Pagination Producing Unexpected Results. What did I do wrong? - php

Question

I am using code A, and everything is as expected. When I try to add pagination script(code B), the results are no longer as expected. What did I do wrong? Any assistance would be much appreciated. Thanks....
code A:
$data = 'path/to/file.txt';
$counts = array_count_values(
array_map(function($line){return strtoupper(end(explode('||', $line, -4)));},
array_filter(file($data), 'trim')));
foreach($counts as $key1=>$value){
echo '<div>'. $key1 .' - '. $value .'</div>';
}
code B:
$link_range = 2;
$listings = 2;
if (isset($_SERVER['QUERY_STRING'])) {
$currentPage = $_SERVER['QUERY_STRING'];
} else {
$currentPage = '0';
}
$reg_ex = "[page=]";
$replace_word = "";
$str = $currentPage;
$currentPage = ''.ereg_replace($reg_ex, $replace_word, $str).'';
$data = 'path/to/file.txt';
$counts = array_count_values(
array_map(function($line){return strtoupper(end(explode('||', $line, -4)));},
array_filter(file($data), 'trim')));
$dataArray = $counts;
// Pagination settings
$perPage = $listings;
$numPages = ceil(count($dataArray) / $perPage);
if(!$currentPage || $currentPage > $numPages)
$currentPage = 0;
$start = $currentPage * $perPage;
$end = ($currentPage * $perPage) + $perPage;
// Extract ones we need
foreach($dataArray AS $keys => $val)
{
if($keys >= $start && $keys < $end)
$pagedData[] = $dataArray[$keys];
}
$range = $link_range;
if ($currentPage > 0 && $currentPage < $numPages) {
// show << link to go back to page 1
echo '<< |';
// get previous page num
$prevpage = $currentPage - 1;
// show < link to go back to 1 page
echo ' < |';
} // end if
// loop to show links to range of pages around current page
for ($x = ($currentPage - $range); $x < (($currentPage + $range) + 1); $x++) {
// if it's a valid page number...
if (($x > -1) && ($x <= $numPages - 1)) {
// if we're on current page...
if ($x == $currentPage) {
// 'highlight' it but don't make a link
echo ' '. ($x + 1) .' |';
// if not current page...
} else {
// make it a link
echo ' '. ($x + 1) .' |';
} // end else
} // end if
} // end for
if ($currentPage != $numPages - 1) {
// get next page
$nextpage = $currentPage + 1;
// echo forward link for next page
echo ' > |';
// echo forward link for lastpage
echo ' >>
';
} // end if
foreach($pagedData as $key1=>$value){
echo '<div>'. $key1 .' - '. $value .'</div>';
}
Lets say file.txt contains:
a||b||Vietnam||c||d||e||f
a||b||HONG KONG||c||d||e||f
a||b||Vietnam||c||d||e||f
a||b||INDONESIA||c||d||e||f
a||b||UNITED STATES||c||d||e||f
ect.

Answer 1

Your problem is here (in which there's confusion about keys/values):
// Extract ones we need
foreach($dataArray AS $keys => $val)
{
if($keys >= $start && $keys < $end)
$pagedData[] = $dataArray[$keys];
}
Just replace that code with:
$pagedData = array_slice($dataArray, $start, $listings, true);
array_slice documentation