php pagination of an array with previous and next tab - php

Question

I have this array which contain around 1000 records. I want to display 20 array records per page.
$list=array(
array([title]=>"sony", [description]=>"camera"),
array([title]=>"sony", [description]=>"mobiles"),
array([title]=>"lenovo", [description]=>"laptop"),
array([title]=>"lenovo", [description]=>"mobiles")
);
I have used the following code for pagination. It is giving me a long row for pagination. Can someone help me to include previous and next code to my existing code so that my pagination will look good.
$page = isset($_REQUEST['page']) && $_REQUEST['page'] > 0 ? $_REQUEST['page'] : 1;
function display($list, $page = 1)
{
$start = ($page - 1) * 2;
$list = array_slice($list, $start, 15);
foreach ($list as $key => $val) {
echo $val['title'] . '<br/>';
echo $val['description'] . '<br/>';
echo "<br>";
}} $len = count($list);
$pages = ceil($len / 2);
if ($page > $pages or $page < 1)
{
echo 'page not found';
}
else
{
display($list, $page);
for ($i = 1 ; $i <= $pages ; $i++)
{
$current = ($i == $page) ? TRUE : FALSE;
if ($current) {
echo '<b>' . $i . '</b>';
}
else
{
?>
<?php echo $i;?>
<?php
}
}
}

Answer 1

Here's an example with the data array from your question.
The example
The page size is assumed to be 2 (20 in your question).
The size of the data array does not matter.
The start parameter is provided (as in your example) thru a GET parameter http://localhost/flipkart-api/fkt_offer.php?…start=index_or_page. This parameter is available in the script as $_GET['start'].
The previous and next start indices are to be calculated ($start +/- $maxpage, etc.).
To keep this example simple, I took the start index, not the page number, as parameter. But you also could use a page number and calculate the index, of course.
For the reason of brevity I omitted error checking ("what if no more items", etc.).
Code:
<?php
// The data array
$list=array(
array('title'=>"sony", 'description'=>"camera"),
array('title'=>"sony", 'description'=>"mobiles"),
array('title'=>"lenovo", 'description'=>"laptop"),
array('title'=>"lenovo", 'description'=>"mobiles")
);
// Evaluate URL
$proto = ((isset($_SERVER["HTTPS"])) && (strtoupper($_SERVER["HTTPS"]) == 'ON')) ? "https://" : "http://";
$hname = getenv("SERVER_NAME");
$port = getenv("SERVER_PORT");
if ( (($port==80)&&($proto=='http://')) || (($port==443)&&($proto=='https://')) ) { $port = ''; }
$params = '';
foreach ($_GET as $key=>$value) {
if (strtolower($key)=='start') continue;
$params .= (empty($params)) ? "$key=$value" : "&$key=$value";
}
$url = $proto . $hname . $port. $_SERVER['SCRIPT_NAME'] . '?' . $params;
// Page contents
$last = count($list)-1;
$start = (isset($_GET['start'])) ? intval($_GET['start']) : 0;
if ($start<0) $start = 0; if ($start > $last) $start = $last;
$maxpage = 2;
echo "<p>Start index = $start</p>" . PHP_EOL;
$curpage = 0;
for($xi=$start; $xi<=$last; $xi++) {
if ($curpage >= $maxpage) break;
$curpage++;
echo 'Entry ' . $curpage .
': ' . $list[$xi]['title'] .
' - ' . $list[$xi]['description'] .
'<br />' . PHP_EOL;
}
// Navigation
$prev = $start - $maxpage; if ($prev<0) $prev = 0;
$next = ( ($start+$maxpage) > $last) ? $start : $start + $maxpage;
$prev = ( ($start-$maxpage) < 0) ? 0 : $start - $maxpage;
echo '<p>Previous ';
echo 'Next</p>';
?>
Result (e.g)
Start index = 2
Entry 1: lenovo - laptop
Entry 2: lenovo - mobiles
Previous Next