PHP XML paginator with foreach - php

Question

I have code, which take information from xml file(in xml have example 5 blocks "groupRecord", can be more ). And i want show per page 4 blocks. I already wrote this part.
$xmlDoc = new DOMDocument();
$xmlDoc->load('GetLoyalty5001.xml');
$totaldata = $xmlDoc->getElementsByTagName("groupRecord")->length;
$Pages = intval($_GET['page']);
if(!isset($Pages) || $Pages==0)
{
$Pages=1;
}
$DataPerPage=4;
$numPages = ceil($totaldata/$DataPerPage);
$shopingdata = $xmlDoc->getElementsByTagName("groupRecord");
foreach($shopingdata as $key=>$datashoping)
{
if(??)
{
?>
<tr>
<td width="156">STORE ADDRESS</td>
<td width="222">STORE ADDRESS</td>
<td width="266">STORE ADDRESS</td>
<td width="161">STORE ADDRESS</td>
<td width="156">STORE ADDRESS</td>
</tr>
<?php
}
}
?>
What must I put in place of question mark in condition?

Answer 1

Well, you have everything you need already, just use $numPages which yields the number of pages you have.
for ($a = 1; $a <= $numPages; $a++) {
echo '' . $a . '';
}

Answer 2

You were close, but the idea of how to calculate the number of items in the list seemed to go wrong. All you needed to do was use the number of elements that you fetched using $xmlDoc->getElementsByTagName("groupRecord"). I've reduced the code and this should do what your after...
$xmlDoc = new DOMDocument();
$xmlDoc->loadXML($xml);
$shopingdata = $xmlDoc->getElementsByTagName("groupRecord");
$perPage = 4;
$currentPage = intval($_GET['page']);
$numPages = ceil($shopingdata->length / $perPage);
if(!$currentPage || $currentPage > $numPages)
{
$currentPage = 0;
}
$start = $currentPage * $perPage;
$end = ($currentPage * $perPage) + $perPage;
foreach($shopingdata as $key=>$datashoping)
{
if($key >= $start && $key < $end)
{
?>
<tr>
<td width="156">STORE ADDRESS</td>
<td width="222">STORE ADDRESS</td>
<td width="266">STORE ADDRESS</td>
<td width="161">STORE ADDRESS</td>
<td width="156">STORE ADDRESS</td>
</tr>
<?php
}
}
for($a=1;$a<=$numPages;$a++)
{
echo ''.$a.'';
}