this->infoCount / $this->items);
}
function GetStartPos()
{
return ($this-> pageNo - 1) * $this->items;
}
}